Funny character in /etc/lvmtab

[Jason Ng Teng Po]

Hi gurus,

OS: HP-UX 10.20 (K Class)

I couldn't mount and couldn't pvdisplay one of my hard disk(K Class storage enclosure) and it gave the following error below when I pvdisplay one of the device path.

#pvdisplay /dev/dsk/c1t9d0
pvdisplay: Warning: Couldn't query physical volume "/dev/dsk/c1t9d0": The specified path does not correspond to physical volume attached to this volume group

pvdisplay: Warning: Couldn't query physical volume "/dev/dsk/c1t10d0": The specified path does not correspond to physical volume attached to this volume group

pvdisplay: Warning: Couldn't query all teh physical volumes.
pvdisplay: Couldn't retrieve the names of the physical volumes belonging to volume group "/dev/vg09".
pvdisplay: Couldn't display physical volume "/dev/dsk/c1t9d0"


When I do a...
#strings /etc/lvmtab
... I get the following output for vg09

vg09
m6e?
/dev/dsk/c1t9d0
/dev/dsk/c1t10d0

What is m6e? ?

And how do I rebuild the VG without interfering with the lvols and the data?

Thanks in advance.

[Johnson Punniyalingam]

vgchange -a y /dev/vg09

vgdisplay -v /dev/vg09

[Johnson Punniyalingam · Accepted solution]

if the /etc/lvmtab is lost or corrupted, It can be reconstructed by scanning the PVGRA/VGRA headers on all your disks,

cp -pi /etc/lvmtab /etc/lvmtab.old

mv /etc/lvmtab /etc/lvmtab.

/usr/sbin/vgscan -v

Thanks,
Johnson

[Jason Ng Teng Po]

after the vgscan, do I need to re-create back my lvols? because I have existing data inside there and I wish to retrieve it back.

[Johnson Punniyalingam]

No need,

vgscan will reconstructed lvmtab only,

Thanks,
Johnson

[Torsten.]

Please see

man strings

what strings does.

"strings looks for ASCII strings in a file. If no file is specified, standard input is used. A string is any sequence of four or more printing characters ending with a newline or null character."

/etc/lvmtab is a **binary** file, strings only extracts characters if they "look like" a string.


So don't care about

"m6e"!!!

Check your ioscan if you have a problem with your external (?) disks.

[Jason Ng Teng Po]

I did an "#ioscan -fnC disk" and all disk are claimed.

[Torsten.]

Is vg09 activated alreaedy?

Try for example

# vgchange -a y vg09

followed by

# vgdisplay -v vg09

Any errors during this?

[Jason Ng Teng Po]

I'm not at my customer place right now but I remember clearly that I can't do a vgchange -a y vg09. There are errors but can't remember.