no hdisk available , only pdisk 1

[RMGBELGIUM]

Hi all,

My company has bought some SSA disks secondhand, and when I installed the disks in the drawer, and I run cfgmgr, the only thing AIX finds is a pdisk.No hdisk.
I've tried locating the disks in another SSA loop attached to a different server, same story.
I did a format of one of the disks, it stopped at 39% , telling me I should run a diagnostics.Ran a diag, did a certify , no problem detected.In the errorreport : 3 entries DISKOPERATION ERROR
Anyone seen this kind of behaviour before?
I haven't got a clue to which OS the disks were once attached ( could be AS400,windows,AIX, .... )

lscfg -vl pdisk0 returns :

pdisk0 U0.1-P1-I2/Q1-W40AABB8F8000D SSA160 Physical Disk Drive (35900 MB)

Manufacturer................IBM
Machine Type and Model......DMVC36B
Part Number.................18P2199
ROS Level and ID............0066
Serial Number...............F80FF4FA7K
EC Level....................F25900
Device Specific.(Z2)........CUSNA066
Device Specific.(Z3)........18P2199
Device Specific.(Z4)........01295


If I do a lscfg -vl for another pdisk same type in the same drawer, it gives :

pdskB309 USSAB03-D9 SSA160 Physical Disk Drive (36400 MB)

Manufacturer................IBM
Machine Type and Model......DMVC36B
Part Number.................18P2199
ROS Level and ID............0070
Serial Number...............F80D65B37K
EC Level....................F25900
Device Specific.(Z2)........CUSNA070
Device Specific.(Z3)........18P2199
Device Specific.(Z4)........01241




The big difference I notice is :

pdisk0 U0.1-P1-I2/Q1-W40AABB8F8000D SSA160
pdskB309 USSAB03-D9 SSA160 Physical Disk Drive

It looks like the enclosure cannot identify that disk or so?

Thx in advance,

Regards,

RMGBelgium

 

[xmubeta]

I am puzzled. Why don't you use smit ssadisk or smit ssaraid to manage disks of ssa. Do u change the use of every new disk?

 

[p5wizard]

could be an ex-ssaraid disk - turn it into a non-raid disk first. smit ssaraid I guess.

HTH,

p5wizard

 

[hirschaj]

You might want to try clearing the disks using "dd if=/dev/zero of=/dev/pdisk#" You can break out of the dd process after a minute and any header information on the disk will be gone, maybe then you might be able to get a full format in. I don't think it can really hurt anything since you have no access to the disks anyway.


Jim Hirschauer

http://www.aixexpert.com