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newly added disk to system

Amit Manna_5

newly added disk to system

I have a HP Unix 11.0 system which has DGC array attached to it. Storage team has added 256 GB to it and made RAID 1 so 128 GB was allocated to the system.
I asked storage to present 16 GB * 8 LUNs.

Now in dmesg i can see below 0/8/0/ sdisk
0/8/0/ sdisk
1/8/0/ sdisk
1/8/0/ sdisk

Does it mean two LUNs are assigned?

ioscan -fnH 0/8/0/
Class I H/W Path Driver S/W State H/W Type Description
disk 25 0/8/0/ sdisk NO_HW DEVICE DGC C4400WDR1
/dev/dsk/c5t1d2 /dev/rdsk/c5t1d2

please advice.

Fabio Ettore
Honored Contributor

Re: newly added disk to system


it could be that you have 2 LUNs with each one with 2 paths, please post ioscan -fn.
Anyway you have also NO_HW which is not a good point, system could have problems to recognise the new added devices.

Best regards,
Steven E. Protter
Exalted Contributor

Re: newly added disk to system


ioscan -fnC disk

At this point I would say the new LUN is nor properly divided or assigned.

insf -C disk

Reboot. That might make the disk recognized.

What has been presented so far is one gigantic disk.

Steven E Protter
Owner of ISN Corporation
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
Ganesan R
Honored Contributor

Re: newly added disk to system


First get the confirmation from the storage team that they assigned the LUN's to this host properly.

After that run ioscan and insf -ev to get the LUN's recognised. Then see if the disk's are showing in ioscan -funC disk

The message from dmesg buffer might be little old. Don't rely on that.
Best wishes,

Johnson Punniyalingam
Honored Contributor

Re: newly added disk to system

Hi Amit ,

I would also like to check,

# insf -e
# cd /dev/rdsk
# ls -lrt
will show recerntly added "LUN"

Problems are common to all, but attitude makes the difference