topic Re: Unable extend VG in Operating System - HP-UX

Unable extend VG

Abhijeet_3 — Sun, 07 Mar 2004 11:24:13 GMT

I am able to create a PV on a disk.

But when I tried extend VG using this PV . I received a error message vgextend: Couldn't open physical volume "/dev/dsk/c0t10d0":
I/O error.

Is it Hard disk issue ? or some other reason ?

Looking for your reply.

Re: Unable extend VG

Steven E. Protter — Sun, 07 Mar 2004 11:37:50 GMT

More than likely you have bad disk.

You can test this with cstm, try the command to excersize the disk and if you don't get a good reply its dead.

You can run dmesg or check /var/adm/syslog/syslog.log

SEP

Re: Unable extend VG

Abhijeet_3 — Sun, 07 Mar 2004 12:32:14 GMT

Thanks SEP for your prompt reply.

I am able to see details about this disk using "ioscan -funC disk " It is ok.

When I checked diskinfo -v /dev/rdsk/c0t10d0 , it shows size = 0 Kbytes. Will it be useful to run "mediainit"

Re: Unable extend VG

Steven E. Protter — Sun, 07 Mar 2004 12:41:23 GMT

It there is nothing on the disk, mediainit can't hurt.

I use mediainit to help get data structures off a disk that has structures on it that are interfering with reassigning or re-using the disk.

If the disk is bad, mediainit should fail.

If the disk is bad, nothing is going to make it good.

You could try vgexport and vgimport of the whole volume group. If the problem is not disk related export/import or mediainit might help.

Some admins even at HP don't like mediainit. I use it sparingly.

SEP

Re: Unable extend VG

Patrick Wallek — Sun, 07 Mar 2004 12:51:00 GMT

If the disk is showing 0 bytes for the size then it is almost definitely bad. Place a hardware call with HP and get it replaced.

Re: Unable extend VG

Michael Tully — Sun, 07 Mar 2004 16:41:42 GMT

Your disk is disk, get it replaced. Usually when a diskinfo reports 0 bytes, the disk is stuffed. If it was a connection problem, you would get reported from ioscan a NO_HW message.

Re: Unable extend VG

Sridhar Bhaskarla — Sun, 07 Mar 2004 21:55:37 GMT

Hi,

If this disk is a SAN disk then make sure it is not a place holder (Ghost device) LUN. Check with your Storage Admins. If so, you cannot use it.

If not, then the disk may be bad.

-Sri

Re: Unable extend VG

Sanjiv Sharma_1 — Sun, 07 Mar 2004 22:22:12 GMT

Hi Abhijeet,

If you have added a new disk, then it seems to be defective as it shows 0 KB with diskinfo. Replace it.

If it is a disk in a SAN, then as rightly said it is a dummy disk with 0 KB space and cannot be used.

Thanks,

Re: Unable extend VG

Abhijeet_3 — Sun, 07 Mar 2004 23:04:57 GMT

Thanks everyone.

My issue get resolved.

I have performed "mediainit" on suspect disk. It has taken very long time to complete. No error message during this process.

Now diskinfo shows correct size of this disk. Able to extends VG with this disk.