toasters

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13514 discussions

RE: Raid groups
by Mohler, Jeff 04 May '00

04 May '00

Question: Why would you have one large raid group? Your mathematical chances of losing the entire volume from a 2-drive failure are astonomically higher than if you use smaller RG's, it will also take ages longer to rebuild a failed drive in that large of a RG instead of a small(er) one. Also consider that the small raid group will be a 'bottleneck' or sorts. Its my understanding that every CP (consistency point) that is written, round-robins thru all available Raid Groups (RGs) in a volume. As I see it, that helps balance the data for when you want to read it back from disk helping to minimize head-seek times. X amount of data will take less time and disk revolutions to write out on the large RG, but -may- take multiple disk revolutions to complete on the small RG..and extend to the length of time it would take to read the data as well. All things being equal, equal sized RGs would offer a more consistent performer. A balanced set of RGs will serve you better in the long run. -----Original Message----- From: Sateesh Mucharla [mailto:sateesh@ampere.nsc.com] Sent: Thursday, May 04, 2000 12:21 PM To: toasters(a)mathworks.com Subject: Raid groups I am buying a F760 with 35 drives (all 36GB). As there is limitation of 28 drives per raid group ( i read it NetApp Sysadmin manual), i am thinking of having two raid groups one with 26 and the other with 7 drives. Rest two will be hot spares. But i am open for better configuration. I would like to know whether i can configure all 33 drives into one raid group - Is that possible? If so what are the disadvantages. (With 33 drives in one raid group, i loose only one drive as a parity drive - this is an advantage). Can somebody suggest a better configuration ? Thanks Sateesh Mucharla National Semiconductors

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RE: raid failure
by Mohler, Jeff 04 May '00

04 May '00

I'd prefer either to have the tools myself, or only hear back if something was amiss. The danger with getting regular "everything is ok" type emails is that you could fail to notice an email informing you of a potential problem. --- Someone correct me if Im wrong.. But if you are properly registered on NOW with all of your filer serial numbers, you WILL be notified if something is amiss that requires NetApp action. When the case is opened against ASUP Email, you get an Email about a new case thats opened with you as the owner of the hardware in question.

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Re: raid failure
by Richard L. Rhodes 04 May '00

04 May '00

On 3 May 2000, at 21:21, Robert L. Millner wrote: > mistake to have been. Was my mistake not buying an EMC or a Sun in the > first place or was my mistake not noticing the autosupport message (for > example)? We have some big EMC systems - they aren't perfect either! I've had: - databases crash due to scsi bus errors that emc couldn't explain (it was an emc problem, the same exact scsi error occured on several systems at the exact same time) - 30 min outages for microcode updates that turned into 4 hours - lost a 4 port scsi board in the emc box taking systems down Our emc sales rep insists that they've never lost data. Maybe . . . but I don't see where it's any less vulnerable to double- disk failures than any other raid system. Rick

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Re: Data OnTap 5.3.5P2 and NDMP Backups
by Moshe Linzer 04 May '00

04 May '00

Pablo, I am seeing the same problem with Budtool 4.6.1a (and previously with 4.6). Budtool support is claiming that it is a hardware issue. They insisted I install OnTap 5.3.5, which is certified with 4.6.1a, but this did not solved the problem. After discussion with NetApp, and reading some of the recent posts here, I am going to 5.3.5R2P2, which is supposed to fix various NDMP problems. We are using a Breece Hill Q2.15 with 2 DLT7000 drives. The error I receive in the budtool log is: 04/27/00 23:38:39> Unload volume : B0113 04/27/00 23:40:02> ------------------------------------------------------------------ 04/27/00 23:40:02> ------ W A R N I N G ------- 04/27/00 23:40:02> Close Volume B0113 failed: Error 0 04/27/00 23:40:02> This failure, by itself, does not mean that the volume 04/27/00 23:40:02> or any of the data already on the volume is unusable. 04/27/00 23:40:02> ------------------------------------------------------------------ Then I have to manually eject the disk from the drive. I will write back if the new OnTap version helps. Moshe >From owner-toasters(a)mathworks.com Thu May 4 03:42:40 2000 >Date: Wed, 3 May 2000 17:17:05 -0500 (CDT) >From: Paul Mikulencak <paul.mikulencak(a)amd.com> >To: "Linn, Greg" <Greg.Linn(a)netapp.com> >Cc: "'toasters(a)mathworks.com'" <toasters(a)mathworks.com> >Subject: Re: Data OnTap 5.3.5P2 and NDMP Backups >Mime-Version: 1.0 >Precedence: bulk > > >On Wed, 3 May 2000, Linn, Greg wrote: > >> A NDMP-based backup problem has been identified in our Data OnTap 5.3.5P2 patch >> release. >> >> During development of Data OnTap 5.3.6, a deadlock condition was discovered >> which impacted the NDMP Java implementation. This condition typically manifests >> itself as an NDMP connection failure during resource depletion conditions. We >> believe it was first introduced 5.3.5P2. The problem has been resolved in >> 5.3.5R2P2 and in the forthcoming 5.3.6 release. >> >> If you are running 5.3.5P2, and are experiencing NDMP backup problems similar to >> the connection failure described above, we recommend that you upgrade to >> 5.3.5R2P2. > > >greg (and all), > > >i'd appreciate a pointer to a description of the "problem" in detail. > >we're wrestling with something here that i've been assuming was a hardware >problem on our storagetek 9740 tape changer, but which hasn't responded >to anything i or the storagetek field engineer have tried. > >our backups (budtool, 4.6.1, with the jumbo patch, dlt7000 drives scsi >attached to each F760 filer) have been failing because fully written >tapes are incompletely ejected from their drives. > >nothing in the messages file on either the budtool host or the netapps in >question. tape drives have been replaced (for one filer, three times), >and we even replaced the robotic hand. manual loading and unloading of >tapes via the storagetek touch panel work without failure. sysconfig -t >always shows the drives it should, and budtool always sees them. > >i have a hard time laying this at the feet of the particular revision of >data ontap we're running (currently 5.3.5R2P1, formerly 5.3.4R2), but >most of the hardware angles have been explored. i've been reading >messages on the toasters list that indicates that a bunch of folks are >having problems with their backups, but nothing quite like what we're >experiencing. > >anyone have any feedback? > > >pablo > > >email paul.mikulencak(a)amd.com >ext. 602-2448 "the word pessimism bothers me >pager 624-0929 because it is often used instead >cube 3.277.042 of the word lucidity." > > robert bresson > > ----------------------------------------------------------------------------- Moshe Linzer | Mastery of Unix offers real freedom. Unix Systems Manager | The price of freedom is always dear, but National Semiconductor, Israel | I'd rather pay for my freedom than live in Phone: 972-9-970-2247 | a bitmapped, pop-up-happy dungeon like NT. Fax: 972-9-970-2001 | Email: moshel(a)nsc.com | - Thomas Scoville, Unix Review -----------------------------------------------------------------------------

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Veritas
by Shaw, Kevin 04 May '00

04 May '00

I'm looking at dropping Legato and purchasing Veritas for my backups. What are the pros and cons of Veritas? How is Veritas service and support? Is there a better enterprise backup solution? Thanks in advance.

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RE: Network Appliance Upgrade to ONTAP 5.3.4R3P2 and Backups
by Moshe Linzer 04 May '00

04 May '00

Budtool has certified Budtool 4.6.1a in combination with OnTap 5.3.5. Unfortunately, NetApp says that 5.3.5 is buggy and recommends a patched release, which is not certified by Budtool. 5.3.5P2 did not work for me, because of the NDMP problems referred to in many emails (Budtool could not connect to NDMP on filer). 5.3.5R2P2 is SUPPOSED to fix those problems, and I will be testing that release today. Moshe >From owner-toasters(a)mathworks.com Tue May 2 21:28:08 2000 >Date: Tue, 2 May 2000 11:21:02 -0500 (CDT) >From: Jay Orr <orrjl(a)stl.nexen.com> >To: toasters(a)mathworks.com >Subject: RE: Network Appliance Upgrade to ONTAP 5.3.4R3P2 and Backups >MIME-Version: 1.0 >Precedence: bulk > > >Anyone know if budtool is keeping up? I've been pondering about upgrading >our F330's to 5.3.5r2 ..... > >On Tue, 2 May 2000, Kelly Wyatt wrote: > >> Keep in mind that VERITAS currently has no plans to qualify any 5.3.5 release. If you are concerned about keeping NetBackup and ONTAP in a supported mode you need to be at 5.3.4 (qualified). (They are currently qualifying 5.3.4R2 per email I received from VERITAS support. >> >> Kelly >> >> >> -- >> >> Kelly Wyatt, Kelly.Wyatt(a)SAS.com >> Systems Programmer >> Integrated Solutions Consulting >> SAS Institute Inc. / SAS Campus Drive / Cary, NC 27513 >> http://www.sas.com >> The power to know TM >> >> >> >> >> -----Original Message----- >> From: Micheler Klaus (MDCA Villach) [mailto:Klaus.Micheler@infineon.com] >> Sent: Tuesday, May 02, 2000 2:10 AM >> To: 'toasters(a)mathworks.com'; 'Kelly.Wyatt(a)sas.com'; 'armijo(a)cs.unm.edu' >> Subject: RE: Network Appliance Upgrade to ONTAP 5.3.4R3P2 and Backups >> >> >> >> On Thu, Apr 20, 2000 at 11:37:35AM -0400, Kelly Wyatt wrote: >> >> We upgraded out filers to NetApp Release 5.3.4R3P2 this weekend. Since >> then, NBU 3.2 keeps downing the tape drives on >> several, but not all of the filers (3 of 9). This seems to happen before, >> during and after backups. >> >> >> >> Has anyone else seen this? Thanks!! >> >> >we saw this on previous versions of NBU, 3.1.*, the work around was really >> >> >lame. cron executed a script which did something like: vmoprcmd -up # for >> >each drive. >> >> Hi there! >> >> We also have the same problem with this release of Ontap and Netbackup v3.2. >> According to Netapp the cause of this problem is a faulty Java Class >> (Garbage collection) which NDMP uses. >> This should also be the reason for the problems with Ontap 5.3.5xxx, where >> the problem got critical and backup stopped working. >> >> Netapp recommended us to switch to Ontap 5.3.5R2P1, where the NDMP-BUG is >> (hopefully) fixed. >> >> regards, Klaus Micheler >> Infineon Technologies DC >> > >----------- >Jay Orr >Systems Administrator >Fujitsu Nexion Inc. >St. Louis, MO > ----------------------------------------------------------------------------- Moshe Linzer | Mastery of Unix offers real freedom. Unix Systems Manager | The price of freedom is always dear, but National Semiconductor, Israel | I'd rather pay for my freedom than live in Phone: 972-9-970-2247 | a bitmapped, pop-up-happy dungeon like NT. Fax: 972-9-970-2001 | Email: moshel(a)nsc.com | - Thomas Scoville, Unix Review -----------------------------------------------------------------------------

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RE: Data OnTap 5.3.5P2 and NDMP Backups
by Linn, Greg 04 May '00

04 May '00

Paul, I doubt that the 5.3.5P2 NDMP problem could account for the incomplete tape eject condition you described. Symptoms of the 5.3.5P2 problem are that NDMP on the filer deadlocks and stops responding to network requests from the backup application. This condition can be verified by attempting to telnet to the NDMP port (10K) on the filer. -Greg -----Original Message----- From: Paul Mikulencak [mailto:paul.mikulencak@amd.com] Sent: Wednesday, May 03, 2000 3:17 PM To: Linn, Greg Cc: 'toasters(a)mathworks.com' Subject: Re: Data OnTap 5.3.5P2 and NDMP Backups On Wed, 3 May 2000, Linn, Greg wrote: > A NDMP-based backup problem has been identified in our Data OnTap 5.3.5P2 patch > release. > > During development of Data OnTap 5.3.6, a deadlock condition was discovered > which impacted the NDMP Java implementation. This condition typically manifests > itself as an NDMP connection failure during resource depletion conditions. We > believe it was first introduced 5.3.5P2. The problem has been resolved in > 5.3.5R2P2 and in the forthcoming 5.3.6 release. > > If you are running 5.3.5P2, and are experiencing NDMP backup problems similar to > the connection failure described above, we recommend that you upgrade to > 5.3.5R2P2. greg (and all), i'd appreciate a pointer to a description of the "problem" in detail. we're wrestling with something here that i've been assuming was a hardware problem on our storagetek 9740 tape changer, but which hasn't responded to anything i or the storagetek field engineer have tried. our backups (budtool, 4.6.1, with the jumbo patch, dlt7000 drives scsi attached to each F760 filer) have been failing because fully written tapes are incompletely ejected from their drives. nothing in the messages file on either the budtool host or the netapps in question. tape drives have been replaced (for one filer, three times), and we even replaced the robotic hand. manual loading and unloading of tapes via the storagetek touch panel work without failure. sysconfig -t always shows the drives it should, and budtool always sees them. i have a hard time laying this at the feet of the particular revision of data ontap we're running (currently 5.3.5R2P1, formerly 5.3.4R2), but most of the hardware angles have been explored. i've been reading messages on the toasters list that indicates that a bunch of folks are having problems with their backups, but nothing quite like what we're experiencing. anyone have any feedback? pablo email paul.mikulencak(a)amd.com ext. 602-2448 "the word pessimism bothers me pager 624-0929 because it is often used instead cube 3.277.042 of the word lucidity." robert bresson

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Veritas Netbackup woes?
by jmiddlebrooks＠datalink.com 04 May '00

04 May '00

Anybody seen Netbackup Status codes 99 when using Veritas Netbackup NDMP to back up your filer? I am consistantly getting Status code 99. I have a HP master server and I am running Ontap 5.3.4r2 on my F760 which has four drives attached to it, two off the onboard SCSI port and two off a second SCSI card in the Filer. What path do you use within Netbackup and are there any special attributes I should use? Anything special to put in the bp.conf? What is the best version of Ontap to run that has no Netbackup bugs? I have installed and used NDMP with a SUN master server several times and not experienced any problems. This is my only experience with a HP master and I am having no luck getting backups to be successfull all the time. I know these sound like Veritas questions but I was just curious as to what actual users are doing with success. Thanks in advance Jason Middlebrooks Systems Engineer Datalink Corp. 888-933-9327 x2970

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Re: raid failure
by Robert L. Millner 03 May '00

03 May '00

"AT" == Aiello, Tony <Tony.Aiello(a)netapp.com>: "GDG" == G D Geen <geen(a)msp.sc.ti.com>: AT> As of the 5.3.2 release we added functionality to reassign blocks as they AT> occur. Prior to that we enabled automatic reassignment features on the disk AT> drives to do this. We found that the disks did not handle the reassignment AT> in all cases we'd like so we took control of that function. That would be The fact that whatever version this customer was running was not able to handle that common type of disk failure scares the hell out of me for what 5.3.5R2P1 will not be able to handle and how it will bite me when something breaks. Why didn't this make it in to ONTAP before something as useless as the Java GUI (ok, thats a personal opinion; but try and convince me that its worth more than the ability to appropriately handle disk failures). Netapp had years of experience from other vendors to draw from when it was formed. Part of that experience should have been comprehensive knowledge of the kinds of failures people see in the field. GDG> First and foremost, I take complete responsibility for my filers. I did so GDG> in my message to my management which was forwarded up through VP level. Of course, and there's always more that can be done at everyone's end. There's a long list of things I'd like to both do and see Netapp do. Important problems that vendors missed in their own tests make me really worry for that vendor's Q/A and what a product will cost me later when something pathological happens (after all, that's part of the cost of running the box). Nobody gets everything right immediately and that includes Netapp. Nobody's server is perfect for my environment. Everything is a balance of costs and some of those costs are how well it works on its own. What they miss has alot to do with what I consider my mistake to have been. Was my mistake not buying an EMC or a Sun in the first place or was my mistake not noticing the autosupport message (for example)? GDG> Having said that, I do agree with you. This disk should have failed by the GDG> filer two weeks prior. We at TI are now pushing NetApp to be proactive in We have been discussing certain things we'd like to see in their product as well (in case any one is curious I can elaborate more here). GDG> I still prefer to look at the autosupport messages. There is so much that I GDG> glean from these. The information is not just what disks to watch out for Everything in the autosupport messages can be gleaned from commands you run on the filer and checking the logs. I'd be really interested in hearing what kinds of tools you are working on if you don't mind sharing that info. GDG> I cannot disclose what fifteen hours of down time cost Texas Instruments, GDG> Inc. as that is proprietary information though we were fortunate that this GDG> was over a holiday weekend. *shiver* Rob

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Data OnTap 5.3.5P2 and NDMP Backups
by Linn, Greg 03 May '00

03 May '00

A NDMP-based backup problem has been identified in our Data OnTap 5.3.5P2 patch release. During development of Data OnTap 5.3.6, a deadlock condition was discovered which impacted the NDMP Java implementation. This condition typically manifests itself as an NDMP connection failure during resource depletion conditions. We believe it was first introduced 5.3.5P2. The problem has been resolved in 5.3.5R2P2 and in the forthcoming 5.3.6 release. If you are running 5.3.5P2, and are experiencing NDMP backup problems similar to the connection failure described above, we recommend that you upgrade to 5.3.5R2P2. Greg Linn Manager, NDMP Development linn(a)netapp.com 408.822.3752 telephone 408.822.4457 fax

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