about disk

[wangxi]

expert,
when i use "vgdisplay",my system return the information
"vgdisplay: Warning: couldn't query physical volume "/dev/dsk/c4t14d0":
The specified path does not correspond to physical volume attached to this volume group"

this disk is an EMC disk,how can i check it

[Tom Geudens]

Hi,

Does an
#ioscan -fn /dev/dsk/c4t14d0
return the disk as CLAIMED ? Otherwise there might be something wrong with the path to the disk.

If CLAIMED you can check the disk with
#diskinfo /dev/rdsk/c4t14d0
If it returns a size of 0 (or doesn't return , the disk is bad.

However, since you say this is a disk in an EMC-box, that would surprise me (normally there's hotspares in a box like that).

Are you sure the disk is NOT in a volumegroup ? You can check this with
#strings /etc/lvmtab
If the disk is in there ... it's in a volumegroup !

Hope this helps,
Tom

[Michael Tully]

Hi,

First try to see if the disk is in fact a valid one or one that EMC may use as a
gatekeeper (used for EMC statistics). It could also be that disk does not exist anymore.

# diskinfo /dev/rdsk/c4t14d0
# ioscan -fn (and look under the column of
s/w state for that disk)

Post the output and we'll see if we can help further.

Michael

[Scott Van Kalken]

Don't add a gatekeeper to a VG as I once did...
just to see what would happen of course... it wasn't good.

[wangxi]

I can see it was CLAIMED in ioscan -fnC disk
and i can also see it belong to a vg with "string /etc/lvmtab"
but when i use "vgdisplay -v VG_NAME"
i can't see it at the end of display content.
if i could backup the data in lv without mount it as a filesystem,how can i do.

[Michael Tully]

What was the output of

# diskinfo /dev/rdsk/c4t14d0

# dd if=/dev/dsk/c4t14d0 of=/dev/null bs=1024

This will hopefully determine as to whether your disk is good or not....

Michael

[Wilfred Chau_1]

pvdisplay /dev/dsk/c4t14d0, what do you get?

also do strings /etc/lvmtab