toasters November 2007

toasters@lists.teaparty.net

61 participants
44 discussions

iSCSI question
by David McWilliams 29 Nov '07

29 Nov '07

Is there a requirement for the volume that contains an iSCSI LUN to have a minimum amount of free space. We seem to be getting warnings when it approaches 90% full. Is it a modifiable parameter? -- Sláinte, David Get a safer, faster, better web browser @ http://www.mozilla.org/products/firefox/

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Re: Can you allocate space from one aggregate to a volume on another?
by Robert Lazzurs 23 Nov '07

23 Nov '07

Widelinks look very cool, sadly the only data on this volume are LUN's. On Nov 23, 2007 2:01 PM, Agnew, Blaine <Blaine.Agnew(a)netapp.com> wrote: > Have you checked out widelinks? > > In certain circumstances I have used these to make data appear to be in > one volume when in fact it existed in others. I think you would need NFS > enabled in order to use this conveniently. > > Blaine > > > -----Original Message----- > From: Holland, William L [mailto:HollandWL@state.gov] > Sent: Friday, November 23, 2007 7:52 AM > To: Robert Lazzurs; toasters(a)mathworks.com > Subject: RE: Can you allocate space from one aggregate to a volume on > another? > > You can use snapmirror to migrate the volume to a new aggregate. When > you are ready to make the final cutover, rename the original volume then > rename the new volume to match the original volume name. You will also > need to move your CIFS shares (if you have any). Then you can grow the > new volume to the size you need. This will be a minimal disruption to > users and transparent as far as their applications, etc are concerned. > > -----Original Message----- > From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] > On Behalf Of Robert Lazzurs > Sent: Friday, November 23, 2007 6:55 AM > To: toasters(a)mathworks.com > Subject: Re: Can you allocate space from one aggregate to a volume on > another? > > Is there any way this can be done that is fully transparent to the end > users of the storage. > > We have a similar situation and while we will be moving to GX in the > long term this is not something that can be done in the short term and > we are fast running out of space on our original aggr. > > If a volume cannot be moved to another aggr without the end users > noticing can a LUN be moved to another volume without end users > noticing? > > Kind regards, > > On Nov 15, 2007 4:48 PM, Fox, Adam <Adam.Fox(a)netapp.com> wrote: > > If I understand you correctly, I don't think you can do what you want > > to do. > > It sounds like you want a volume to have space allocated in multiple > > aggregates. > > That won't work. You could copy an entire volume into a new > > aggregate, but you can't have a flex vol span aggregates. At least > > not in ONTAP 7. ONTAP GX can do this, but that's a very different > > configuration and you'd need to work closely with your sales team to > > see if it's appropriate for your environment. > > > > > > -- Adam Fox > > adamfox(a)netapp.com > > > > > > > > -----Original Message----- > > From: Bryano [mailto:Bryan.Price@firstassistinsurance.co.uk] > > Sent: Thursday, November 15, 2007 7:48 AM > > To: toasters(a)mathworks.com > > Subject: Can you allocate space from one aggregate to a volume on > > another? > > > > > > We currently have a fas 940 with the following config: > > > > 3x 144GB FC shelves all but 2 disks are in aggr1 which equates to > > approx 3.9TB useable space which is approx 5.7TB raw (excluding the 2 > > spares) containing 4 volumes > > > > 5x 72GB FC shelves with 8 assigned to aggr2 (60 spares) containing 1 > > volume > > > > We would like to increase the size of aggr1 and therefore plan to > > repalce 2 of the 72GB shelves with 144Gb, 4 of which will be retained > > as spares, thus giving us an extra 3.4TB of raw space to add to aggr1. > > Looking at the system configuration guide for the fas940 it states > > that the max raw aggregate size is 8TB therefore this would take aggr1 > > > over the limit. > > > > Is it possible to create a new aggregate (aggr3) assign the new 144GB > > drives to it but assign the space to the volumes held on aggr1? > > > > As it stands if we were to replace 2 shelves with 144GB drives and > > remove 1 72GB shelf we would have a max size (based on 5x 144GB and 2x > > > 72GB shelves) of 12TB which takes us to the max raw capacity of this > > filer using FC-AL drives. > > > > Thanks > > > > > > -- > > View this message in context: > > http://www.nabble.com/Can-you-allocate-space-from-one-aggregate-to-a-v > > ol > > ume-on-another--tf4811616.html#a13766859 > > Sent from the Network Appliance - Toasters mailing list archive at > > Nabble.com. > > > > >

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san redesign and configuration questions
by Alexander Schalek 23 Nov '07

23 Nov '07

Hi everyone, I have some questions for the experts regarding a SAN configuration. Configuration: FAS3020c MetroCluster (2 sites, 16km distance) 2 FC-Switches on each site, each connected via ISL's to the other location. 1 RHEL ES4 U5 Host on each site with a 4GB QLogic Dual Port HBA. Each FC-Port on each Host is connected to one of the switches FCP enabled and the cf mode is single image Snapdrive for Linux on both Hosts. Following situation: Snapdrive for Linux currently does not support DM-Multipathing on RedHat Linux. We have an open case with Netapp and they are working on the issue to support mulipathing (planned for Q1/08) When I started I setup everything for multipathing because we thought the support for it would be released earlier. I zoned the switches... Zoning: switch1 zone1: 0b(filer1)+0b(filer2)+port0(host1) switch1 zone2: 0b(filer1)+0b(filer2)+port1(host2) switch2 zone1: 0d(filer1)+0d(filer2)+port1(host1) switch2 zone2: 0d(filer1)+0d(filer2)+port0(host2) On the host I implemented DM-MP and use the mpath-Device's to access the LUN's on the cluster. Each mpath-Device consists of 4 sdx-Devices(=the 4 paths to the LUN). Example: mpath0 (360a98000433464706334455142706e33) [size=100 MB][features="1 queue_if_no_path"][hwhandler="0"] \_ round-robin 0 [enabled] \_ 3:0:1:0 sdd 8:48 [active][ready] \_ 4:0:1:0 sdf 8:80 [active][ready] \_ round-robin 0 [enabled] \_ 3:0:0:0 sdc 8:32 [active][ready] \_ 4:0:0:0 sde 8:64 [active][ready] This is working fine. The customer already installed his Oracle RAC on the LUN's/mpath-Device's which where presented to the host's. And here my problem: The customer can not wait until Q1/08 when Snapdrive for Linux supports multipathing on RHEL and I have to redesign the SAN to a single path configuration so SnapDrive is working and supported. My questions: Can I just use the sdx-Devices on the linux host's and leave the zoning and multipathing as it is? Will the cluster failover then work correctly? Or should I deactive multipathing on the hosts and just zone one hba port to one filer fc port and use that sdx-Device? I will have to implement multipathing for sure later when it is supported with linux and snapdrive so I prefer minimum or no changes to the current configuration :) Has anyone experience with such a problem/configuration? Thankful for any tips & hints! Best regards, Alexander -- Alexander Schalek, Technical Services / IT-Infrastruktur Bacher Systems EDV GmbH FN 54202i, Handelsgericht Wien Clemens-Holzmeister-Strasse 4 A-1100 Wien, Business Park Vienna, Austria phone: +43 (1) 60 126-34 | fax: +43 (1) 60 126-4 e-mail: as(a)bacher.at<mailto:as@bacher.at> | web: www.bacher.at<http://www.bacher.at>

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FW Generic Failure
by Michail Michalakis 22 Nov '07

22 Nov '07

Mon Nov 19 12:56:46 EET [esh.bypass.host.port:CRITICAL]: replayed event: [IN] port on channels 0b/UNUSED shelf id 2 ESH B Bypassed due to FW generic fault Does any understand the above message is was found on a FAS270, an the aggregate on this volumes status is online, raid-dp, redirect. I suspect that it is the FAS270 controller and not the ESH Module, because when changing the modules the error remains. All LED on front and back are green.

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Netapp VS Exanet
by Patrick van Helden 20 Nov '07

20 Nov '07

Hi Toaster members, Just wondering what your thoughts are on the topic Netapp VS Exanet Regards, Patrick :working: -- View this message in context: http://www.nabble.com/Netapp-VS-Exanet-tf4846498.html#a13866143 Sent from the Network Appliance - Toasters mailing list archive at Nabble.com.

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sdcli error
by Raj Patel 20 Nov '07

20 Nov '07

Hi all, When I run the following command - C:\Program Files\NetApp\SnapDrive\sdcli.exe snap mount -r mosssqlp1 -k F -s sqlsnap__mosssqlp1__recent -d Q I get the following error - Initializing...Unable to connect to the virtual disk in snapshot. Error : Not enough storage is available to complete this operation. Which is quite different from - Error description: No space left on device. Which is what I get on a full volume - so its completely understandable. The 'Error : Not enough storage is available to complete this operation' would appear to be a red-herring (ie nothing to do with storage or the SAN per se but some oddball way of Windows 2003 telling me theres some other problem. The annoying error seems to indicate a possible rpc problem in Windows rather than with SnapDrive itself. The same script on the same machine will happily mount snaps from other machines for backup purposes and I can't really pinpoint why its not mounting these snaps. If it does turn out to be an rpc issue could it be that the domain account on the server under which SnapDrive runs cannot be validated on this box ? I still haven't got my head around how sdcli talks to the SAN - if I have a backup server mounting snapshots of luns being used on other systems does it need to be able to talk to the system using the luns - why can't it deal direct with the SAN ? Thanks in advance for any tips or toubleshooting suggestions. Cheers, Raj.

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Re: Are disks in FAS2050 expansion shelves software assigned?
by Ramesh, Deepa 16 Nov '07

16 Nov '07

Yes, the FAS2050 uses software based disk assignment. Any additional disks/shelves added to the system will need to be assigned. Details on disk assignment can be found in the Storage Management Guide. Thanks, Deepa -----Original Message----- > From: Stephen C. Losen [mailto:scl@sasha.acc.Virginia.EDU] > Sent: Thursday, November 15, 2007 6:10 AM > To: toasters(a)netapp.com > Subject: Are disks in FAS2050 expansion shelves software assigned? > > > We recently received a FAS2050 (single shelf, active/active) with 20 > 300G SAS disks. I assigned 10 to each head. If we add more SAS disk > shelves will the new disks be software assigned as well? > > I've been looking through NOW and haven't found an answer. > Not much FAS2050 or SAS disk documentation available yet. > > Steve Losen scl(a)virginia.edu phone: 434-924-0640 > > University of Virginia ITC Unix Support >

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Data Ontap NFS and "no root squash"
by Milazzo Giacomo 16 Nov '07

16 Nov '07

Hi all A customer using Linux is asking me how to have an export from a NetApp volume with option "no root squash". I've looked for it on NOW site with no luck The only thing I normally do is to export with anon id=0, rw to some hosts and root to others... Help Thanks in advance

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Thought I'd share
by Glenn Dekhayser 15 Nov '07

15 Nov '07

Had an interesting issue over the weekend at a client, with a happy ending thanks to Netapp support. Client had two aggregates on a 980 controller, one with 144GB drives, one with 300gb drives - each aggr had 1 hot spare, running raid-dp. During the weekend raid scrub, one of the 144gb drives starts popping errors and goes into a predictive failure mode, so the diskcopy starts copying data to the hot 144gb spare. Halfway through this, the predictively bad drive actually fails hard- now it gets interesting. Rather than rebuild the rest of the 144gb hot spare from parity (since it already had much of the data), ontap decided it would abort this diskcopy and pick ANOTHER spare drive to rebuild to- of course the only one left was a 300GB drive, so it picked that one- and instead of right-sizing it down to 144gb, it let it stay at the original size (since you can do that, as Adam Fox reminded us in an earlier post today). So now we had a 144GB aggregate with a single 300GB disk in it, and also, I have no 300GB spares left! Not good. So 1st level support zeroed out the 144gb drive that had the aborted diskcopy on it, and attempted to fail the 300gb drive with a disk fail -f, in order to bring balance back to this world. Didn't work; turns out if there are no spares, you can't do a disk fail on the command line, not even with -f! So the next answer here was to move all the data on the 144GB aggr to another aggr, wipe out the original aggr and rebuild. But of course we didn't have enough space to do that anywhere, so I was going to have to borrow a 300gb shelf from my friendly netapp office to do the trick, and I could see my weekend slowly slipping away. Luckily it didn't come to that; we escalated it up to support. The final answer involved literally yanking the drive, and some other stuff with the disk fail -i command. This started building back to the original 144gb hot spare, and that took care of the issue. The moral of the story - if you end up accidentally recovering to a bigger spare than the rest of your disks in the aggregate, don't despair! Netapp support can help. Also- it's probably a good idea, in mission-critical environments, to have at least TWO hot spares of each size. Glenn (the other one)

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Same aggregate, different size disks?
by Wes Hardin 15 Nov '07

15 Nov '07

Is it possible to have both 144G and 300G disks in the same aggregate, but different raid groups? I can't seem to find any documentation on this. I tried using the ONTAP Simulator to test this, but the simulator seems to have a bug because I was able to add disks of multiple differing sizes to the same raid group (without right sizing them to a common size) and I was even able to add a smaller disk to a raid group of larger disks. -- Wes Hardin

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toasters November 2007