SUMMARY: What device is this.

2007-12-24 19:28:00


Thanks to the following people I was able to find the HOT devices to
hopefully resolve my IO blues.

From: Daniel Serna.
You can try iostat -xn which gives you the real device names rather than
the ssd, sd names:

tlaloc:/var/log# iostat -xn
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 1.5 0.1 4.7 0.0 0.0 0.0 18.7 0 1 c0t0d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.0 0 0 c0t1d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c0t6d0
0.0 0.5 0.1 4.2 0.0 0.0 0.0 12.4 0 1 c1t2d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
tlaloc:vold(pid314)

From: Bertrand Hutin

vxprint -h -v vol01
will show what elements compose the vol01 volume.

From: Ken Germann

A 'vxprint -ht' will give you a breakdown of the veritas names and how
they map down to physical devices on your system.

'vxstat <diskgrp>' gives you a good view of the activity of reads and
writes by disk group '

Jose E. Morales Olivares
Responsable De Sistemas
Inicia Comunicaciones SA
Gran Va 32 5 Planta
Madrid, Espaa 28013

http://www.inicia.es
Hello Managers,

I have a serious IO problem, but I cant seem to Identify witch device or
devices the problems are on.
This is mainly do to the way RAID MANAGER and Vol. MANAGER change the
naming
scheme of the devices.
If anyone can help, I will sum.

And here a sample output of a mount -p:
/dev/vx/dsk/ora1dg/vol01 - /disco1 vxfs - no rw,log,suid

This is the mount point of our ORACLE DB and I can't identify which devices
are associated with this mount point.
Im including the following info to in case it helps someone point me in the
right direction.

Here is an output of vxstat and sar respectively:

Mon Feb 26 13:08:55 2001
dm disk01 1 33 16 616 10.0 297.0
dm rootdisk 0 35 0 654 0.0 315.7
vol rootvol 1 24 16 378 10.0 398.8
vol swapvol 0 0 0 0 0.0 0.0
vol var 0 15 0 334 0.0 208.7

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