Hi all,
I have a query regarding a head-swap upgrade which I've never attempted before, so any help would be much appreciated!
We currently have a single-head FAS3020 running a small number of SATA and FC shelves. The head is EOL and so I've been able to persuade my bean counters to buy me a pair of FAS3240 heads to use as an HA pair. We're keeping all the disk shelves, so I "just" need to swap the heads over. From what I've read, it's best practice to upgrade the old head to the version of ONTAP that the new head will run, but we don't have that option as the 3020 won't run ONTAP 8 and the 3240's won't run ONTAP 7! This is our central storage system, using CIFS, NFS and LUNs over FC, so getting it wrong isn't really an option. Is this going to be achievable or should I call professional services in? I'd rather do this myself if possible, not least because PS are rather expensive... Can I just copy the latest ONTAP onto the existing vol0 and shut the head down, power up the new head and make the disks owned by the new head? I assume I'll also have to tell the FC switches about the new WWPNs for the LUNs to work. Will that work or will I end up with a very large, very expensive brick?
Thanks! Simon.
Are you sure the 3240 won't run Ontap 7? I have a 3270 cluster running ontap 7 (7.3.6 was required, I recommend at least 7.3.6P2).
________________________________ From: Simon Ogilvie simon.ogilvie@gmail.com To: toasters@teaparty.net Sent: Tuesday, January 17, 2012 10:27 AM Subject: Head swap
Hi all,
I have a query regarding a head-swap upgrade which I've never attempted before, so any help would be much appreciated!
We currently have a single-head FAS3020 running a small number of SATA and FC shelves. The head is EOL and so I've been able to persuade my bean counters to buy me a pair of FAS3240 heads to use as an HA pair. We're keeping all the disk shelves, so I "just" need to swap the heads over. From what I've read, it's best practice to upgrade the old head to the version of ONTAP that the new head will run, but we don't have that option as the 3020 won't run ONTAP 8 and the 3240's won't run ONTAP 7! This is our central storage system, using CIFS, NFS and LUNs over FC, so getting it wrong isn't really an option. Is this going to be achievable or should I call professional services in? I'd rather do this myself if possible, not least because PS are rather expensive... Can I just copy the latest ONTAP onto the existing vol0 and shut the head down, power up the new head and make the disks owned by the new head? I assume I'll also have to tell the FC switches about the new WWPNs for the LUNs to work. Will that work or will I end up with a very large, very expensive brick?
Thanks! Simon. _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
It would surprise me if the 3240 wasn't able to run 7.3.6 or anything like that, but it always depends on the hardware configuration.
We did have a 3240 MC some time ago that was running 7.3.6 first and we upgraded to 8.0 later, so it definitely was on Ontap 7.
Bye,
Alexander Griesser
System-Administrator
ANEXIA Internetdienstleistungs GmbH
Telefon: +43-463-208501-320
Telefax: +43-463-208501-500
E-Mail: ag@anexia.at
Web: http://www.anexia.at
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Geschäftsführer: Alexander Windbichler
Firmenbuch: FN 289918a | Gerichtsstand: Klagenfurt | UID-Nummer: AT U63216601
Von: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] Im Auftrag von Fred Grieco Gesendet: Dienstag, 17. Jänner 2012 16:50 An: Simon Ogilvie; toasters@teaparty.net Betreff: Re: Head swap
Are you sure the 3240 won't run Ontap 7? I have a 3270 cluster running ontap 7 (7.3.6 was required, I recommend at least 7.3.6P2).
________________________________
From: Simon Ogilvie simon.ogilvie@gmail.com To: toasters@teaparty.net Sent: Tuesday, January 17, 2012 10:27 AM Subject: Head swap
Hi all,
I have a query regarding a head-swap upgrade which I've never attempted before, so any help would be much appreciated!
We currently have a single-head FAS3020 running a small number of SATA and FC shelves. The head is EOL and so I've been able to persuade my bean counters to buy me a pair of FAS3240 heads to use as an HA pair. We're keeping all the disk shelves, so I "just" need to swap the heads over. From what I've read, it's best practice to upgrade the old head to the version of ONTAP that the new head will run, but we don't have that option as the 3020 won't run ONTAP 8 and the 3240's won't run ONTAP 7! This is our central storage system, using CIFS, NFS and LUNs over FC, so getting it wrong isn't really an option. Is this going to be achievable or should I call professional services in? I'd rather do this myself if possible, not least because PS are rather expensive... Can I just copy the latest ONTAP onto the existing vol0 and shut the head down, power up the new head and make the disks owned by the new head? I assume I'll also have to tell the FC switches about the new WWPNs for the LUNs to work. Will that work or will I end up with a very large, very expensive brick?
Thanks! Simon. _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
Simon,
You could upgrade to 7.3.6, then do the swap (as both the FAS3000 and FAS3200 series run 7.3.6), and then carry on with your upgrade to 8.
Thank you, Tim
-----Original Message----- From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Simon Ogilvie Sent: Tuesday, January 17, 2012 7:27 AM To: toasters@teaparty.net Subject: Head swap
Hi all,
I have a query regarding a head-swap upgrade which I've never attempted before, so any help would be much appreciated!
We currently have a single-head FAS3020 running a small number of SATA and FC shelves. The head is EOL and so I've been able to persuade my bean counters to buy me a pair of FAS3240 heads to use as an HA pair. We're keeping all the disk shelves, so I "just" need to swap the heads over. From what I've read, it's best practice to upgrade the old head to the version of ONTAP that the new head will run, but we don't have that option as the 3020 won't run ONTAP 8 and the 3240's won't run ONTAP 7! This is our central storage system, using CIFS, NFS and LUNs over FC, so getting it wrong isn't really an option. Is this going to be achievable or should I call professional services in? I'd rather do this myself if possible, not least because PS are rather expensive... Can I just copy the latest ONTAP onto the existing vol0 and shut the head down, power up the new head and make the disks owned by the new head? I assume I'll also have to tell the FC switches about the new WWPNs for the LUNs to work. Will that work or will I end up with a very large, very expensive brick?
Thanks! Simon. _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
According to NOW, the FAS3240 will run 7.3.6. So you will want to downgrade the two new heads to 7.3.6 first. And upgrade your FAS3020 to 7.3.6. After the head swap you will be able to upgrade to 8.0.x.
We've done a number of head swaps here, and for the most part they've been easy. Make sure you keep a copy of all the config of your old head around. Things like LUN serial numbers, nodenames change after and you may need to set them back to the original (unless you want to reconfig your clients).
When we went from a single head to a cluster (years back), we built the new cluster first (at the same level of OnTap as the single head). Then we shut down the old head, moved the disk shelves over and then reconfigured OnTap (ip addresses, CIFS shares, NFS exports, etc). We used a new root volume, at that time it seemed easier than figuring out how to do a head swap from a single head to a cluster.
----- Original Message ----- From: "Simon Ogilvie" simon.ogilvie@gmail.com To: toasters@teaparty.net Sent: Tuesday, January 17, 2012 7:27:23 AM Subject: Head swap
Hi all,
I have a query regarding a head-swap upgrade which I've never attempted before, so any help would be much appreciated!
We currently have a single-head FAS3020 running a small number of SATA and FC shelves. The head is EOL and so I've been able to persuade my bean counters to buy me a pair of FAS3240 heads to use as an HA pair. We're keeping all the disk shelves, so I "just" need to swap the heads over. From what I've read, it's best practice to upgrade the old head to the version of ONTAP that the new head will run, but we don't have that option as the 3020 won't run ONTAP 8 and the 3240's won't run ONTAP 7! This is our central storage system, using CIFS, NFS and LUNs over FC, so getting it wrong isn't really an option. Is this going to be achievable or should I call professional services in? I'd rather do this myself if possible, not least because PS are rather expensive... Can I just copy the latest ONTAP onto the existing vol0 and shut the head down, power up the new head and make the disks owned by the new head? I assume I'll also have to tell the FC switches about the new WWPNs for the LUNs to work. Will that work or will I end up with a very large, very expensive brick?
Thanks! Simon. _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
Hi Simon
The way I would tackle this is indeed first of all bring the FAS-3020 to ONTAP 7.3.6.
Next resize the root volume to 205g or more. This is required in ONTAP 8.x and if it will pose a space problem the earlier you know the better.
Having done that fire of a full autosupport and keep a copy somehwere useful. That way if there are any issues or questions you'll have a copy of the config to work with. Also copy the /etc/hosts and /etc/rc files to your admin box.
The next thing I'd do is to use the lunserials script to retrieve and keep a copy of the LUN serials. This script can be found at http://communities.netapp.com/docs/DOC-1754.%C2%A0 Check that the scipt has indeed produced the lunoffline, lunonline and lunserial files with sane contents.
Follow up by copying /etc/rc and /etc/hosts to /etc/rc.preupgrade and /etc/hosts.preupgrade. Modify the files to suit the new system (typically network ports have different numbers)
Having done this I would then halt the old filer, and in maintenace mode do a mailbox destroy local and mailbox destroy partner. Then I would remove all disk ownership.
Then halt again and switch of the old FAS-3020, label cables and remove them and then put it on the desk of your nearest bean counter.
Rack the new FAS-3240's, cable everything up. Switch on one of the controllers which is going to replace the old-FAS3020 and boot it into maintenance mode. Take ownership of all the disks and check that you can see all the disks.
Check once again that you can see all the disks.
Now boot up the box normally. The FAS-3240 will boot Data ONTAP from Compact Flash. Whilst the FAS-3240 can support Data ONTAP 7.3.6 they ship nowadays with 8.0.2.
Capture the output whilst the FAS-3240 boots up. You should see some text along the lines of 'Assuming NVRAM swap' which means it will pick up the old volumes and not try to tamper with LUN serial numbers etc.
Once it has booted up I would use the date command to correct the date. Run cifs setup and put the filer back in the domain.
Once this has been done do a lun show -v and check a couple of LUN's that their serial numbers are intact.
If they are not use the lunoffline and lunserial scripts to correct them.
You will see that you have inherited old licenses so enter the correct licenses.
Use fcadmin to configure any FC ports to run FCP protocol.
Check with ifconfig that you have the network connections you are expecting to have and that you can ping some hosts on each network along with the default gateway.
After this (re-)install the Data ONTAP 8.0.2 software. This step ensures everything is in sync. Halt the box and reboot.
If necessary update the BIOS.
Once you have rebooted ensure the SP has the latest firmware. There have been a lot of bad SP bugs and you don't want to become a bug statistic. Also this is the time to run sp setup and ensure the SP is working.
Finally install the ONTAP docs and ask the bean counters for a payrise.
I have doubtless missed something but I that is I think the general lay of the land.
Where you will find a PS guy invaluable is if there is a problem; doing this kind of thing regularly means that we have seen lots of things before and can more readily get back in the air.
regards, good luck and happy filing! Kenneth
----------------------------------------
Date: Tue, 17 Jan 2012 15:27:23 +0000 Subject: Head swap From: simon.ogilvie@gmail.com To: toasters@teaparty.net
Hi all,
I have a query regarding a head-swap upgrade which I've never attempted before, so any help would be much appreciated!
We currently have a single-head FAS3020 running a small number of SATA and FC shelves. The head is EOL and so I've been able to persuade my bean counters to buy me a pair of FAS3240 heads to use as an HA pair. We're keeping all the disk shelves, so I "just" need to swap the heads over. From what I've read, it's best practice to upgrade the old head to the version of ONTAP that the new head will run, but we don't have that option as the 3020 won't run ONTAP 8 and the 3240's won't run ONTAP 7! This is our central storage system, using CIFS, NFS and LUNs over FC, so getting it wrong isn't really an option. Is this going to be achievable or should I call professional services in? I'd rather do this myself if possible, not least because PS are rather expensive... Can I just copy the latest ONTAP onto the existing vol0 and shut the head down, power up the new head and make the disks owned by the new head? I assume I'll also have to tell the FC switches about the new WWPNs for the LUNs to work. Will that work or will I end up with a very large, very expensive brick?
Thanks! Simon. _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
Wow - thanks for the fantastic response! Lots of really useful stuff here :)
On 17 January 2012 16:19, Kenneth Heal kheal@hotmail.com wrote:
The way I would tackle this is indeed first of all bring the FAS-3020 to ONTAP 7.3.6.
Next resize the root volume to 205g or more. This is required in ONTAP 8.x and if it will pose a space problem the earlier you know the better.
OK, first hurdle! The current vol0 is only 16Gb and running 7.2.6.1. Should I create a new "vol0" (can I even do that?) or just extend the existing one? I think I can do the upgrade to 7.3.6 - that's one thing I have done before :)
Having done that fire of a full autosupport and keep a copy somehwere useful. That way if there are any issues or questions you'll have a copy of the config to work with. Also copy the /etc/hosts and /etc/rc files to your admin box.
The next thing I'd do is to use the lunserials script to retrieve and keep a copy of the LUN serials. This script can be found at http://communities.netapp.com/docs/DOC-1754.%C2%A0 Check that the scipt has indeed produced the lunoffline, lunonline and lunserial files with sane contents.
That looks really useful - thanks! Should save a lot of headaches.
Follow up by copying /etc/rc and /etc/hosts to /etc/rc.preupgrade and /etc/hosts.preupgrade. Modify the files to suit the new system (typically network ports have different numbers)
Having done this I would then halt the old filer, and in maintenace mode do a mailbox destroy local and mailbox destroy partner. Then I would remove all disk ownership.
Then halt again and switch of the old FAS-3020, label cables and remove them and then put it on the desk of your nearest bean counter.
Rack the new FAS-3240's, cable everything up. Switch on one of the controllers which is going to replace the old-FAS3020 and boot it into maintenance mode. Take ownership of all the disks and check that you can see all the disks.
Check once again that you can see all the disks.
Now boot up the box normally. The FAS-3240 will boot Data ONTAP from Compact Flash. Whilst the FAS-3240 can support Data ONTAP 7.3.6 they ship nowadays with 8.0.2.
So if the 3240 boots from CF and picks up the config from vol0, do I need to have ONTAP 8 installed on vol0 as well?
Capture the output whilst the FAS-3240 boots up. You should see some text along the lines of 'Assuming NVRAM swap' which means it will pick up the old volumes and not try to tamper with LUN serial numbers etc.
Once it has booted up I would use the date command to correct the date. Run cifs setup and put the filer back in the domain.
Once this has been done do a lun show -v and check a couple of LUN's that their serial numbers are intact.
If they are not use the lunoffline and lunserial scripts to correct them.
You will see that you have inherited old licenses so enter the correct licenses.
Use fcadmin to configure any FC ports to run FCP protocol.
Check with ifconfig that you have the network connections you are expecting to have and that you can ping some hosts on each network along with the default gateway.
After this (re-)install the Data ONTAP 8.0.2 software. This step ensures everything is in sync. Halt the box and reboot.
If necessary update the BIOS.
Once you have rebooted ensure the SP has the latest firmware. There have been a lot of bad SP bugs and you don't want to become a bug statistic. Also this is the time to run sp setup and ensure the SP is working.
Finally install the ONTAP docs and ask the bean counters for a payrise.
Haha - that'll be the day!
I have doubtless missed something but I that is I think the general lay of the land.
One thing you may have missed was to make sure my CV is up to date in case it all goes horribly wrong ;)
Where you will find a PS guy invaluable is if there is a problem; doing this kind of thing regularly means that we have seen lots of things before and can more readily get back in the air.
regards, good luck and happy filing!
Thanks! :)
Hi
OK, first hurdle! The current vol0 is only 16Gb and running 7.2.6.1. Should I create a new "vol0" (can I even do that?) or just extend the existing one? I think I can do the upgrade to 7.3.6 - that's one thing I have done before :)
Every volume must have its own unique name. Whilst it is possible to create new root volume I would advise against this as you would lose a lot of your configs in the process. I would simply resize the existing root volume (vol0) to the desired size.
That looks really useful - thanks! Should save a lot of headaches.
:-) It sure does cut down on the use of analgesic medicines.
So if the 3240 boots from CF and picks up the config from vol0, do I need to have ONTAP 8 installed on vol0 as well?
The short answer is no. ONTAP8 can read and upgrade ONTAP7 aggregates, so it will be able to pick up the configs from vol0 and will start off by upgrading all your aggregates and volumes to the new wafl format.
Haha - that'll be the day! One thing you may have missed was to make sure my CV is up to date in case it all goes horribly wrong ;)
http://www.youtube.com/watch?v=igLayzIQYck
One thing you may need to do is update your zoning if you are using soft (WWNN) zoning.
regards Kenneth
I recently did a head swap for a 3040 standalone to a cluster of 3240 heads. The biggest problem was that the 3040 didn't have CF license installed. When the 3240 started to boot off of those disks, it had a conflict. It saw that the chassis was set for cluster mode, but CF was not licensed - then it went into a reboot loop.
I had to go into maintenance mode, change the mode of the new 3240s to NON-HA mode, boot them with the disks that came from the 3040, and then license CF and then go back into maintenance mode to change the mode back to Clustered mode.
This would have been a lot easier had I gotten a CF license to put on the 3040 ahead of time... or easier if I had anticipated it up front.
FAS3240 will run 7G. Why do you think it won't?
I would update to the latest 7.3.6, convert to software based disk ownership if you still are using hardware based one (this is a must with FAS3240), then swapped head and netboot 7.3.6. Reassign disks, reinstall 7.3.6 to get clean boot media and proceed with upgrading to 8.x if you prefer this version. Beware LUN serial number change, can cause real troubles.
But if you never did it before and this is production system and getting it wrong is really not an option ... may be calling PS is something to consider. Yes, this may look expensive, but then so is your data, is not it?
________________________________________ From: toasters-bounces@teaparty.net [toasters-bounces@teaparty.net] On Behalf Of Simon Ogilvie [simon.ogilvie@gmail.com] Sent: Tuesday, January 17, 2012 19:27 To: toasters@teaparty.net Subject: Head swap
Hi all,
I have a query regarding a head-swap upgrade which I've never attempted before, so any help would be much appreciated!
We currently have a single-head FAS3020 running a small number of SATA and FC shelves. The head is EOL and so I've been able to persuade my bean counters to buy me a pair of FAS3240 heads to use as an HA pair. We're keeping all the disk shelves, so I "just" need to swap the heads over. From what I've read, it's best practice to upgrade the old head to the version of ONTAP that the new head will run, but we don't have that option as the 3020 won't run ONTAP 8 and the 3240's won't run ONTAP 7! This is our central storage system, using CIFS, NFS and LUNs over FC, so getting it wrong isn't really an option. Is this going to be achievable or should I call professional services in? I'd rather do this myself if possible, not least because PS are rather expensive... Can I just copy the latest ONTAP onto the existing vol0 and shut the head down, power up the new head and make the disks owned by the new head? I assume I'll also have to tell the FC switches about the new WWPNs for the LUNs to work. Will that work or will I end up with a very large, very expensive brick?
Thanks! Simon. _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
Hi
I agree with Andrey. Head swap is looks like a easy. But, It is that the importance of things should be take to consider. I NOT threats scared you out of carrying out the plan.YMMV. Something happen.(incorrect disk owner, serial numbers ... etc.) So , it's a waste of long time.
-Motoyoshi (2012/01/18 3:36), Borzenkov, Andrey wrote:
FAS3240 will run 7G. Why do you think it won't?
I would update to the latest 7.3.6, convert to software based disk ownership if you still are using hardware based one (this is a must with FAS3240), then swapped head and netboot 7.3.6. Reassign disks, reinstall 7.3.6 to get clean boot media and proceed with upgrading to 8.x if you prefer this version. Beware LUN serial number change, can cause real troubles.
But if you never did it before and this is production system and getting it wrong is really not an option ... may be calling PS is something to consider. Yes, this may look expensive, but then so is your data, is not it?
From: toasters-bounces@teaparty.net [toasters-bounces@teaparty.net] On Behalf Of Simon Ogilvie [simon.ogilvie@gmail.com] Sent: Tuesday, January 17, 2012 19:27 To: toasters@teaparty.net Subject: Head swap
Hi all,
I have a query regarding a head-swap upgrade which I've never attempted before, so any help would be much appreciated!
We currently have a single-head FAS3020 running a small number of SATA and FC shelves. The head is EOL and so I've been able to persuade my bean counters to buy me a pair of FAS3240 heads to use as an HA pair. We're keeping all the disk shelves, so I "just" need to swap the heads over. From what I've read, it's best practice to upgrade the old head to the version of ONTAP that the new head will run, but we don't have that option as the 3020 won't run ONTAP 8 and the 3240's won't run ONTAP 7! This is our central storage system, using CIFS, NFS and LUNs over FC, so getting it wrong isn't really an option. Is this going to be achievable or should I call professional services in? I'd rather do this myself if possible, not least because PS are rather expensive... Can I just copy the latest ONTAP onto the existing vol0 and shut the head down, power up the new head and make the disks owned by the new head? I assume I'll also have to tell the FC switches about the new WWPNs for the LUNs to work. Will that work or will I end up with a very large, very expensive brick?
Thanks! Simon. _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
On 17 January 2012 18:36, Borzenkov, Andrey andrey.borzenkov@ts.fujitsu.com wrote:
FAS3240 will run 7G. Why do you think it won't?
I was under the impression that the 3240 architecture didn't allow me to run pre-8, but I'm happy to accept that I was probably wrong there, as others have also pointed this out.
I would update to the latest 7.3.6, convert to software based disk ownership if you still are using hardware based one (this is a must with FAS3240), then swapped head and netboot 7.3.6. Reassign disks, reinstall 7.3.6 to get clean boot media and proceed with upgrading to 8.x if you prefer this version.
OK, sounds doable.
Beware LUN serial number change, can cause real troubles.
Yes, this is probably the one part that I'm least clear on having had little to do with the FC/LUN side up to now. These were all setup before I inherited the system and have just worked quietly away without any intervention from me, so there's been no opportunity to learn it until now.
But if you never did it before and this is production system and getting it wrong is really not an option ... may be calling PS is something to consider. Yes, this may look expensive, but then so is your data, is not it?
Yes, you make a good point there! I should have factored in PS up-front as the bean counters are now complaining that I'm asking for more money! The business case relies on me persuading them that I'm incompetent, which is probably going to be quite easy ;)
Simon.
Simon, Quick question. Did the new FAS3240 pair come with new disk shelves? If not, how do you plan to distribute the old shelves across the two heads since you are going from a single head to a clustered pair. Each head needs its own root volume and spare disk(s). -net
On Tue, Jan 17, 2012 at 7:27 AM, Simon Ogilvie simon.ogilvie@gmail.com wrote:
Hi all,
I have a query regarding a head-swap upgrade which I've never attempted before, so any help would be much appreciated!
We currently have a single-head FAS3020 running a small number of SATA and FC shelves. The head is EOL and so I've been able to persuade my bean counters to buy me a pair of FAS3240 heads to use as an HA pair. We're keeping all the disk shelves, so I "just" need to swap the heads over. From what I've read, it's best practice to upgrade the old head to the version of ONTAP that the new head will run, but we don't have that option as the 3020 won't run ONTAP 8 and the 3240's won't run ONTAP 7! This is our central storage system, using CIFS, NFS and LUNs over FC, so getting it wrong isn't really an option. Is this going to be achievable or should I call professional services in? I'd rather do this myself if possible, not least because PS are rather expensive... Can I just copy the latest ONTAP onto the existing vol0 and shut the head down, power up the new head and make the disks owned by the new head? I assume I'll also have to tell the FC switches about the new WWPNs for the LUNs to work. Will that work or will I end up with a very large, very expensive brick?
Thanks! Simon. _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
On 18 Jan 2012, at 23:19, Sto Rage© netbacker@gmail.com wrote:
Simon, Quick question. Did the new FAS3240 pair come with new disk shelves? If not, how do you plan to distribute the old shelves across the two heads since you are going from a single head to a clustered pair. Each head needs its own root volume and spare disk(s).
Good question! No there are no new disk shelves - I'd planned to swap one head in first, using the existing root vol, and keeping the shelf layout as is, then add the second head afterwards, but it hadn't occured to me that I'll need a second root vol. As I have both SATA and FC shelves, I was expecting one head to be "master" for each disk type, with failover to the other, so I guess the root vols will be one on each?
Simon
On 19/01/2012, at 10:34 AM, Simon Ogilvie wrote:
Good question! No there are no new disk shelves - I'd planned to swap one head in first, using the existing root vol, and keeping the shelf layout as is, then add the second head afterwards, but it hadn't occured to me that I'll need a second root vol. As I have both SATA and FC shelves, I was expecting one head to be "master" for each disk type, with failover to the other, so I guess the root vols will be one on each?
This will be tricky. Under an active/active cluster, the disks have to have software ownership enabled, and each disk (not shelf) is owned by one of the two controllers. Chances are that your old system uses hardware-based ownership, the two are not compatible though it is possible to convert between them.
You certainly want a good, accessible, backup of all of your data before attempting to do any of this. You will be doing tricky things in maintenance mode, with mistakes being fatal to your data.
It may be worth considering renting a shelf or two so you can set up the second controller on that, then migrating the data back to the shelves you own. You will also need to know a lot more about OnTAP than a "typical" NetApp administrator might.
Professional Services could well be worth the cost...
This will be tricky. Under an active/active cluster, the disks have to have software ownership enabled,
That is not quite correct, sorry. Active/active cluster existed long before software based disk ownership was introduced and software based disk ownership is used for standalone systems as well.
Is it true that with recent enough Data ONTAP only software based disk ownership is supported.
Forgive nitpicking ;)
We see these a handful of times per day, where the count is 1 or 2:
Jan 6 19:50:29 toaster-a-svif1 [tungsten-a: kern.syslog.drops:warning]: Dropped 1 syslog messages starting at Wed Jan 6 19:50:29 PST due to lack of internal log buffers
During incidents (head failovers), the issue becomes worse:
Jan 10 12:59:46 toaster-b-svif1 [toaster-b (takeover): kern.syslog.drops:warning]: Dropped 1886 syslog messages starting at Tue Jan 10 12:59:10 PST due to lack of internal log buffers
We log at severity 6, i.e. Info. Is there a way to increase internal log buffers? I use 'info' level messages to analyze problems, so I'd rather not decrease the severity threshold.
I expect the answer is 'no' ... does anyone have a work-around for this issue?
--sk
Stuart Kendrick FHCRC
If you have spares, you could create a 2 or 3 disk aggr for root vol on 2nd head.
If you have multiple aggregates and software ownership - you could 'assign' the aggregate to the other head and create the root vol on it.
Jack Sent from my Verizon Wireless BlackBerry
-----Original Message----- From: Simon Ogilvie simon.ogilvie@gmail.com Sender: toasters-bounces@teaparty.net Date: Wed, 18 Jan 2012 23:34:22 To: Sto Rage©netbacker@gmail.com Cc: toasters@teaparty.nettoasters@teaparty.net Subject: Re: Head swap
On 18 Jan 2012, at 23:19, Sto Rage© netbacker@gmail.com wrote:
Simon, Quick question. Did the new FAS3240 pair come with new disk shelves? If not, how do you plan to distribute the old shelves across the two heads since you are going from a single head to a clustered pair. Each head needs its own root volume and spare disk(s).
Good question! No there are no new disk shelves - I'd planned to swap one head in first, using the existing root vol, and keeping the shelf layout as is, then add the second head afterwards, but it hadn't occured to me that I'll need a second root vol. As I have both SATA and FC shelves, I was expecting one head to be "master" for each disk type, with failover to the other, so I guess the root vols will be one on each?
Simon _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
Having done this process, and considering you didn't take into account the fact the 2nd head will need it's own root volume, I'd say you should engage PS for this. Any number of steps in the process will be potentially data destroying.
On 18 Jan 2012, at 23:19, Sto Rage© netbacker@gmail.com wrote:
Simon, Quick question. Did the new FAS3240 pair come with new disk shelves? If not, how do you plan to distribute the old shelves across the two heads since you are going from a single head to a clustered pair. Each head needs its own root volume and spare disk(s).
Good question! No there are no new disk shelves - I'd planned to swap one head in first, using the existing root vol, and keeping the shelf layout as is, then add the second head afterwards, but it hadn't occured to me that I'll need a second root vol. As I have both SATA and FC shelves, I was expecting one head to be "master" for each disk type, with failover to the other, so I guess the root vols will be one on each?
Simon
You could always "split" your disks at the aggregate level. I would hope that you have separated the FC disks into at least one aggregate and the SATA drives into another.
(very abbreviated version here!!) You could bring all the disks onto one of the heads, get it up and running. Create an appropriate sized root volume on the the aggregate that the current root volume is not on. Go into maintenance mode and remove ownership of those disks containing the aggregate with the new root volume and then bring them into the second head.
Again, this is very abbreviated, but the idea should work.
--tmac Tim McCarthy Principal Consultant
RedHat Certified Engineer 804006984323821 (RHEL4) 805007643429572 (RHEL5)
On Wed, Jan 18, 2012 at 8:43 PM, Andrew Werchowiecki Andrew.Werchowiecki@xpanse.com.au wrote:
Having done this process, and considering you didn't take into account the fact the 2nd head will need it's own root volume, I'd say you should engage PS for this. Any number of steps in the process will be potentially data destroying.
On 18 Jan 2012, at 23:19, Sto Rage© netbacker@gmail.com wrote:
Simon, Quick question. Did the new FAS3240 pair come with new disk shelves? If not, how do you plan to distribute the old shelves across the two heads since you are going from a single head to a clustered pair. Each head needs its own root volume and spare disk(s).
Good question! No there are no new disk shelves - I'd planned to swap one head in first, using the existing root vol, and keeping the shelf layout as is, then add the second head afterwards, but it hadn't occured to me that I'll need a second root vol. As I have both SATA and FC shelves, I was expecting one head to be "master" for each disk type, with failover to the other, so I guess the root vols will be one on each?
Simon
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