11.23 LVM Problem = vxfs mount: unrecognized vxfs version number

[Dan Matlock_1]

Having strange problem. I have imported a VG from a loaner server running 11.23 on ia64 system to a NEW server running same OS and ia64. ERROR I get is: vxfs mount: unrecognized vxfs version number when I try to mount LV. I vgimported OK, but can not mount. I have read that problem could occur going to OLDER JFS, but I am moving to newer server.... Could there be a patch fix for this?

[James R. Ferguson]

Hi Dan:

You might need to upgrade the version of the *filesystem* to support this. That is, from a version-4 to a version-5. If so, you would use 'vxupgrade(1m)':

http://www.docs.hp.com/en/B2355-60105/vxupgrade.1M.html

See also, the table headed "JFS (VxFS) Supported Sizes" in this document (including its footnotes):

http://www.docs.hp.com/en/5971-2383/5971-2383.pdf

Regards!

...JRF...

[Dan Matlock_1]

Thanks for input.. Do you know why there would be a difference between two 11.23 systems? That is what through me.

[James R. Ferguson]

Hi (again) Dan:

The 11.23 September 2004 realease is required to utilize JFS filesystems that are larger than 16TB as documented in the footnotes of my first post's references. That would be one possiblity for your observation.

It would be helpful if you specify the JFS version that you are using, along with the filesystem layout version:

# fstyp -v /dev/vgNN/lvolXX

Regards!

...JRF...

[Steven E. Protter]

Shalom,

Basically its an issue of what was done to that loaner system that you would not normally do to one of your 11.23 systems. That loaner box was patched differently and as JRF points out the vxupgrade command was run on it.

SEP

[Dan Matlock_1]

Both servers were built by HP, and the loaner is older which is the one I created the SAN LUNs on. Used them for about 2 months. Now that we bought our server, I thought I'd just export/import the VG/LVM data to the NEW server. It does seem that our 'new' server either has older JFS or some patch issue. I will say other than swlist for JFS type commands, I am not sure how to check the JFS version.

Loaner box is on Dec. 2005 patch bundles, and our new server is on March 2006. Assumed that new server is really newer both patches and JFS, but not sure.

vxfs mount: unrecognized vxfs version number

[Dan Matlock_1]

More info:

Loaner: OnlineJFS01 4.1.004 Online features of the VxFS File System
NEW: OnlineJFS B.11.23.0512 Online features of the VxFS File System

[Dan Matlock_1]

More info and believe the onlinejfs version controls this:

LOANER
hxappd91(root)/# /sbin/vxupgrade /opt/IBM/db2/V8.1
/opt/IBM/db2/V8.1: vxfs file system version 6 layout

NEW SERVER
nxvmid01(root)/# /sbin/vxupgrade /opt/IBM/db2/V8.1
/opt/IBM/db2/V8.1: vxfs file system version 5 layout

[Dan Matlock_1]

question for group, how do I convert back down to version 5? vxupgrade looks to 'upgrade' from like version 5 to 6, but how do I go back??? or can I?

Is it better to upgrade the 'new' server to version 6?

[James R. Ferguson · Accepted solution]

Hi Dan:

OK, so your filesystem layout version is six (6). Well, you can't downgrade to version-5 you can only upgrade.

I think that you will have to install JFS version 4.1:

http://docs.hp.com/en/5991-2762/5991-2762.pdf

When you do, make sure to add patches PHCO_33308 and PHCO_33238 (or superseding) as noted on page-16 of the above link.

Regards!

...JRF...

[Dan Matlock_1]

excellent feedback, thank you all very much. Re-creating LVM is not a option, so I must push HP for the onlineJFS 4.1 so I can read the FS.....