LV & PV issue !!!!

[Yogesh M Puranik]

Hello Gurus,

Actully i got below errors while excuting lvdisplay,

# lvdisplay /dev/app_msa/u11
lvdisplay: Warning: couldn't query physical volume "/dev/dsk/c24t0d1":
The specified path does not correspond to physical volume attached to
this volume group
lvdisplay: Warning: couldn't query physical volume "/dev/dsk/c25t0d1":
The specified path does not correspond to physical volume attached to
this volume group
........ so on.....

So i did,

#cp -p /etc/lvmtab /etc/lvmtab.old

#vgscan -v

It solved the problem temporarily.

but it is showing current PVs move than active PVs now.

Cur PV 16
Act PV 11


so i am in bit of confusion wht went wrong and wht to do to resolve this..pls help me.

Rgds
Yogesh

[Torsten.]

/dev/dsk/c24t0d1 is a LUN, so I assume it comes from an array.

If 4 "disks" (LUNs?) are missing, I would expect a problem with your external array.

Post

# ioscan -fnk

What array do you have? Check connectivity and health!

[Michal Kapalka (mikap)]

hi,

check if you have some NO_HW in ioscan -fn |grep NO_HW

Ask SAN admins if they made some changes.

mikap

[SoorajCleris]

Hi,

I think your LUNs are not available. Kindly post

#ioscan -fnC disk

Regards,
Sooraj

[SoorajCleris]

Hi Torsten,

May I ask why you have suggested "fnk" instead of "fn" ?

"k" will not scan the hardware again correct?
So it may give a wrong output with devices with claimed status wich actually NO_HW.

This is my doubt, please advice.

Regards,
Sooraj

[Yogesh M Puranik]

Hi all,

Thnx a lot for ur reply.

The scinario is I went thorough , the lun deallocation activity on the server ( LUN was allocated already from EVA),i had done vgreduce on primary disks, but not on alternate,bcoz of tht i got above error and i did above steps.

I knew that the devices files are not available for these pv's.

Though after settling the issue, why there is a difference between current and active PV's ??

Rgds
Yogesh

[SoorajCleris]

Hi ,

Please post the ioscan output, that will tell you everything.

you may please check vgdisplay -v output also.

cheers
Sooraj

[Torsten.]

@Sooraj Cleris: At this point it was not clear what kind of array it is. For example on a SCSI based array one bad disk can hang the complete bus, so an ioscan may hang too. Just for safety I prefer to do a "-k" first to prevent this. Normally the diags will update the status, so an "ioscan -k" information is not older than ~30 min.

[Yogesh M Puranik]

Attaching ioscan output.

[Torsten.]

Looks like you access the SAN via 1 switch only. Where is the connection to the other SAN?