vgcreate: Volume group "/dev/vg01" could not be created: Unable to read the physical volume.

[gobi_1]

hi error below occurs during vgcreate, any recommendation??? thanks

# vgcreate -s 256 /dev/vg01 /dev/dsk/c6t0d0
Increased the number of physical extents per physical volume to 1599.
vgcreate: Volume group "/dev/vg01" could not be created:
Unable to read the physical volume.
# diskinfo /dev/rdsk/c6t0d0
SCSI describe of /dev/rdsk/c6t0d0:
vendor: DGC
product id: CX4-480WDVR
type: direct access
size: 419430400 Kbytes
bytes per sector: 512

[Aneesh Mohan]

Do first
#pvcreate /dev/rdsk/c6t0d0

Aneesh

[SoorajCleris · Accepted solution]

Hi,

Strings /etc/lvmtab

check if the disk is mentioned.

#mount

check if the disk is mounted as whole disk

# vxdisk list

check if /dev/dsk/c6t0d0 is a vxvm disk

#swapinfo -tam

check if this disk used as swpap


If all tests are fine , do

pvcreate /dev/rdsk/c6t0d0

check if any error message

pvcreate -f /dev/rdsk/c6t0d0

then do vgcreate.

If still you have read error, try to use #dd command adn do testing

Regards,
Sooraj

[TwoProc]

Like the others, I think you forgot to do the "pvcreate" command. This readies a disk to be used to lvm. If you're not going to use lvm on a disk, then you don't need to run pvcreate. In your case, you do.

[Ismail Azad]

run pvcreate with the -f option in case there are some other structures for other disk partitioning approaches already present.

pvcreate -f /dev/rdisk/c6t0d0
mkdir /dev/vg01
mknod /dev/vg01/group c 64 0x010000
vgcreate -s 256 /dev/vg01 /dev/dsk/c6t0d0.

Regards

[gobi_1]

thanks all you guys, all work fine now.