NSS Block errors

[Rick Zeman]

How large of a volume?

>>> "Hans Pfeil" <HPfeil at uca.edu> 2/20/2009 11:41 AM >>>
How much data?  Depending on how much data is out there it could take awhile.  A pool verify is non-intrusive and is much faster than a pool rebuild.  Also, if you do a verify and it finds errors you will not be able to remount your volume.  It forces you to do a rebuild.  A rebuild will take much longer.  It took us about 4 hours to verify and 8 hours for the rebuild.

-Hans


>>> "Rick Zeman" <RZeman at melwood.org> 2/20/2009 9:39 AM >>>
Oh, good point.  NW 6.5 SP7 on a Dell PE 1850 RAID 5 striped across 5 disks.

>>> "James Taylor" <James.Taylor at eastcobbgroup.com> 2/20/2009 10:31 AM >>>
You didn't mention platform or release version, but my experience has been good with nss /poolverify and /poolrebuild.
Some of the earliest versions of nss were a bit shaky in that area, but I've not had a problem recently.  Admittedly, nss runs so well that I have had few instances of needing to use these, and any disk maintenance activity entails some element of risk.

The only times I've had relatively unsuccessful results was when hardware was starting to, or had, failed.  I had one instance where we were able to limp through by doing a couple of rebuilds a day until we got new hardware in to replace some that was failing.

-jt 


James Taylor
The East Cobb Group, Inc.
678-697-9420
james.taylor at eastcobbgroup.com 
http://www.eastcobbgroup.com 






>>> "Rick Zeman" <RZeman at melwood.org> 2/20/2009 10:22 AM >>> 
We're getting this on our main data volume (130GB used out of 180GB):

2-14-2009  12:10:33 am:    COMN-3.25-178  [nmID=A0020]
     NSS-2.70-5009: Pool PG1/VOL1 had an error
     (20012(beastTree.c[510])) at block 6533309(file block -6533309)(ZID 1).

always on the same block.  In all the times I've had NSS volumes, I've never had to run a /pool verify or /pool rebuild and all of the dire warnings have us a bit concerned (OTOH, we've run vrepair with on issues on "classic" volumes in the past with never an issue).  Are we being TOO paranoid?  At what point when a pool has an error does it dismount the volume(s) in the pool?

We're fairly confident in our backups, but short of doing a FULL restore we can't be 100% sure.

Any advice?

TIA,

RCZ


************
This Melwood e-mail may contain information that is proprietary, privileged and/or confidential and is intended exclusively for the person(s) to whom it is addressed, or their designee. Any use, copying, retention or disclosure by any person other than the intended recipient or the intended recipient's designees is strictly prohibited. If you are not the intended recipient or their designee, please notify the sender immediately by return e-mail and delete all copies. Thank you.
************
Sign up for Melwood's e-mail bulletins at http://www.melwood.org/signup.asp 
_______________________________________________
Novell mailing list
Novell at netlab1.oucs.ox.ac.uk 
http://netlab1.usu.edu/mailman/listinfo/novell 


_______________________________________________
Novell mailing list
Novell at netlab1.oucs.ox.ac.uk 
http://netlab1.usu.edu/mailman/listinfo/novell 


************
This Melwood e-mail may contain information that is proprietary, privileged and/or confidential and is intended exclusively for the person(s) to whom it is addressed, or their designee. Any use, copying, retention or disclosure by any person other than the intended recipient or the intended recipient's designees is strictly prohibited. If you are not the intended recipient or their designee, please notify the sender immediately by return e-mail and delete all copies. Thank you.
************
Sign up for Melwood's e-mail bulletins at http://www.melwood.org/signup.asp 
_______________________________________________
Novell mailing list
Novell at netlab1.oucs.ox.ac.uk 
http://netlab1.usu.edu/mailman/listinfo/novell 

_______________________________________________
Novell mailing list
Novell at netlab1.oucs.ox.ac.uk 
http://netlab1.usu.edu/mailman/listinfo/novell


************
This Melwood e-mail may contain information that is proprietary, privileged and/or confidential and is intended exclusively for the person(s) to whom it is addressed, or their designee. Any use, copying, retention or disclosure by any person other than the intended recipient or the intended recipient's designees is strictly prohibited. If you are not the intended recipient or their designee, please notify the sender immediately by return e-mail and delete all copies. Thank you.
************
Sign up for Melwood's e-mail bulletins at http://www.melwood.org/signup.asp