topic Re: HDD problem in Operating System - HP-UX

HDD problem

Fadia Almarei — Mon, 18 Feb 2008 08:23:32 GMT

Dear All

I have the following error in my HP-UX 11.11 system in one of my disks
:The Logical Volume Manager shows this device file, /dev/dsk/c5t8d0,
with hardware path, 10/6/3/0.8.0, as belonging to Volume Group, vg00.
SAM has determined that this hardware path is not currently active
because either the device is disconnected, or this is not the primary
path to a multiple path physical volume. This results in incorrect
disk utilization information in the Disk Devices and Volume Group
lists."

i need to know the cause of the problem and how to solve it.
BR;
Fadia Almarei

Re: HDD problem

Ramesh S — Mon, 18 Feb 2008 08:28:09 GMT

Hi

PLease try the following:

# ioscan -fnC disk | grep -i c5t8d0
Check the disk is CLAIMED

# diskinfo /dev/rdsk/c5t8d0
check the disk sizes and Block size.

# dd if=/dev/rdsk/c5t8d0 of-/dev/null bs=1024k count=1000
Check te integrity of disk.

# pvdisplay /dev/dsk/c5t8d0
Check the PV status -- AVAILABLE
Check the Alternate lin available or not.

# Check the related errors in /var/adm/syslog/syslog.log as well.

Thanks & Regards

Ramesh

Re: HDD problem

Fadia Almarei — Mon, 18 Feb 2008 08:37:44 GMT

(napfep01:/)# ioscan -funC disk | grep -i c5t8d0
/dev/dsk/c5t8d0 /dev/rdsk/c5t8d0
(napfep01:/)# diskinfo /dev/rdsk/c5t8d0
diskinfo: can't SIOC_INQUIRY /dev/rdsk/c5t8d0: No such device or address
(napfep01:/)# dd if=/dev/rdsk/c5t8d0 of-/dev/null bs=1024k count=1000
dd: bad arg of-/dev/null
(napfep01:/)# dd if=/dev/rdsk/c5t8d0 of=/dev/null bs=1024k count=1000
(the green line is lighting)

(napfep01:/)# pvdisplay /dev/dsk/c5t8d0
--- Physical volumes ---
PV Name /dev/dsk/c5t8d0
VG Name /dev/vg00
PV Status unavailable
Allocatable yes
VGDA 2
Cur LV 18
PE Size (Mbytes) 8
Total PE 4340
Free PE 1855
Allocated PE 2485
Stale PE 695
IO Timeout (Seconds) default
Autoswitch On

Re: HDD problem

Ramesh S — Mon, 18 Feb 2008 09:05:49 GMT

Hi

You haven't posted the "dd" output.It should give you "1000 recoed in and 1000 record out".

However, PV status is unavailable and 695 stale extents are there.

Sounds like a BAD DISK.

Thanks & Regards

Ramesh

Re: HDD problem

Shrikant Lavhate — Tue, 19 Feb 2008 09:42:17 GMT

BAD DISK... hmmmmm
try this thing
http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf

I recommend to have Ignite backup with you before you proceed.