topic Re: Strange VxFS layout version in Operating System - HP-UX

Strange VxFS layout version

Swalens Eric — Tue, 08 Oct 2002 06:02:56 GMT

Running fstyp -v on a VxFS device (under HP-UX 11i) prints two times the error "cannot open /dev/vg00/lvol5: invalid argument" and the "version" number reported is 2^32-1. Other volumes on the system are fine and report a version 4 layout number.

Does someone know what could give such an error?

Thanks.

Re: Strange VxFS layout version

Dietmar Konermann — Tue, 08 Oct 2002 06:04:20 GMT

You should check at first if the lvol can be generally opend/read by other tools... try reading from it using dd(1) e.g. Maybe you hit a completely different, LVM-related problem...

Regards...
Dietmar.

Re: Strange VxFS layout version

Swalens Eric — Tue, 08 Oct 2002 06:13:22 GMT

The volume is mounted on /home and seems to work fine.

Re: Strange VxFS layout version

Dietmar Konermann — Tue, 08 Oct 2002 06:28:17 GMT

That does not answer the question... :)

You could e.g. mount an lvol and then garble the device special file. The next open() would fail, BUT the lvol would be still mounted and accessible.

So, does the dd work?

Sorry for insisting on this...
Dietmar.

Re: Strange VxFS layout version

Swalens Eric — Tue, 08 Oct 2002 06:48:08 GMT

I see what you mean. I dump 1Mb from the beginning of the volume without any error...

Thanks you for insisting. ;)

Re: Strange VxFS layout version

Dietmar Konermann — Tue, 08 Oct 2002 20:48:30 GMT

Hi!

Sorry, I missed some important info in your initial post... you actuall _get_ some results from fstyp, but only bogus ones.

This really looks like the problem reported as JAGad24643 which is fixed with 11.22. It usually happens after extending or upgrading the FS.

At this point in time no official 11.11 patch is avialable. You should contact your local RC if needed.

Regards...
Dietmar.

Re: Strange VxFS layout version

Swalens Eric — Wed, 09 Oct 2002 06:06:43 GMT

Thank you very much for your help.

Where can I find more information about JAGad24643? Is there a description of the bug and its consequences available online?

Eric

Re: Strange VxFS layout version

Dietmar Konermann — Wed, 09 Oct 2002 07:19:45 GMT

Hi!

Sorry, there is currently only internal documentation about this. Root cause is a missing buffer initialization before usage.

Hint: the latest fstyp patch for 11.00 should include the fix. So you could take PHCO_27567 and fetch the /sbin/fstyp binary from there. Works fine on 11.11 also... of course this would only be an unsupported workaround until an 11.11 patch is released.

Regards...
Dietmar.

Re: Strange VxFS layout version

Swalens Eric — Wed, 09 Oct 2002 09:24:47 GMT

OK.
Thanks for your help.

Eric