VG extend problem--Resource temporarily unavailable

[Jai Gopal]

Hi Admin
While i am trying to extend alternate link of the VG.I am getting the following errors.

vgextend: Couldn't open physical volume "/dev/dsk/c8t14d3":
Resource temporarily unavailable

But if i see the through diskinfo cmd,it show me the proper status and size of the disk as n my primary link to the disk.

Can you suggest something on same.

Thanks in Advance

Jai

[Paul Eadington_1]

Does an Ioscan show the disk as available?
Are you able to dd from the device?

[Henk Geurts]

hi gupta
Looks like a missing connection ;so does
ioscan -fnCdisk
show the disk ?

are the lvols mirrored and still synced?
what does
vgdisplay -v
show?

[Jai Gopal]

I am able to see the disk through ioscan cmd

I am extending the alternate link to the same physical hard disk as we have two FC cards accessing the same disks through two san switches.

Jai

[Paul Eadington_1]

If you run

dd if=/dev/dsk/c8t14d3 of=/dev/null bs=1024

do you get some records in and out?

[Paul Eadington_1]

Check your FC as well.

ioscan -funC fc

you should get something like
fc 0 0/5/0/0 td CLAIMED INTERFACE HP Tachyon XL2 Fibre Channel Mass Storage Adapter
/dev/td0
fc 1 1/12/0/0 td CLAIMED INTERFACE HP Tachyon XL2 Fibre Channel Mass Storage Adapter
/dev/td1

you can then try an fcmsutil /dev/td?

does this all look OK?

[Suraj Singh_1]

Looks the secondary link is not available to this physical disk. Check the Fiber connections.

Also try dd if=/dev/dsk/c8t14d3 of=/dev/null bs=1024 and see for records in and out.

Regards,
Suraj

[erics_1]

Jai,

Can you do a pvdisplay on the primary link?

What does the following return:
vgchange -a n

I wonder if you did a pvcreate on the alt. link (which shouldn't be done)?

Try this:
vgreduce /dev/dsk/
pvcreate -f /dev/dsk/
vgextend /dev/dsk/
vgextend /dev/dsk/

Regards,
Eric

[Jai Gopal]

Hi admin,

DD cmd does not give me any error.Moreover i am providing extra link i.e alternate link to hard disk via second san switch.Pvdisplay and diskinfo show properties.

Fcmutil say the second fiber channel card is online.

Jai

[Jeff Schussele]

Hi Jai,

I'm wondering if this might be a zoning or LUN security issue? Have your storage team verify them & also double-check the world wide name of the HBA & compare it to what the switch thinks it is. Also make sure the switch is in switched fabric mode and not in arbitrated loop mode.

HTH,
Jeff

[Cem Tugrul]

Hi Jai,

Assuming that you have Tachyon HBA then
run "tddiag"
it is similar like print_manifest and gives
very useful information on your system..
And also you can get these information to a
file...and please attach this file here..

good Luck,