Finding total number of disks

[Vijaya Kumar_3]

Hi,

I am trying to find out total number of disks available on some HP 9000 L5000 class, N4000 and K570 class servers.. I used following command..

disks=`ioscan -fkC disk |grep -v CD|grep -v Class|grep -v ==== |wc -l`
echo "total disks = "$disks

I found some wrong information on the output.
It shows 239 disks on a N class server. Can you please tell me how to find out total number of disks....

thanks in advance
Vijay

[Umapathy S]

ioscan -fkC disk|grep disk|wc -l is not enough?

[Uday_S_Ankolekar]

Did you try ??
ioscan -fnkC disk | grep disk | wc -l

-USA..

[Pete Randall]

Vijay,

I suspect you're seeing alternate paths. You could use SAM but you're probably trying to do this in a script? How about using vgdisplay -v instead of ioscan?


Pete

[Vijaya Kumar_3]

yes, ioscan is not enough it seems.
ioscan -fnkC disk is also not enough.

Pete:
I tried
vgdisplay -v | grep "PV Name"
46

but, i think vgdisplay -v will show only physical volumes that are attached to a VG, is it right? let me check the man pages? any other ideas?

[Hari Kumar]

If you ar using an array and U want find the Disks and not LUNs u can use
armdsp -a |grep 'Disk at ' |wc -l

and the
ioscan -fnC |grep disk |wc -l for the LUN's
i could find correct with alternate links also

[Jeff Schussele]

Hi Vijay,

As Pete has pointed out you have to be careful about using ioscan to determine disk/LUN count. Not only will it show alternate links (effectively doubling the disk count), it will also show "gatekeeper" devices on XPs & EMCs - not to mention CD/DVD devices.

So I'd have to agree that

vgdisplay -v | grep "PV Name" | grep -v grep | grep -v "Alternate Link" | wc -l

would be a better method.

HTH,
Jeff

[Helen French]

1) Your best option would be to use SAM and disk devices to list the disks.
2) You can use the print_manifest command and look at the disk devices session.

[Sundar_7]

Did u try ?

# sympd list

[Steven E. Protter]

Its possible ghost disks are being picked up by the i/o scan. What I mean by that are logical volumes once allocated, but later removed.


I'm attaching a script that will let you check and count(you need to make a mod to get a count) of all disks configured and part of logical volumes.

SEP