====== List and change RAID array on AIX ======


List disks into a **SAS RAID** adapter (Hardware):
<cli prompt='>'>
[root@aixfvb01] /root > sissasraidmgr  -L -j1 -l sissas0
------------------------------------------------------------------------
Name      Resource  State       Description              Size
------------------------------------------------------------------------
sissas0   FEFFFFFF  Available   PCIe3 x8 SAS RAID Internal Adapter 6Gb

hdisk1    FC0000FF  Optimal     RAID 0 Array           283.8GB
 pdisk1   0009FFFF  Active      Array Member           283.8GB

hdisk0    FC0100FF  Optimal     RAID 0 Array           283.8GB
 pdisk0   0008FFFF  Active      Array Member           283.8GB
</cli>


List disks into a **SCSI RAID** adapter (Hardware):
<cli prompt='>'>
[root@aixfvb01] /root > sisraidmgr -L -j1 -l sisioa0
------------------------------------------------------------------------
Name      Location      State       Description        Size                  
------------------------------------------------------------------------
sisioa0   04-08         Available   PCI-X Dual Channel U320 SCSI RAID Adapter
 scsi2    04-08-00-07,0 NoLink      No remote adapter target
 scsi3    04-08-01-07,0 NoLink      No remote adapter target

hdisk0    04-08-ff-0,0  Optimal     RAID 10 Array    142.8GB                 
 pdisk2   04-08-00-3,0  Active      Array Member     142.8GB                 
 pdisk4   04-08-01-3,0  Active      Array Member     142.8GB                 

hdisk1    04-08-ff-0,1  Optimal     RAID 10 Array    142.8GB                 
 pdisk0   04-08-00-4,0  Active      Array Member     142.8GB                 
 pdisk5   04-08-01-4,0  Active      Array Member     142.8GB                 

pdisk3    04-08-00-8,0  Active      Hot Spare        142.8GB                 
pdisk7    04-08-01-8,0  Active      Hot Spare        142.8GB                 

hdisk7    04-08-00-5,0  Available   16 Bit LVD SCSI  146.8GB                 
hdisk8    04-08-01-5,0  Available   16 Bit LVD SCSI  146.8GB  
</cli>

Rebuild a raid device (reconstructs a degraded array):
<cli prompt='>'>
[root@aixfvb01] /root > sisraidmgr -R -z 'pdisk0 pdisk1'
</cli>

Resynchronizes array protection.
<cli prompt='>'>
[root@aixfvb01] /root > sisraidmgr -Y -l hdisk1
</cli>

Delete a raid disk:
<cli prompt='>'>
[root@aixfvb01] /root > sisraidmgr -Dl sisioa0 -d hdisk0
</cli>

Creates stand-alone physical disks. Delete a pdisk an reformat to convert to hdisk (take about 30min for a 145GB disk):
<cli prompt='>'>
[root@aixfvb01] /root > sisraidmgr -U -z pdisk2
[root@aixfvb01] /root > sisraidmgr -U -z pdisk4
</cli>

Format a SAS pdisk
<cli prompt='>'>
[root@aixfvb01] /root > sissasraidmgr -F -z pdisk2
</cli>


<code>
SAS Disk Array Management

Cause
 

- General Help:
# sissasraidmgr -h

- Viewing the Disk Array Configuration:
# sissasraidmgr -Ll controller_name -j1

- Preparing Disks for Use in SAS Disk Arrays:
# sissasraidmgr -P -z disk_list
(For example, # sissasraidmgr -P -z hdisk1 hdisk2 pdisk3 pdisk4)

- Changing pdisks to hdisks:
# sissasraidmgr -U -z pdisk_list

- Creating a SAS Disk Array:
# sissasraidmgr -C -r raid level -s  stripe size -z pdisk_list

- Deleting a SAS Disk Array:
# sissasraidmgr -D -l controller name -d array_name

- Adding Disks to an Existing Disk Array:
# sissasraidmgr -A -l array name -z pdisk list

- Creating Hot Spare Disks:
# sissasraidmgr -H -z pdisk_list

- Deleting Hot Spare Disks:
# sissasraidmgr -I -z pdisk_list

- Displaying Rechargeable Battery Information:
# sissasraidmgr -M -o0 -l adapter_name

- Forcing a Rechargeable Battery Error:
# sissasraidmgr -M -o1 -l adapter_name

- Recovering from Disk Failures:
# sissasraidmgr -R -z pdisk_list

- Viewing the SAS device resource locations:
# sissasraidmgr -Z –o0 –j3 -l adapter_name

- Viewing the SAS device resource information:
# sissasraidmgr -Z –o1 –j3 -l adapter_name

- Viewing the SAS path information for the attached device:
# sissasraidmgr -T –o1 –j3 -l device_name

- Viewing the SAS path information graphically for the attached device:
# sissasraidmgr -T –o0 –j3 -l device_name
</code>



==== Unable to see an hdisk ====

After replacing a disk, you don't see an available hdisk, it stays defined

Delete the array and recreate it
  --> smitty device
  --> Disk Array
  --> IBM SAS Disk Array
  --> IBM SAS Disk Array Manager
  --> delete a SAS Disk Array
   --> select the controler
   --> select the bad disk (without right size)
   --> [Enter]

  --> Create a SAS Disk Array
   --> select the controler
   --> select the RAID type (select 0 for no RAID)
   --> choose the array