toasters

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13529 discussions

Symlink support in ftp server
by Mike Sphar 24 Jul '01

24 Jul '01

Does anyone know if it's possible for the ftp server on a netapp to allow symlinks to point outside the root directory? I realize there are security reasons for normally not wanting this, but I've got a few scattered directories on my filer that I'd like to make available via anonymous ftp, and I'd rather not have to rearrange the data on the filer or make copies of the files. I'd hoped to create an anonymous ftp directory and create symlinks in it to point to the directories I want to make available. However so far that hasn't seemed to work. I've poked around a bit on NOW but haven't found any reference to this possibility.

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general filer gripe
by Leonard, Roger 23 Jul '01

23 Jul '01

This is probably covered in NetApp 101 but never having taken the classes (yet) I need something clarified. Environment: Sun solaris with automounter and different flavors of filers running ATM and LANE. i mucked up the networking portion of the rc file and the filer was essentially hung trying to export filesystems. it could not resolve the addresses to these hosts because it could not get dns or nis or any name resolution or even a default route for that matter. It hung while complaining for over an hour. so i could not get in through my normal "cd /net/filername/etc" my final recourse was to create boot floppies, boot from them, selecting "boot without rc" bringing up networking with ifconfigs and elconfigs, then going in through "cd /net/filername/etc" and editing the rc file accordingly and rebooting. very slow and tedious. My basic question is: was this the proper way to fix a screwed up rc? boot floppy manually config network cd /net/filername/etc edit rc Or is there a way to edit the rc file from a terminal session? or any other of the /etc files? what is the quickest way to recover from this type of problem?? can i boot the filer kernel in single user mode without networking? What is the best way to get around this problem in the future? Can i make the exports fail and just come up to a prompt or do i have to boot floppy everytime? if i hardcoded my export hosts in the /etc/hosts would the filer come up even without networking and NIS/DNS, etc? thanks Roger D. Leonard

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RE: general filer gripe
by Mike Sphar 20 Jul '01

20 Jul '01

Except that my configuration files had already been changed during the Ontap upgrade, obviously, as the machine wouldn't operate on the network after rebooting, so I had no idea of knowing what else was messed up in the config files. I had to operate on the assumption that everything was in an unknown state, not just the network interface, so I got the basic configuration reset quickly and then brought the system up and reviewed all the settings afterwards, pulling some back out of snapshots and resetting others manually. Depending on how much of the configuration was lost, I might have also lost the hosts file or name resolution or NIS configuration info, for example, and ifconfig wouldn't have fixed that, and the filer wouldn't have known who the admin host was, which would have simply sent me back to the console to fix more stuff and left the system down longer. In my experience, it's sometimes better to minimize downtime by trying a solution that will quickly cover many potential problems rather than investigate and repair one problem at a time. (Especially when you're instructing someone else what to do over the phone, as I was in this recent case from a couple thousand miles away.) -----Original Message----- From: Shuey, Chuck [mailto:cds@netapp.com] Sent: Friday, July 20, 2001 11:45 AM To: 'Mike Sphar'; 'toasters(a)mathworks.com' Subject: RE: general filer gripe The best solution is to run the ifconfig command manually from the console to bring up an interface. Then, you can mount the root volume on your admin host to edit the /vol/vol0/etc/rc file. This way, you don't have to redo all of your configuration files that the setup script would otherwise change. Chuck Shuey Professional Services Engineer Network Appliance -----Original Message----- From: Mike Sphar [mailto:mikey@Remedy.COM] Sent: Friday, July 20, 2001 7:41 AM To: 'toasters(a)mathworks.com' Subject: RE: general filer gripe I've had similar situations where networking info was messed up after an ontap upgrade, but it only hung for a few minutes before I got a login prompt on the console, at which point I just logged in and re-ran "setup" which prompts for all the networking info. Then after the networking was fixed I restored some of my original settings (like the exports file) from snapshots. -----Original Message----- From: Leonard, Roger [mailto:Roger.Leonard@marconi.com] Sent: Friday, July 20, 2001 7:19 AM To: 'toasters(a)mathworks.com' Subject: general filer gripe This is probably covered in NetApp 101 but never having taken the classes (yet) I need something clarified. Environment: Sun solaris with automounter and different flavors of filers running ATM and LANE. i mucked up the networking portion of the rc file and the filer was essentially hung trying to export filesystems. it could not resolve the addresses to these hosts because it could not get dns or nis or any name resolution or even a default route for that matter. It hung while complaining for over an hour. so i could not get in through my normal "cd /net/filername/etc" my final recourse was to create boot floppies, boot from them, selecting "boot without rc" bringing up networking with ifconfigs and elconfigs, then going in through "cd /net/filername/etc" and editing the rc file accordingly and rebooting. very slow and tedious. My basic question is: was this the proper way to fix a screwed up rc? boot floppy manually config network cd /net/filername/etc edit rc Or is there a way to edit the rc file from a terminal session? or any other of the /etc files? what is the quickest way to recover from this type of problem?? can i boot the filer kernel in single user mode without networking? What is the best way to get around this problem in the future? Can i make the exports fail and just come up to a prompt or do i have to boot floppy everytime? if i hardcoded my export hosts in the /etc/hosts would the filer come up even without networking and NIS/DNS, etc? thanks Roger D. Leonard

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RE: general filer gripe
by Shuey, Chuck 20 Jul '01

20 Jul '01

The best solution is to run the ifconfig command manually from the console to bring up an interface. Then, you can mount the root volume on your admin host to edit the /vol/vol0/etc/rc file. This way, you don't have to redo all of your configuration files that the setup script would otherwise change. Chuck Shuey Professional Services Engineer Network Appliance -----Original Message----- From: Mike Sphar [mailto:mikey@Remedy.COM] Sent: Friday, July 20, 2001 7:41 AM To: 'toasters(a)mathworks.com' Subject: RE: general filer gripe I've had similar situations where networking info was messed up after an ontap upgrade, but it only hung for a few minutes before I got a login prompt on the console, at which point I just logged in and re-ran "setup" which prompts for all the networking info. Then after the networking was fixed I restored some of my original settings (like the exports file) from snapshots. -----Original Message----- From: Leonard, Roger [mailto:Roger.Leonard@marconi.com] Sent: Friday, July 20, 2001 7:19 AM To: 'toasters(a)mathworks.com' Subject: general filer gripe This is probably covered in NetApp 101 but never having taken the classes (yet) I need something clarified. Environment: Sun solaris with automounter and different flavors of filers running ATM and LANE. i mucked up the networking portion of the rc file and the filer was essentially hung trying to export filesystems. it could not resolve the addresses to these hosts because it could not get dns or nis or any name resolution or even a default route for that matter. It hung while complaining for over an hour. so i could not get in through my normal "cd /net/filername/etc" my final recourse was to create boot floppies, boot from them, selecting "boot without rc" bringing up networking with ifconfigs and elconfigs, then going in through "cd /net/filername/etc" and editing the rc file accordingly and rebooting. very slow and tedious. My basic question is: was this the proper way to fix a screwed up rc? boot floppy manually config network cd /net/filername/etc edit rc Or is there a way to edit the rc file from a terminal session? or any other of the /etc files? what is the quickest way to recover from this type of problem?? can i boot the filer kernel in single user mode without networking? What is the best way to get around this problem in the future? Can i make the exports fail and just come up to a prompt or do i have to boot floppy everytime? if i hardcoded my export hosts in the /etc/hosts would the filer come up even without networking and NIS/DNS, etc? thanks Roger D. Leonard

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pegged filer....write bound?
by Todd C. Merrill 20 Jul '01

20 Jul '01

Scenario: clustered F840's, ONTAP 5.3.7R2 one is a busy filer of mostly home directories other is fine, no problems, much less loaded middle of the day, response takes a nosedive on the busy one CPU is pegged at 100% very little NFS, CIFS, or network traffic no backups or restores going on no snapshots in progress (that we can tell) As a user, response is *extremely* slow; sometimes a stat of a known populated directory returns empty. Effectively the filer is not serving data. (Worse, in my opinion, that it returns the *wrong* data.) We turn off NFS to see if that is the culprit. Still CPU is pegged. We terminate CIFS to see if that is. CPU drops down, but not to zero. We have only NFS, CIFS, and cluster licensed (i.e., no HTTP). Here's what we saw: home> sysstat 2 CPU NFS CIFS HTTP Net kB/s Disk kB/s Tape kB/s Cache in out read write read write age 10% 0 0 0 10 6 12074 0 0 0 24 47% 0 0 0 8 5 6369 7 0 0 24 47% 0 0 0 13 7 16479 20258 0 0 24 33% 0 0 0 4 3 11858 13180 0 0 24 34% 0 0 0 8 4 12698 14703 0 0 24 9% 0 0 0 9 5 11392 8 0 0 24 9% 0 0 0 7 4 11097 0 0 0 24 58% 0 0 0 9 3 6453 2415 0 0 24 39% 0 0 0 7 2 15218 17034 0 0 24 39% 0 0 0 5 2 13560 16924 0 0 24 31% 0 0 0 9 5 11633 11593 0 0 24 8% 0 0 0 8 4 10634 8 0 0 24 10% 0 0 0 9 5 12992 0 0 0 23 62% 0 0 0 8 3 9828 8030 0 0 23 44% 0 0 0 9 4 17156 19024 0 0 23 37% 0 0 0 6 3 15229 17994 0 0 23 9% 0 0 0 6 2 12204 8 0 0 23 10% 0 0 0 11 5 13574 8 0 0 23 66% 0 0 0 5 3 9354 11421 0 0 23 Pardon my French, but WTF is this filer doing? It looks and smells like snapshot behaviour, but we weren't even near to the time it should be doing a snapshot via the schedule. No external scripts would initiate one, either. Our solution was, unfortunately, a reboot. The second time this happened, we grabbed some output from `wafl_susp` to check on the consistency points, since we are suspecting this poor filer is write-bound (insufficient NVRAM cache--half is "lost" to the partner for clustering). The counts of all the cp_* parameters show *less* than the minimum number of consistency points expected (uptime times 6 per minute, i.e., a minimum of once every 10 seconds). And, of course, lots of cp_from_log_full and cp_from_cp. Anybody seen anything like this? Any idea what is going on? Are we just beating the crap out of this thing, and it gives up the ghost by pretending it is busy to avoid doing anything else? (We've already got another clustered pair of F840's in house, in testing, soon to be deployed. Not soon enough. Figures.) Until next time... The Mathworks, Inc. 508-647-7000 x7792 3 Apple Hill Drive, Natick, MA 01760-2098 508-647-7001 FAX tmerrill(a)mathworks.com http://www.mathworks.com ---

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Re: general filer gripe
by Jamey Maze 20 Jul '01

20 Jul '01

Roger, Assuming you can get to the filer's console, you could list the rc file using "rdfile /etc/rc" and then re-create it using "wrfile /etc/rc". Be warned, however, wrfile completely wipes out the existing file and you will need to re-enter every line. It's as if you did "cat > /etc/rc". But if you are using a terminal where you can do cut & paste, paste the original text up to the point where you need to make the change, make the change, and then paste the rest of the file. Remember to hit Control-C on a blank line to exit wrfile. wrfile is very basic, but effective in situations like the one you described. At 10:19 AM 7/20/2001 -0400, Leonard, Roger wrote: >This is probably covered in NetApp 101 but never having taken the classes >(yet) I need something clarified. > >Environment: Sun solaris with automounter and different flavors of filers >running ATM and LANE. > >i mucked up the networking portion of the rc file and the filer was >essentially hung trying to export filesystems. it could not resolve the >addresses to these hosts because it could not get dns or nis or any name >resolution or even a default route for that matter. It hung while >complaining for over an hour. so i could not get in through my normal "cd >/net/filername/etc" my final recourse was to create boot floppies, boot >from them, selecting "boot without rc" bringing up networking with >ifconfigs and elconfigs, then going in through "cd /net/filername/etc" and >editing the rc file accordingly and rebooting. very slow and tedious. > >My basic question is: was this the proper way to fix a screwed up rc? > >boot floppy >manually config network >cd /net/filername/etc >edit rc > >Or is there a way to edit the rc file from a terminal session? or any other >of the /etc files? > >what is the quickest way to recover from this type of problem?? > >can i boot the filer kernel in single user mode without networking? > >What is the best way to get around this problem in the future? Can i make >the exports fail and just come up to a prompt or do i have to boot floppy >everytime? > >if i hardcoded my export hosts in the /etc/hosts would the filer come up >even without networking and NIS/DNS, etc? > >thanks > >Roger D. Leonard -- James N. (Jamey) Maze Network Appliance SE (615) 496-4799

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RE: general filer gripe
by Mike Sphar 20 Jul '01

20 Jul '01

I've had similar situations where networking info was messed up after an ontap upgrade, but it only hung for a few minutes before I got a login prompt on the console, at which point I just logged in and re-ran "setup" which prompts for all the networking info. Then after the networking was fixed I restored some of my original settings (like the exports file) from snapshots. -----Original Message----- From: Leonard, Roger [mailto:Roger.Leonard@marconi.com] Sent: Friday, July 20, 2001 7:19 AM To: 'toasters(a)mathworks.com' Subject: general filer gripe This is probably covered in NetApp 101 but never having taken the classes (yet) I need something clarified. Environment: Sun solaris with automounter and different flavors of filers running ATM and LANE. i mucked up the networking portion of the rc file and the filer was essentially hung trying to export filesystems. it could not resolve the addresses to these hosts because it could not get dns or nis or any name resolution or even a default route for that matter. It hung while complaining for over an hour. so i could not get in through my normal "cd /net/filername/etc" my final recourse was to create boot floppies, boot from them, selecting "boot without rc" bringing up networking with ifconfigs and elconfigs, then going in through "cd /net/filername/etc" and editing the rc file accordingly and rebooting. very slow and tedious. My basic question is: was this the proper way to fix a screwed up rc? boot floppy manually config network cd /net/filername/etc edit rc Or is there a way to edit the rc file from a terminal session? or any other of the /etc files? what is the quickest way to recover from this type of problem?? can i boot the filer kernel in single user mode without networking? What is the best way to get around this problem in the future? Can i make the exports fail and just come up to a prompt or do i have to boot floppy everytime? if i hardcoded my export hosts in the /etc/hosts would the filer come up even without networking and NIS/DNS, etc? thanks Roger D. Leonard

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RE: Corruption in data
by Muhlestein, Mark 19 Jul '01

19 Jul '01

This is bug 8075. It's fixed in 6.0 and later releases. Mark -----Original Message----- From: Clawson, Simon [mailto:simon_clawson@mentorg.com] Sent: Thursday, July 19, 2001 3:41 AM To: 'toasters(a)mathworks.com' Subject: Corruption in data Hi, I have a user who is experiencing data corruption. He opens a file in textpad, saves it then uses the file in an application and finds it has null characters in it. I checked through and found he had run out of quota. I increased this and all appears to be well. My question is - can low or no disk quota cause data corruption? Simon Simon Clawson HDS Team Systems Administrator Mentor Graphics Uk Rivergate London Road Newbury Berkshire RG14 2QB <<Clawson, Simon.vcf>>

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Novell on NetApp, is it workable longterm?
by Robin Croley 19 Jul '01

19 Jul '01

Does anyone have any experience integrating Netware 5.1, NDS 7 and Groupwise 5.2 with a Filer? I sell NetApps in Dallas and need war stories, feedback, testimonials, and any other info for a potential client that has roughly 20 Novell servers, 36 NT boxes, and 9 or 10 Unix machines. They have no plans to retire Novell anytime soon, so need a long-term workable solution instead of a planned migration scenario. Thanks, Robin Croley Axis Technologies Ph: 972.588.1875 Fax: 972.588.1873 www.axistec.com <http://www.axistec.com/> robin(a)axistec.com

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72GB BCS disk as hot spare
by Moshe Linzer 19 Jul '01

19 Jul '01

Assume I have an F760 filer running 6.x with disk shelves as follows: 2xFC8 (18GB disks), 4xFC9 (36GB disks), and 1xDS14 (72GB disks). The 18 and 36GB disks (2 volumes) use Zone checksums, while the 72GB disks (1 volume) use Block checksums. My question: can I keep a single 72GB BCS disk as hot spare for the whole filer? If a failure occurs on a smaller disk, the filer will reconstruct on the 72GB spare. Then I can replace the broken disk with one the correct size, and fail the rebuilt 72GB disk over to the new disk. The 72GB disk is then reinserted as hot spare. The only question is: Will it work? NOW says that a BCS disk can be a hot spare for a ZCS volume, but they don't relate to DS14 shelves. And any unforseen gotchas. Thanks, Moshe -- ----------------------------------------------------------------------------- Moshe Linzer | On the Internet, IT Manager | National Semiconductor, Israel | nobody knows you're a moron. Phone: 972-9-970-2247 | Fax: 972-9-970-2001 | - Network Magazine Email: moshel(a)nsc.com | -----------------------------------------------------------------------------

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