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R: Is there's a way to remove and reassign a disk?
by Milazzo Giacomo 27 Nov '10

27 Nov '10

Thanks all for answers. They're quite what I was thinking about "physics" :) Also if I could use "fail/unfail" the raid group I operate is always the same...so that I could remove a disk from it but this last want back a disk :) And all this stuff for the customer is worried about the overall performances. He's got now three rg, the first with 20, the second with 26 and the last with 6 disks and he's concerned about performances gave by the smaller rg influencing all the aggregate... Da: Davin Milun [mailto:davin.milun@gmail.com] Inviato: sabato 27 novembre 2010 14:55 A: Milazzo Giacomo Cc: toasters(a)mathworks.com Oggetto: Re: Is there's a way to remove and reassign a disk? No - you're stuck with your raidgroup configuration, short of destroying the aggr. If it really was just a specific incorrect DISK that was used, and you wanted to use another, you could use "disk replace" to do that - but that won't let you change raidgroup layout. Davin. On Sat, Nov 27, 2010 at 5:17 AM, Milazzo Giacomo <G.Milazzo(a)sinergy.it<mailto:G.Milazzo@sinergy.it>> wrote: Hi all, In my experience I think is not possibile but a customer of mine has this issue. He wanted to extend the two raid group of his aggregate but once increased the raid group size he forgot to use the syntax: >aggr add -d x.y -g raidgroup name So the last raid group has been extended and another raid group has been created with only 5 disks... He asked me how to go back and my answer is: "Copy the data, destroy the aggr and recreate it..." :) But I remember that times ago a customer of mine used the "disk fail" command just to try it and (not sure on syntax) he was able to "unfail" the disk. So, what, for this case, if "disk fail" is used to fail the disk, rebuild its data on a spare, the unfail the failed, zeroed and manually assigned to the right raid group? Dott. Giacomo Milazzo [cid:image001.jpg@01CB8E48.29D11970] Technical Account Manager Sinergy SpA Filiale di Roma * 00198. viale Regina Margherita, 269 ' (+39) 3406001045 0644245272 7 (+39) 0226922048 * Giacomo.Milazzo(a)Sinergy.it

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Is there's a way to remove and reassign a disk?
by Milazzo Giacomo 27 Nov '10

27 Nov '10

Hi all, In my experience I think is not possibile but a customer of mine has this issue. He wanted to extend the two raid group of his aggregate but once increased the raid group size he forgot to use the syntax: >aggr add -d x.y -g raidgroup name So the last raid group has been extended and another raid group has been created with only 5 disks... He asked me how to go back and my answer is: "Copy the data, destroy the aggr and recreate it..." :) But I remember that times ago a customer of mine used the "disk fail" command just to try it and (not sure on syntax) he was able to "unfail" the disk. So, what, for this case, if "disk fail" is used to fail the disk, rebuild its data on a spare, the unfail the failed, zeroed and manually assigned to the right raid group? Dott. Giacomo Milazzo [cid:image001.jpg@01CB8E24.49A29630] Technical Account Manager Sinergy SpA Filiale di Roma * 00198. viale Regina Margherita, 269 ' (+39) 3406001045 0644245272 7 (+39) 0226922048 * Giacomo.Milazzo(a)Sinergy.it

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GBIC question
by David McWilliams 23 Nov '10

23 Nov '10

We purchased a new FAS2020 and we didn't order a GBIC at the same time, we now want to connect to a FCAL tape drive. Can I use a standard GBIC or do I have to get one from NetApp? Sláinte, David "Build a man a fire he'll be warm for a day, set a man on fire and he'll be warm for the rest of his life" <http://en.wikipedia.org/wiki/Discworld> - Terry Pratchett <http://en.wikipedia.org/wiki/Terry_Pratchett> Checkout my photos - http://www.panoramio.com/user/1113507

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RE: NDMP backup of snapmirror target
by Kennedy, Jeffrey 23 Nov '10

23 Nov '10

I would be very interested to hear from Netapp contributors if NDMP backups of volume snapmirror's has changed. My education at the time was that volume level snapmirror's are RO for all blocks, which means inode pointers could not change since that meant a change to blocks *in* the volume. QSM/Snapvault has never suffered from this issue. Jeff Kennedy Qualcomm, Incorporated QCT Engineering Compute 858-651-6592 From: Jeremy Webber [mailto:Jeremy.Webber@al.com.au] Sent: Sunday, November 21, 2010 6:22 PM To: Kennedy, Jeffrey Cc: Jeremy Webber; Fred Grieco; toasters(a)mathworks.com Subject: Re: NDMP backup of snapmirror target Maybe there were limitations in earlier versions of OnTAP but I can confirm that we do tape backups, via tape, from a snapmirror destination without having to break the snapmirror relationship. A snapshot is automatically created in the snapmirror destination for the duration of the NDMP job. I can't recall if subsequent snapmirror updates fail during the backup and am not able to test this right now. OnTAP 7.3.2. -jeremy On 17/11/2010, at 6:11 AM, Kennedy, Jeffrey wrote: Things may have changed in OT since I last was concerned with tape backups but as I recall a snapmirrored *volume* can't take the backup snapshot because it's RO. So you point the backup software at the newest snapshot in the RO volume and back up that view. The only reason the NDMP backup makes a snapshot is to guarantee consistency. An existing snapshot already has that. Jeff Kennedy Qualcomm, Incorporated QCT Engineering Compute 858-651-6592 From: owner-toasters(a)mathworks.com<mailto:owner-toasters@mathworks.com> [mailto:owner-toasters@mathworks.com] On Behalf Of Fred Grieco Sent: Tuesday, November 16, 2010 6:26 AM To: toasters(a)mathworks.com<mailto:toasters@mathworks.com> Subject: NDMP backup of snapmirror target I am snapmirroring several volumes to a DR site, and I would like to do tape backups at that site. How should I do them? Can I use NDMP? It seems like I can't do straight NDMP because the replicated target is read-only. I am currently creating flexclones from snapshots existing in the volume (nightly.0...) but flexclone then locks this snapshot and snapmirror will fail to update ( I'm not sure if this happens at the next update or when the source system attempts to remove that snapshot and copy it over... I wasn't watching). What do you generally do to get snapmirrored volume data to tape? TIA, Fred -- Jeremy Webber Senior Systems Engineer Animal Logic Pty Ltd T: +61 2 9383 4837 F: +61 2 9383 4801

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How to design for iops?
by Kennedy, Jeffrey 23 Nov '10

23 Nov '10

Let me first define iops in this case. Metadata operations with a larger percentage of writes than reads. I have a group that will regularly drive 60-70k metadata operations per second that consist of updates more than half the time. 10Gb and PAM cards will help with reads but the writes are the killer. Today they are on shared 6070's with both PAM and 10Gb. I'm using PA to see the "other ops" which is where I got the 60-70k number. It doesn't break out read v write for metadata but based on 'sysstat' I got the over-half-write info. When they ramp up everyone else on that filer feels it. Is there something that can be done to improve this other than isolating them? Thanks. Jeff Kennedy Qualcomm, Incorporated QCT Engineering Compute 858-651-6592

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Measuring IOPS
by Davies, Matt 18 Nov '10

18 Nov '10

Hi all, Does anyone know if there is a way to calculate the number of IOPS a filer is handling via SNMP or some way to script a collection ? Thanks Matt ____________________________ Matt Davies Director of International IT Operations General Atlantic 23 Savile Row London W1S 2ET Tel: +44 207 484 3203 Fax: +44 207 484 2803 Mobile: +44 777 559 4265 ____________________________ ________________________________ _____________________________________________________________ This e-mail (including all attachments) is confidential and may be privileged. It is for the exclusive use of the addressee only. If you are not the addressee, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please erase all copies of the message and its attachments and notify us immediately at help(a)generalatlantic.com . Thank You.

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NDMP backup of snapmirror target
by Fred Grieco 16 Nov '10

16 Nov '10

I am snapmirroring several volumes to a DR site, and I would like to do tape backups at that site. How should I do them? Can I use NDMP? It seems like I can't do straight NDMP because the replicated target is read-only. I am currently creating flexclones from snapshots existing in the volume (nightly.0...) but flexclone then locks this snapshot and snapmirror will fail to update ( I'm not sure if this happens at the next update or when the source system attempts to remove that snapshot and copy it over... I wasn't watching). What do you generally do to get snapmirrored volume data to tape? TIA, Fred

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Moving netapp hardware to different racks
by Steve Losen 20 Oct '10

20 Oct '10

Greetings Toasters, Please bear with me, I'm not an electrician. We are constructing a new data center and we are standardizing our racks and the power feeding them. We plan to move some netapp hardware to the new data center, which is currently installed in netapp cabinets where each cabinet is powered by 4 240V 30 amp circuits. The racks in the new data center will be powered by 6 120V 20 amp circuits each. That is less power than we have in our netapp cabinets, but we can simply put less equipment in the new racks if necessary. I am pretty sure that this will not cause us any problems. We already have several FAS2050 controller pairs and DS14MK2 disk shelves installed in non-netapp racks plugged into 120V outlets. Can FAS6040 and FAS3170 heads be plugged into 120V ? (I will double check the hardware specs.) We could move the netapp cabinets to the new data center, but then we need to reserve floor space for the cabinets and run 240V circuits to them. We would rather use the new standard racks/power. Steve Losen scl(a)virginia.edu phone: 434-924-0640 University of Virginia ITC Unix Support

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FAS2050 adding 2 x DS14mk2 (ESH2) shelves
by John Stoffel 12 Oct '10

12 Oct '10

Hi all, We're planning on adding a pair of DS14mk2 ESH2 shelves to a FAS2050 running 7.2.6.1P8 and we're wondering if there are any gotchas we need to worry about? The disks are 300F ones. Neither of the two FC ports (0a & 0b) are currently in use. I think we're all set hardware wise, though we might need to do firmware upgrades. I know I'll need to assign the disks to the system once it boots up with them attached, and such like that. Thanks, John John Stoffel - Senior Staff Systems Administrator - System LSI Group Toshiba America Electronic Components, Inc. - http://www.toshiba.com/taec john.stoffel(a)taec.toshiba.com - 508-486-1087

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/vol/vol0/etc permissions
by Kevin Sheen 06 Oct '10

06 Oct '10

Hi all, We have a new filer running ontap 7.3.3. We normally nfs export the /vol/vol0 to a select few hosts in order to do management on the filers (just the few things that filer view / system manager don't do well). I can't seem to do it on this new filer. filer3> exportfs /vol/vol0/home -sec=sys,rw,nosuid /vol/vol0 -sec=sys,rw=ewsapps,root=ewsapps I can do the following: ewsapps:root:/ $mount filer3:/vol/vol0 /mnt ewsapps:root:/ $cd /mnt ewsapps:root:/mnt $ls -al total 58 drwxrwxrwx 6 root root 4096 Oct 6 11:21 . drwxr-xr-x 39 root root 1024 Oct 2 17:30 .. dr-------- 2 root root 4096 Oct 6 09:46 .ha drwxrwxrwx 10 root root 4096 Oct 6 08:00 .snapshot drwx------ 28 root root 12288 Oct 6 11:20 etc drwxrwxrwt 3 root root 4096 Jun 7 11:19 home ewsapps:root:/mnt $cd etc ksh: etc: permission denied ewsapps:root:/mnt $mkdir test ewsapps:root:/mnt $cd test ewsapps:root:/mnt/test $cd .. ewsapps:root:/mnt $rmdir test ewsapps:root:/mnt $touch test ewsapps:root:/mnt $rm test ewsapps:root:/mnt $ls -al total 58 drwxrwxrwx 6 root root 4096 Oct 6 11:29 . drwxr-xr-x 39 root root 1024 Oct 2 17:30 .. dr-------- 2 root root 4096 Oct 6 09:46 .ha drwxrwxrwx 10 root root 4096 Oct 6 08:00 .snapshot drwx------ 28 root root 12288 Oct 6 11:20 etc drwxrwxrwt 3 root root 4096 Jun 7 11:19 home ewsapps:root:/mnt $cd etc ksh: etc: permission denied ewsapps:root:/mnt $chmod 755 etc chmod: WARNING: can't change etc I've looked at options nfs, options cifs on the filer. Can't see anything that stands out as would prevent me from changing etc. I've done searches on NOW and google but nothing jumps out. Anyone seen this? thanks, Kevin

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