Replaced pdisk not showing up in SAS Disk Array Configuration

UNIX AIX
1 
OSLevel: 5300-10-02-0943
System Model: IBM,8203-E4A
Power 6
==

Hi!
I replaced a failed pdisk in the raid enclosure as follows,

- rmdev -l 'pdisk18' '-d'
- Replaced it.
- cfgmgr  (detected)
  • I can see the new drive, with the correct serial #
lscfg -v -l pdisk18
pdisk18 U5886.001.P15R082-P1-D3 Physical SAS Disk Drive

Manufacturer................IBM 
Machine Type and Model......ST3300656SS 
FRU Number..................10N7208 
ROS Level and ID............45363043
Serial Number...............3QP2CYYW

However, when trying to Create an Array Candidate pdisk and Format to 528 Byte Sectors it doesn't show up.
==
 Create an Array Candidate pdisk and Format to 528 Byte Sectors     
                                                                              
                       │   pdisk22   00000600  Active      Array Candidate        283.8GB         │
                       │   pdisk23   00000700  Active      Array Candidate        283.8GB         │
                       │   pdisk24   00000800  Active      Array Candidate        283.8GB         │
                       │   pdisk25   00000900  Active      Array Candidate        283.8GB   

===
Neither in the array conf:

sissas3   FFFFFFFF  Primary     PCI-X266 Ext Tri-x4 3Gb SAS RAID Adapter
 sissas2  00000000  AWC linked  Redundant cache protection for sissas3

hdisk9    00FF0000  Degraded    RAID 10 Array          851.4GB
 pdisk21  00000500  Active      Array Member           283.8GB
 pdisk27  00000B00  Active      Array Member           283.8GB
 pdisk17  00000100  Active      Array Member           283.8GB
 pdisk20  00000400  Active      Array Member           283.8GB
 pdisk16  00000000  Active      Array Member           283.8GB
 pdisk19  00000300  Active      Array Member           283.8GB

pdisk24   00000800  Active      Array Candidate        283.8GB
pdisk22   00000600  Active      Array Candidate        283.8GB
pdisk23   00000700  Active      Array Candidate        283.8GB
pdisk25   00000900  Active      Array Candidate        283.8GB
pdisk26   00000A00  Active      Hot Spare              283.8GB
pdisk18   00000200  Missing     Disk                   283.8GB

I will appreciate your help,

Thank you,

2

I'll start by stating that I'm not an AIX person and I'm not familiar with the RAID controller you have there. I am a storage person.

However, with a part number of ST3300656SS that is not a disk manufactured by IBM; it is OEM'd from Seagate.

I'm well aware that Seagate disks of the exact same part number can have a slightly different LBA count and when the LBA count is less than the existing RAID members, the RAID controller refuses to configure it. So just be aware and don't fall for that one.

Check that the LBA's on the disk you replaced is at least equal, or more than, the existing RAID members.

EDIT: The total LBA's (Logical blocks) are usually written on the disk label.

2 Likes
3

I used a different model (HUS153030VLS300) and it worked,

Thank you for the suggestion,

Regards