toasters January 2000

toasters@lists.teaparty.net

120 participants
129 discussions

RE: [NETAPP LOG #95883.00000]Shelf Temp. Alarms...
by Cremers, Ronald 29 Jan '00

29 Jan '00

Hello Eyal, thanks for sharing this, the annoying reported messages should well be fixed, once and for all, in Data OnTap 5.3.4 and up. If you are running that, and still see this error the shelf in question should be replaced. See bugs online for bug 16767: The SCSI-3 Environmental Services (SES) driver on occasion emits an erroneous overtemperature failure containing an impossible temperature. An overtemperature failure would normally be preceded by an overtemperature warning; the warning is not issued. The error is typically quickly reported as having been corrected. A typical report: Eurologic EDM shelf 5 on host adapter 8 reports a critical condition Digital Temperature Sensor Element 1 reports critical status overtemperature failure temperature: 217 (C), 422 (F) Sometime the temperature reported is very low rather than very high. It is very apparent that this fault should be ignored. A temperature reported so far above fault conditions cannot be reached in a ten second interval. WORKAROUND: There is no workaround. Examine the messages file to see if there are any persistent temperature reports. Constant faults would indicate the temperature sensor has reached a hard error state. In that case the shelf must be replaced. FIX: The problem is corrected in 5.3.4 Ronald Cremers, NetApp TSE, Europe. )-----Original Message----- )From: owner-dl-support(a)netapp.com )[mailto:owner-dl-support@netapp.com]On )Behalf Of Eyal Traitel )Sent: 29 January 2000 19:02 )To: toasters(a)mathworks.com )Cc: support(a)netapp.com; vine(a)netapp.com; dubi; Menachem Kaiser )(r53417); )Mati Giladi (r57914); Haim Leib (r52445) )Subject: [NETAPP LOG #95883.00000]Shelf Temp. Alarms... ) ) )Hi ! ) )Does anybody have this errors ALL THE TIME ?!? )It seems that we've had enough of these... ) )CAN SOMEONE SOLVE THIS ONCE AND FOR ALL ????? ) )Eyal/Motorola. ) ) )****************************************** )Eurologic EDM shelf 7 on host adapter 7 reports a )critical condition ) Digital Temperature Sensor ) Element 1 reports critical status ) overtemperature failure ) temperature: 228 (C), 442 (F) ) )Sat Jan 29 18:59:49 IST [statd]: *** NOTICE *** ) Fault reported on disk storage shelf )attached to slot 7. ) Please check fans, power and temperature. ) ) ) )

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RE: max file system size
by mds＠gbnet.net 28 Jan '00

28 Jan '00

On Fri 28 Jan, 2000, tkaczma(a)gryf.net wrote: > On Fri, 28 Jan 2000, Jason Middlebrooks wrote: > > NetApp person. Besides, I though they were 36GB drives. As per > performance, of course, there is bus arbitration overhead to start. Also Bus arbitration may be reduced by reducing the number of active devices on a loop? At least that would be my intuition. Has anyone quantified any effects this might carry through to the head's performance? Analytic, simulated or empiracle evidence would all be acceptable! > you're talking about putting in huge drives, which maximum input/output is > still about the same as the smaller drives. Drive performance hasn't > improved all that much while capacity has increased significantly. That's always been one of my concerns - in fact I think this has cropped up on the list before at least once. Each successive volume increment in SCSI disks seemed to about double capacity while only raising IO's/s by say 20% over each generation. As capacities grow this gradient mismatch between the two characteristics means data gets relatively less accessible per spindle. This is why *more* spindles are often recommended for high-performance/bandwidth requirements. So far so orthodox. It'd be nice to see what bus arbitration, RAID calculation overheads and fs-layout&maintenance take away by counterpoint due to such increased spindle-counts. If anything. My intuition is that spindles are a key factor in these algorithms, whereas larger linear arrays of sectors at each spindle are less significant. Any volunteers to argue either way? Recently I've been pleasantly surprised by the performance of Seagate/Sun 9GB disks - able to transfer 2-3x what old 4.5GB disks could, but then I suppose this is a generation or two further on and 4.5GB disks aren't really being produced. Fibre-channel product almost certainly gets highest-performance controllers, interfaces and firmware so maybe Tom and I do them a disservice by suspecting them of the same capacity-curve mismatch described above. Evidence about all this would be welcome. I'd bet we've almost all of us, at some point, bought at least one filer intended for heavy use (usenet, Oracle, etc.) and had to intuit how our disk-size, spindle-count and loop/chain-count decisions would impact our actual performance. Often this might even override questions of money (perish the thought!). If someone in NetApp engineering or testing hasn't had their own curiosity piqued by this vexed question yet and drawn up matrices describing the tradeoffs, or even shown convincingly that there are no real tradeoffs to be made, then perhaps someone might sound them out about it soon? Ever living in hope.. >-- End of excerpt from tkaczma(a)gryf.net -- -Mark ... an Englishman in London ...

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win2k , WINS and serving CIFS
by Farid Hamjavar 28 Jan '00

28 Jan '00

Hello, This is not entirely related to netapp but it somewhat is. Being a primarily unix environment, we have these two windows-nt boxes that really don't do much but act as WINS server so our clients can access the netapp filers. And that's how we serve CIFS. Not being a windows person, I like to ask what do we need to do with win2k coming to picture. Will a win2k client be able to access files via CIFS the way we do it now? Is that true that WINS service is history and no longer available? If so, how would we keep on giving CIFS service to our windows clients? Thanks, Farid

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RE: Minimum Disks
by Mohler, Jeff 28 Jan '00

28 Jan '00

Four, you have to have drive IDs 3,4,11,12 in-place for FCAL shelf services to function properly. Add IDs 2 and 10 if you have a cluster. -----Original Message----- From: July at Zerowait [mailto:july@zerowait.com] Sent: Friday, January 28, 2000 11:52 AM To: toasters(a)mathworks.com Subject: Minimum Disks On a F740 with two shelves, what is the minimum number of disks a person can use? -- ---------------------------------------------------------------- July A. J. Linett, VP Tech Mktg 302.266.9408 july(a)zerowait.com Zerowait: Best Of Breed Internet Core Technologies Web Acceleration ** Data Storage ** Load Balancing www.zerowait.com*www.loadbalancing.net*www.nas-san.com -------------------------------------------------------------------

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Minimum Disks
by July at Zerowait 28 Jan '00

28 Jan '00

On a F740 with two shelves, what is the minimum number of disks a person can use? -- ---------------------------------------------------------------- July A. J. Linett, VP Tech Mktg 302.266.9408 july(a)zerowait.com Zerowait: Best Of Breed Internet Core Technologies Web Acceleration ** Data Storage ** Load Balancing www.zerowait.com*www.loadbalancing.net*www.nas-san.com -------------------------------------------------------------------

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RE: max file system size
by Reidenbach, Edward 28 Jan '00

28 Jan '00

Jason' response is correct. -----Original Message----- From: Timothy A. McCarthy [mailto:tmac@netapp.com] Sent: Friday, January 28, 2000 7:37 AM To: Jason Middlebrooks Cc: toasters(a)mathworks.com Subject: Re: max file system size The F760 could have at most: 168 9GB disks for total Raw/unformatted capacity of 1.4TB (Minimum 3 loops of 56 disks) or 84 18GB disks for a total Raw/unformatted capacity of 1.4TB (Minimum 2 loops, can have no more than 56 drives on one loop) or 42 36GB disks for a total Raw/unformatted capacity of 1.4TB (Minimum 1 loop. More loops can be added if desired).

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RE: max file system size
by Bond, Andrew 28 Jan '00

28 Jan '00

Actually no you can't - 56 * 36 = 2TB, which is not currently supported. You can have 42 * 36GB drives on an F760 (42 * 34.5GB formatted = 1.4TB). I don't believe there is any performance compromise here; there may possibly be a benefit in splitting the disks over two loops for particular access patterns (for example large sequential access), but I don't believe we have done any profiling of this yet. Regards, Andrew > -----Original Message----- > From: Jason Middlebrooks [mailto:Jason_Middlebrooks@datalink.com] > Sent: 28 January 2000 15:44 > To: Bond, Andrew > Cc: toasters(a)mathworks.com > Subject: RE: max file system size > > > So on a F760 I can have 56 32GB drives on one fibre loop? Is any > performance lost here? > > Thanks > Jason > > > > > > "Bond, Andrew" <abond(a)netapp.com> on 01/28/2000 09:48:33 AM > > To: Jason Middlebrooks/Datalink > cc: toasters(a)mathworks.com > Subject: RE: max file system size > > > > > This question should really be addressed to your local NetApp > sales person > or > SE, however: > > > Is the maximum storage per fibre loop still 464.4GB? > > No. > > The maximum storage per F760 is presently approx. 1.4TB raw > disk space. > This > can be on one loop or more than one loop, in whatever config > you require, > subject to a maximum of 56 devices per loop. > > Regards, > Andrew > > > >

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max file system size
by Jason Middlebrooks 28 Jan '00

28 Jan '00

Is the maximum storage per fibre loop still 464.4GB? So I can not have 8 shelves full of 18 GB drives but I can have the following: 56 9 GB drives 28 18 GB drives 14 36 GB drives If so this sucks. The drives are improving but the total storage space is not increasing. When is this going to change? Jason

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RE: max file system size
by Bond, Andrew 28 Jan '00

28 Jan '00

This question should really be addressed to your local NetApp sales person or SE, however: > Is the maximum storage per fibre loop still 464.4GB? No. The maximum storage per F760 is presently approx. 1.4TB raw disk space. This can be on one loop or more than one loop, in whatever config you require, subject to a maximum of 56 devices per loop. Regards, Andrew

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SQL users
by Michael Linett 28 Jan '00

28 Jan '00

Hi : We have a customer who is seriously considering purchasing a NetApp 740 from us and he wants to know if he can contact some folks who are using a Filer with SQL7.0 and what problems have been encountered. I was hoping that a few of the toasters group might be able to provide us with your references and experiences, as most of our customers are not using SQL7.0. Thanks for your help, Michael Linett - President Mike(a)zerowait.com * http://www.zerowait.com PH 302.266.9408 FX 302.738.4302 http://www.loadbalancing.net - The Source for information on Load Balancing Technology http://www.nas-san.com - Information on Network Attached Storage and Storage Area Networks

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toasters January 2000