topic Re: disk issue in Operating System - HP-UX

disk issue

Rkumar — Mon, 29 Mar 2010 07:03:15 GMT

Dear experts,

I m facing Disk issue. there is a volume group vgbroot. in that volume group we are having two disks(c0t4d0, c0t5d0). This vg is not activated.I have collected this data for ur purose please let me know that whether this info indicate disk (c0t5d0)is not attached to the system.

==================================

a1124158:root ls -lrt c0*
brw-r----- 1 bin sys 28 0x004000 Oct 7 1999 c0t4d0
brw-r----- 1 bin sys 28 0x003000 Oct 7 1999 c0t3d0
brw-r----- 1 bin sys 28 0x005000 Oct 7 1999 c0t5d0
brw-r----- 1 bin sys 28 0x006000 Oct 7 1999 c0t6d0
========================================

a1124158:root diskinfo /dev/dsk/c0t5d0
diskinfo: can't open /dev/dsk/c0t5d0: No such device or address
=========================================
a1124158:root lssf /dev/dsk/c0t4d0
disc3 card instance 0 SCSI target 4 SCSI LUN 0 section 0 at address 8.4.0 /dev/dsk/c0t4d0
=========================================

diskinfo /dev/rdsk/c0t5d0
diskinfo: can't open /dev/rdsk/c0t5d0: No such device or address

a1124158:root diskinfo /dev/rdsk/c0t4d0
SCSI describe of /dev/rdsk/c0t4d0:
vendor: HP
product id: C2247M1
type: direct access
size: 1027432 Kbytes
bytes per sector: 512
==============================================
a1124158:root ioscan -fnC disk|more
Class I H/W Path Driver S/W State H/W Type Description
==============================================================
disk 0 8.3.0 disc3 CLAIMED DEVICE HP C2247M1
/dev/dsk/c0t3d0 /dev/floppy/c0t3d0 /dev/rdsk/c0t3d0 /dev/rfloppy/c0t3d0
disk 1 8.4.0 disc3 CLAIMED DEVICE HP C2247M1
/dev/dsk/c0t4d0 /dev/floppy/c0t4d0 /dev/rdsk/c0t4d0 /dev/rfloppy/c0t4d0
disk 3 8.6.0 disc3 CLAIMED DEVICE HP C2247M1
/dev/dsk/c0t6d0 /dev/floppy/c0t6d0 /dev/rdsk/c0t6d0 /dev/rfloppy/c0t6d0
disk 4 24.0.0 disc3 CLAIMED DEVICE HP C2430D
/dev/dsk/c1t0d0 /dev/floppy/c1t0d0 /dev/rdsk/c1t0d0 /dev/rfloppy/c1t0d0
disk 5 24.1.0 disc3 CLAIMED DEVICE HP C2430D
/dev/dsk/c1t1d0 /dev/floppy/c1t1d0 /dev/rdsk/c1t1d0 /dev/rfloppy/c1t1d0
disk 7 52.2.0 disc3 CLAIMED DEVICE TOSHIBA CD-ROM XM-5401TA
/dev/dsk/c3t2d0 /dev/floppy/c3t2d0 /dev/rdsk/c3t2d0 /dev/rfloppy/c3t2d0
disk 8 52.5.0 disc3 CLAIMED DEVICE HP C3010M1
/dev/dsk/c3t5d0 /dev/floppy/c3t5d0 /dev/rdsk/c3t5d0 /dev/rfloppy/c3t5d0
disk 9 52.6.0 disc3 CLAIMED DEVICE HP C2247M1
/dev/dsk/c3t6d0 /dev/floppy/c3t6d0 /dev/rdsk/c3t6d0 /dev/rfloppy/c3t6d0
===========================================

a1124158:root ioscan -fnkC disk|more
Class I H/W Path Driver S/W State H/W Type Description
==============================================================
disk 0 8.3.0 disc3 CLAIMED DEVICE HP C2247M1
/dev/dsk/c0t3d0 /dev/floppy/c0t3d0 /dev/rdsk/c0t3d0 /dev/rfloppy/c0t3d0
disk 1 8.4.0 disc3 CLAIMED DEVICE HP C2247M1
/dev/dsk/c0t4d0 /dev/floppy/c0t4d0 /dev/rdsk/c0t4d0 /dev/rfloppy/c0t4d0
disk 3 8.6.0 disc3 CLAIMED DEVICE HP C2247M1
/dev/dsk/c0t6d0 /dev/floppy/c0t6d0 /dev/rdsk/c0t6d0 /dev/rfloppy/c0t6d0
disk 4 24.0.0 disc3 CLAIMED DEVICE HP C2430D
/dev/dsk/c1t0d0 /dev/floppy/c1t0d0 /dev/rdsk/c1t0d0 /dev/rfloppy/c1t0d0
disk 5 24.1.0 disc3 CLAIMED DEVICE HP C2430D
/dev/dsk/c1t1d0 /dev/floppy/c1t1d0 /dev/rdsk/c1t1d0 /dev/rfloppy/c1t1d0
disk 7 52.2.0 disc3 CLAIMED DEVICE TOSHIBA CD-ROM XM-5401TA
/dev/dsk/c3t2d0 /dev/floppy/c3t2d0 /dev/rdsk/c3t2d0 /dev/rfloppy/c3t2d0
disk 8 52.5.0 disc3 CLAIMED DEVICE HP C3010M1
/dev/dsk/c3t5d0 /dev/floppy/c3t5d0 /dev/rdsk/c3t5d0 /dev/rfloppy/c3t5d0
disk 9 52.6.0 disc3 CLAIMED DEVICE HP C2247M1
/dev/dsk/c3t6d0 /dev/floppy/c3t6d0 /dev/rdsk/c3t6d0 /dev/rfloppy/c3t6d0
====================================

I didn't get any message regardis dik failure.

Thanks and regards,
Rahul

Re: disk issue

Sunil Sheoran — Mon, 29 Mar 2010 07:22:43 GMT

Hi Rahul.

It seems that your disk is getting senced by system but system is not able to read this disk. Because of Disk failure.
You can still confirm this using dd command.

#dd if=/dev/dsk/c0t5d0 of=/dev/null bs=1024k

Can you check some errors in syslog.log file like lbolt error or some parity errors.

Thanks & Regards
Sunil Sheoran

Re: disk issue

Johnson Punniyalingam — Mon, 29 Mar 2010 07:47:33 GMT

vgbroot.>>

It would be better to post "vgdisplay " o/p, better that ..? did you activated VG .. ?

vgchange -a y /dev/vgbroot
vgdisplay -v /dev/vgbroot |more

Re: disk issue

Rkumar — Mon, 29 Mar 2010 08:28:22 GMT

Dear experts,
This is for ur purpose...
===========================

a1124158:root vgdisplay -v vgbroot
vgdisplay: Volume group not activated.
vgdisplay: Cannot display volume group "vgbroot".

a1124158:root vgchange -a y vgbroot
vgchange: Warning: Couldn't attach to the volume group physical volume "/dev/dsk/c0t5d0":
The path of the physical volume refers to a device that does not
exist, or is not configured into the kernel.
vgchange: Warning: couldn't query physical volume "/dev/dsk/c0t5d0":
The specified path does not correspond to physical volume attached to
this volume group
vgchange: Couldn't query the list of physical volumes.
vgchange: Couldn't activate volume group "vgbroot":
Quorum not present, or some physical volume(s) are missing.

Rahul

Re: disk issue

Johnson Punniyalingam — Mon, 29 Mar 2010 09:00:55 GMT

possible disk failure

# dmesg
# more /var/adm/syslog/syslog.log
# cd /var/opt/resmon/log/
# more event.log
(from event.log check any message refering to disk problem "c0t5d0")

you try scanning them again.

# ioscan -fn

# insf -e

# ioscan -fnC disk

Re: disk issue

chris huys_4 — Mon, 29 Mar 2010 10:30:08 GMT

Hi Rahul,

If ioscan -fn, is not showing the disk, c0t5d0, at all, i.e. even not in "NO HW" state, then the disk was not "found" even at bootup of the system, when the iotree gets build.

So or there is a hardware problem "leading to the disk", scsi cable problem/diskproblem, or there is no disk with scsi id#5 anylonger physically in the storage.

In both cases, someone should get onsite to physically check it out...

Greetz,
Chris