topic Re: Check for a read-only disk in Operating System - HP-UX

Check for a read-only disk

Sudhindra Prasad — Sun, 13 Aug 2006 12:37:31 GMT

Hello folks,

Is there any way in HP-UX to check if a disk is read-only or read/write without modifying/affecting any data on the disk?

Is there any VXVM or LVM command to do so?

Thanks in advance.

Re: Check for a read-only disk

IT_2007 — Sun, 13 Aug 2006 12:44:03 GMT

yes. If it is only part of volume group say vg10 then do vgdisplay -v vg10 and see if it is avtivated in read only mode.

vgdisplay -v vg10 |more
--- Volume groups ---
VG Name /dev/vg10
VG Write Access read/write
VG Status available
Max LV 255

Re: Check for a read-only disk

Sudhindra Prasad — Sun, 13 Aug 2006 12:48:37 GMT

Hi Srini,

Thanks. But this disk is not configured as part of a LVM VG or a VxVM DG.

Re: Check for a read-only disk

IT_2007 — Sun, 13 Aug 2006 12:51:09 GMT

so give me some more info. Is it raw device accessed by some application like Oracle?

Re: Check for a read-only disk

Sudhindra Prasad — Sun, 13 Aug 2006 12:55:18 GMT

Yes. This disk's properties can be viewed and controlled using the storage s/w. But is there any other way to know whether this disk is writable? This is an EMC array.

Re: Check for a read-only disk

IT_2007 — Sun, 13 Aug 2006 13:00:36 GMT

It make sense now. If disk is assigned to HP-UX then using "sympd list" command you can see that disk is read/write or read only.

Re: Check for a read-only disk

Sudhindra Prasad — Sun, 13 Aug 2006 13:03:47 GMT

But this is again using EMC s/w to find out. Is there any other way to know this? Thanks.

Re: Check for a read-only disk

IT_2007 — Sun, 13 Aug 2006 13:09:36 GMT

Nope. Without assigning to Volume group you won't be accesible it. sympd is a only command tells you that it is read only or read/write since disk is comming from EMC and once it is assigned, created for volume group then OS can control it.

Re: Check for a read-only disk

Sudhindra Prasad — Sun, 13 Aug 2006 13:12:50 GMT

Ok, thanks so much for this information!

Re: Check for a read-only disk

IT_2007 — Sun, 13 Aug 2006 13:45:06 GMT

If you feel your problem solved, please assign some points.

Re: Check for a read-only disk

sathish kannan — Mon, 14 Aug 2006 01:41:56 GMT

Hello Sudhindra,

If you solution enabler installed you can view the device properties using "symdev" and "symdev show LUNNUMBER -sid SYMMETRIXSERIALNUMBER"

Regards
Sathish

Re: Check for a read-only disk

Sudhindra Prasad — Mon, 14 Aug 2006 11:59:05 GMT

hey thanks! so pretty much i will need to use the EMC host s/w commands to get this status.