A disk array is created using a set of disks that are formatted
for advanced function.
Disk arrays with data redundancy (RAID 5, 6, 10, 5T2, 6T2,
and 10T2) are unprotected until parity is finished being built. For
disk arrays with no data redundancy (RAID 0), no parity is calculated
and the array is built immediately.
Complete the following steps
to create an IBM® SAS RAID disk
array:
- Run the iprconfig utility by typing iprconfig.
- Select Work with disk arrays.
- Select Create a disk array.
- Select the controller under which you would like to create
a disk array, and then press Enter.
- Select the disk units to be included in the disk array, and then press Enter. If the disks do not have a status of Zeroed, first format them using the
instructions provided at Formatting to advanced function. Formatting the disks reduces
the overall RAID creation time and ensures the RAID array is fully optimized following RAID
creation. The information that you see will be similar to the following
screen:
+--------------------------------------------------------------------------------+
| |
| Select Protection Level and Stripe Size |
| |
| Default array configurations are shown. To change |
| setting hit "c" for options menu. Highlight desired |
| option then hit Enter |
| |
| c=Change Setting |
| |
|Protection Level . . . . . . . . . . . . : RAID 5 |
|Stripe Size . . . . . . . . . . . . . . : 256 k |
|Queue Depth (default = 12). . . . . . . : 12 |
| |
| |
| |
| |
| |
| |
| |
|Press Enter to Continue |
| |
|e=Exit q=Cancel |
+--------------------------------------------------------------------------------+
- Select the protection level that you want for the array. For more information about selecting an appropriate RAID level,
see Supported RAID levels.
- Select the stripe size that you want, in kilobytes, for
the array. For more information about selecting an appropriate
stripe size, see Stripe-unit size.
- Press Enter to continue.
Attention: All
data on the selected drives will be lost when the disk array is created.
If you are sure you want to create the disk array, press Enter. If
you do not want to create the disk array, type q to
cancel.
If you choose to create the disk array, a status
screen is displayed until the operation is completed. If you want
to create additional disk arrays, you can exit the status screen by
typing e.
When a disk array has been built, it is available to Linux like any SCSI disk. To find
the resource name that has been assigned to the disk array, see the
Display
Disk Array Status screen.
Note: Resource names (such as /dev/sdb)
might change as a result of creating a new disk array. This could
affect kernel command line entries and fstab entries. You might want
to reboot the server now.
