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by Marisa 02 Jun '05

02 Jun '05

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回复
by oysoft＠china-flower.com 02 Jun '05

02 Jun '05

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F840 reboot from watchdog reset
by Tavis Gustafson 01 Jun '05

01 Jun '05

Using ontap 6.4.5 with 1 ds14 over copper fc Last night one of our F840's rebooted itself twice via "watchdog reset". Either before or after the second reboot notification mail was sent the filer froze up with the front LCD panel stuck at some NFS ops/sec number. After a hard reboot it came up fine. I disabled the watchdog timer and the machine stayed up. Has anyone experienced multiple watchdog timer resets or knows what type of hardware failure they watch? Also, how bad is it to keep the watchdog turned off? Thanks, Tavis

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RE: F840 reboot from watchdog reset
by Oscar Rodríguez Hernández 01 Jun '05

01 Jun '05

Hi all, The theory of operation of a watchdog card is a counter that the unit has to reset at regular intervals. In case the counter reaches the maximum value because ONTAP has not reset the counter, the watchdog will reboot the unit. I'm talking off the top of my head, I'm sure someone could point out what the exact behaviour of the watchdog card is. In other words, the unit crashed and become unresponsive and the watchdog rebooted the unit. Disabling the watchdog will not reboot the unit and will leave the head of the filer just crashed, so the filer will stop servicing files until manual intervention is done (power cycle). In my opinion, it would be better to have the watchdog activated and investigate why the unit crashed. If the unit is rebooted because of the watchdog several times, maybe there could be a bug in that particular version of ONTAP (check NOW for possible bugs). To investigate the failure, look at the log messages before the crash in the autosupport, that may help troubleshooting the issue. Regards, Oscar -----Mensaje original----- De: En nombre de Tavis Gustafson Enviado el: 01 June 2005 19:40 Para: orhernandez(a)gmail.com Asunto: F840 reboot from watchdog reset Using ontap 6.4.5 with 1 ds14 over copper fc Last night one of our F840's rebooted itself twice via "watchdog reset". Either before or after the second reboot notification mail was sent the filer froze up with the front LCD panel stuck at some NFS ops/sec number. After a hard reboot it came up fine. I disabled the watchdog timer and the machine stayed up. Has anyone experienced multiple watchdog timer resets or knows what type of hardware failure they watch? Also, how bad is it to keep the watchdog turned off? Thanks, Tavis

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RE: Non disruptive upgrade of FAS960c cluster
by Watanabe, Steve 31 May '05

31 May '05

> From: Steve Losen [mailto:scl@sasha.acc.virginia.edu] > > We want to upgrade a FAS960c cluster from 7.0.0.1 to 7.0.1R1. > The cluster is only doing FC SAN, providing LUNs for our > central email servers, which are Suns running Solaris 8 and > Veritas volume manger and filesystem. Veritas is configured > to to multi-pathing. > > We do not want to schedule downtime for the email servers > whenever we upgrade the filers. I have been reading about > the "non disruptive" upgrade procedure where you install the > new system files, download, and instead of reboot, you "cf > takeover" one filer and "cf giveback", then do the same with > the other filer. > > Is this really significantly less disruptive than doing a > normal upgrade where you "cf disable" and then just reboot > both filers? Hi Steve, The non-disruptive upgrade (NDU) process is the same level of disruptiveness as a reboot (e.g. no disruption for NFS; connection lost for CIFS). The difference is that the length of time the filer isn't servicing the clients is shorter in the NDU case. The takeover time, while dependent on the load of the filers, is faster than a reboot which requires the filer to do POST, load the kernel, scan the Pci bus, init the adapters, init all the processes, etc. > > When you "cf takeover" the current SAN data path that the Sun > boxes are using to access some LUNs becomes unavailable, so > they must switch to an alternate data path through the > surviving filer. How long does this take and how disruptive > is it? Then when you "cf giveback", the Sun boxes need to > switch back to the original data path. If you simply reboot > both filers, then all of the LUNs are unavailable during the > reboot and come back after a minute or two. I've cc'd our FCP person for his answer to this but again the service "pause" is shorter for takeover/giveback then a reboot. > > Is it really less disruptive and "safer" to use the > takeover/giveback procedure in our situation? NDU is a tested, documented procedure. > > I am also concerned about the disk firmware upgrade that may > happen as part of an ONTAP upgrade. Is it better to upgrade > the disk FW before upgrading ONTAP, to make the ONTAP upgrade > as fast as possible? Yes, in fact the current recommendation is that you don't use NDU if you need a disk f/w upgrade and you have raid-4 aggregates. It is ok to use NDU if you use raid-dp or mirrored raid-4 aggregates. -Steve Watanabe NetApp Cluster Group > > > Steve Losen scl(a)virginia.edu phone: 434-924-0640 > > University of Virginia ITC Unix Support > >

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Non disruptive upgrade of FAS960c cluster
by Steve Losen 31 May '05

31 May '05

We want to upgrade a FAS960c cluster from 7.0.0.1 to 7.0.1R1. The cluster is only doing FC SAN, providing LUNs for our central email servers, which are Suns running Solaris 8 and Veritas volume manger and filesystem. Veritas is configured to to multi-pathing. We do not want to schedule downtime for the email servers whenever we upgrade the filers. I have been reading about the "non disruptive" upgrade procedure where you install the new system files, download, and instead of reboot, you "cf takeover" one filer and "cf giveback", then do the same with the other filer. Is this really significantly less disruptive than doing a normal upgrade where you "cf disable" and then just reboot both filers? When you "cf takeover" the current SAN data path that the Sun boxes are using to access some LUNs becomes unavailable, so they must switch to an alternate data path through the surviving filer. How long does this take and how disruptive is it? Then when you "cf giveback", the Sun boxes need to switch back to the original data path. If you simply reboot both filers, then all of the LUNs are unavailable during the reboot and come back after a minute or two. Is it really less disruptive and "safer" to use the takeover/giveback procedure in our situation? I am also concerned about the disk firmware upgrade that may happen as part of an ONTAP upgrade. Is it better to upgrade the disk FW before upgrading ONTAP, to make the ONTAP upgrade as fast as possible? Steve Losen scl(a)virginia.edu phone: 434-924-0640 University of Virginia ITC Unix Support

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Snap restore hung...
by Mats.Oberg＠tietoenator.com 31 May '05

31 May '05

Hi, I was going to test snap restore the other day on one of our filers, it didn't work out the way I was hoping... Anyway, the problem was that the volume is snapmirrored to another filer and the "snap restore" told me that you can't restore on volumes that are snapmirrored. I didn't think that was a big problem until today I discovered that the snapmirroring stoped at around the time I tried the restore.. So now I have a volume that can't do snapshots anymore.. I couldn't even take the volume offline because the snap restore is still running (But restoring a single file shouldn't really take a week to complete, right?) Anybody know how to kill the snap restore?(or remove the lock/flag) I'd rather not reboot unless theres no other option. (the filer is a fas920 running 7.0.0.1p6 if thats any help...) / Mats

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ISCSI boot problems.
by Jeff Mohler 28 May '05

28 May '05

Ive got the Qlogic 4010c card, and so far NO problems at all, except I cannot transfer an existing HDD partition to it, and boot from it. Ive created the LUN, windows mode, and using Ghost I can see it, and do a disk to disk transfer of the old C: drive to the LUN. Then it wont boot, I get the PC error that it cant find anything to boot from. The Qlogic card during boot sees the Lun, and there is even a few moments of activity to the LUN before the PC says it cant. Ive even re-ghosted with the 'copy boot sectors' option no to avail. I can start an XP install from the CD, using the driver floppy, and it will install files, and boot just fine, fast too I might say. If I let XP restart for the disk based install from the LUN, it runs fine, so I reboot again into ghost off a floppy, and go to Xfer the HDD image to the LUN. Same error as the first try..cant boot. Any idears?? I need to work up a plan to migrate from HDD to LUN, and it cant be a dynamic LUN either..so I cant do a simple mirror operation.

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Qlogic 4010c Feedback
by Jeff Mohler 27 May '05

27 May '05

Other than I had up update the BIOS and Firmware to the latest levels (and that the BIOS in the card when I got it reported corrupted), I found the instasllation and configuration of booting via iscsi on the netapp to be pretty painless. Thumbs up from my end.

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RE: amd / netapp issue?
by Leeds, Daniel 26 May '05

26 May '05

hrm, i am also seeing odd cpu issues with 7.0.0.1 on some new deployments. with only a few systems we are constantly over 75% cpu and alot of times well into the 90's steadily on cpu usage. i havnt seen anything related on NOW yet. -----Original Message----- From: owner-toasters(a)mathworks.com on behalf of Langborg Tom Sent: Thu 5/26/2005 6:10 AM To: 'Jay(a)Williamsons.org'; toasters(a)mathworks.com; am-utils(a)am-utils.org Subject: SV: amd / netapp issue? There were some problem with redhat7.3 and nfs. That bug on redhat break down my tru64 fileserver. For that bug you need to update the kernel. We run now 2.4.20-28 on the old rehat7.3. I have also a problem with ontapp 7.0 with 100% cpu. We think it was nfs logical problem who crashed my netapp. So we upgraded now to 7.0.1R1 and hope it works. /tom -----Ursprungligt meddelande----- Från: Jay Williamson [mailto:jay_williamson@yahoo.com] Skickat: den 26 maj 2005 14:20 Till: toasters(a)mathworks.com; am-utils(a)am-utils.org Ämne: amd / netapp issue? Hi. I'm sending this to am-utils and toasters since I'm not entirely sure where the problem is. These systems (redhat73-1, redhat73-2, etc.) are in a cluster. These errors all occur around the same time on all the clients (freqently different jobs) but sometimes spread out across 10-30 minutes. My first guess is simply that the netapps are to busy to answer the clients. *If* that's the case, then what can I change on the netapp or the client-end to mitigate this problem? What other options are there? From the /var/log/amd on clients: redhat73-1: May 25 13:48:01 redhat73-1 amd[965]/error: get_nfs_version: failed to contact portmapper on host "netapp1": RPC: Timed out redhat73-2: May 25 13:48:07 redhat73-2 amd[965]/error: get_nfs_version: failed to contact portmapper on host "netapp2": RPC: Timed out clients are dual Xeons running redhat 7.3 am-utils-6.0.7-4 2.4.20-28.7smp mount options=(rw,hard,intr,grpid,retrans=30,timeo=30,retry=10,dev=00000010,vers=3,proto=tcp) # Interesting note: We actually set retry=10000 but the rh7.3 systems use 10 instead netapps are 960/980 class systems ontap=6.5.2R1P13 They are typically very busy (100%) when the errors occur Network switches show no errors NIC cards on client and netapps show nothing Nothing in the messages file in clients nor on the netapps. Thanks in advance and I'll summarize if I get some good input. - Jay __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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