topic Re: MSA 1000 in Operating System - HP-UX

MSA 1000

Gabor Verebelyi_3 — Tue, 20 Dec 2005 12:43:39 GMT

Hi!

I have HP-uX 11.23 and MSA1000 with 3 luns, it's working fine, i put single disk in MSA1000 and created raid 0 volume on single disk. ioscan recognize the new volume, pvcreate ok, but i want to create vg, i got the following message.

# vgcreate vgdata04 /dev/dsk/c4t0d4
Increased the number of physical extents per physical volume to 17365.
Volume group "/dev/vgdata04" has been Successfully created.
vgcfgbackup: IO error on Physical Volume device /dev/rdsk/c4t0d4: I/O error

i don't know why.
Do you have any idea?

thanks

Re: MSA 1000

Julio Yamawaki — Wed, 21 Dec 2005 12:13:54 GMT

Hi,

Try a pvcreate -f /dev/rdsk/c4t0d4 before creating volume group.

Re: MSA 1000

Gabor Verebelyi_3 — Wed, 21 Dec 2005 12:59:16 GMT

Hi,

Yes, i did run first pvcreate -f /dev/rdsk/c4t0d0, it was success, but after this vgcreate failed.

thanks

Re: MSA 1000

Julio Yamawaki — Thu, 22 Dec 2005 06:56:02 GMT

Hi,

What kind of erro ocurred?

Re: MSA 1000

Gabor Verebelyi_3 — Thu, 22 Dec 2005 07:05:26 GMT

Hi !

This is the command and output.

# vgcreate vgdata04 /dev/dsk/c4t0d4 Increased the number of physical extents per physical volume to 17365.
Volume group "/dev/vgdata04" has been successfully created.vgcfgbackup: IO error on Physical Volume device /dev/rdsk/c4t0d4: I/O
error

Re: MSA 1000

Julio Yamawaki — Thu, 22 Dec 2005 07:21:55 GMT

Gabor,

What was the steps that you used to install this MSA-1000 in HP box?
Have you installed any patches?

Regards,

Re: MSA 1000

Tvs — Thu, 22 Dec 2005 07:34:15 GMT

hi,

while creating the raid there is an option to select ( iam not sure about the setting . block size, or strip size...etc select this as 4MB - u r deafult os pe size is 4 mb ) the try to create the vg

regards

sunil

Re: MSA 1000

Gabor Verebelyi_3 — Thu, 22 Dec 2005 07:38:21 GMT

Julio,

I didn't install any patch for MSA-1000, but HP-UX box already worked MSA1000 with 3 luns.
Customer wanted one more lun and bought one disk, i put disk in MSA1000 and created raid 0 lun on single disk, then on HP-UX, "ioscan -kfnC disk"
recognized the new disk, then pvcreate run successfully, then vgcreate failed.

is there any needed patch for MSA1000?

thanks

Re: MSA 1000

Steven E. Protter — Thu, 22 Dec 2005 07:46:44 GMT

Shalom,

For stability and the ability to eventually connect another hpux box, make sure the MSA-1000 is at firmware 4.48 or above.

SEP

Re: MSA 1000

Gabor Verebelyi_3 — Thu, 22 Dec 2005 08:49:00 GMT

Hi!

Firmware is ok. HP-UX already used the 3 luns from MSA1000, the problem is new lun. I don't understand, HP-UX can use 3 luns (2 mirror and 1 raid5), but i cannot create volume group on this new volume (raid 0 on single disk).

thanks

Re: MSA 1000

Sameer_Nirmal — Thu, 22 Dec 2005 11:21:35 GMT

Hi,

The "vgcfgbackup: IO error" indicates that the command is failing to write LVM information on the disk on account of I/O error.

I would first take a look at the LUN characteristics on MSA1000 end using ACU
cli > show lun

After presenting the lun with "HP" profile
I would check the the lun using
# diskinfo -v
# pvcreate -f
# pvdisplay -v
Then I would go ahead and create a VG and include the PV in it.

You can try start over again for the new disk to see if it works.