48
5.13.3. Identifying SAS disk units in different DSMs
The two DSMs in a BladeCenter S can be distinguished by their serial numbers. Each SAS drive,
or hdisk in VIOS, carries a portion of its DSM serial number in its physical location code. To
locate the serial numbers of the DSMs:
•
Start a browser session to the AMM and sign in with an administrator ID
•
Click
Hardware VPD
in the menu options on the left
•
Scroll down to the
Storage
section and check the
FRU Serial No.
column for each
Storage Module.
The serial number will be similar to
YK12907CM0Z9
The last 7 characters of the DSM serial number (07CM0Z9, in this case) will be reflected in the
physical location code of the SAS drives in VIOS. To locate the location code for a SAS drive, or
hdisk, in VIOS and identify in which DSM it is located:
•
Start an IVM browser session to VIOS and sign in with
padmin
•
Click
View/Modify Virtual Storage
•
Click
Physical Volumes
and check the
Physical Location Code
column for each hdisk.
The location code will be similar to
U4545.001.
07CM0Z9
-P1-D2
The location code for the hdisk in VIOS also identifies the position of the SAS drive in the DSM.
D2
is the second drive, left to right, in the top row in the DSM.
5.13.4. Configuring mirroring
When assigning hdisks to the IBM i partition during creation (see section 5.10), select only two
hdisks with locations signifying they are from different DSMs. For example,
U4545.001.07CM0Z9-P1-D2 and U4545.001.07CM0YT-P2-D2. Mirroring does not have to be
configured between drives in the same position in each DSM.
Once IBM i LIC is installed on one of these hdisks (see section 5.10), add the second one to the
System ASP:
•
Sign into Dedicated Service Tools (DST) with QSECOFR
•
Choose option 4 to work with disk units
•
Choose option 1 to work with the disk unit configuration
•
Choose option 3 to work with the ASP configuration
•
Choose option 3 to add units to ASPs
•
Choose option 3 to add units to existing ASPs
•
Specify ASP 1 for the new disk unit and press
Enter
•
Confirm
with
Enter
, or with
F10
and then
Enter
To start mirroring:
•
Sign into Dedicated Service Tools (DST) with QSECOFR
•
Choose option 4 to work with disk units
•
Choose option 1 to work with the disk unit configuration
•
Choose option 2 to start mirrored protection
•
Select the System ASP and press
Enter
•
Confirm
with
Enter
and
F10
To include additional SAS drives in the mirrored configuration:
