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iostat on SAN disk

Sundaram Ramasamy
Occasional Contributor

iostat on SAN disk


we are using HP-UX 11.23ia64 OS for oracle dataase. database stored in EMC SAN storage.

we are using volume manager and powerpath software.

iostat is not returing SAN disk information, I was able see the disk using ioscan command.
tried sar, vmstat, iostat unable to get SAN disk stats.

Is there a way I can get SAN disk io perfomance informaton.

Leif Halvarsson_2
Honored Contributor

Re: iostat on SAN disk

Is the SAN volumes listed with ioscan -fnC disk ?

iostat reports activity on physical volumes. It sounds strange to me that no activity is reported.

I have no experience with EMC disk system and powerpath software but, with EVA disk system and SecurePath, iostat behaviour is normal.
Sundaram Ramasamy
Occasional Contributor

Re: iostat on SAN disk

yes, ioscan seeing the device

$ioscan -funC disk | grep c8
/dev/dsk/c8t0d0 /dev/rdsk/c8t0d0
/dev/dsk/c8t0d1 /dev/rdsk/c8t0d1
/dev/dsk/c8t0d2 /dev/rdsk/c8t0d2
/dev/dsk/c8t0d3 /dev/rdsk/c8t0d3

$iostat |grep c8