Viewing IBM SAS disk array settings
This procedure enables you to view SAS disk array attributes and settings.
To view the settings for a IBM® SAS
Disk Array, complete the following steps:
- Start the IBM SAS Disk Array Manager by following the steps in Using the Disk Array Manager.
- Select the Change/Show Characteristics of a SAS Disk Array option.
- Select the desired IBM SAS Disk Array.
A SMIT dialog screen displays
the attributes of the selected array. The output displayed will be
similar to the following:
+--------------------------------------------------------------------------------+
| Change/Show Characteristics of a SAS Disk Array |
| |
|Type or select values in entry fields. |
|Press Enter AFTER making all desired changes. |
| |
| [Entry Fields] |
| Disk Array hdisk8 |
| Description SAS RAID 6 Disk Array |
| Status Available |
| Location 05-08-00 |
| Serial Number |
| Physical volume identifier none |
| Queue DEPTH 16 |
| Size in Megabytes 69797 |
| RAID Level 6 |
| Stripe Size in KB 256 |
| |
| |
| |
| |
| |
| |
|F1=Help F2=Refresh F3=Cancel F4=List |
|F5=Reset F6=Command F7=Edit F8=Image |
|F9=Shell F10=Exit Enter=Do |
+--------------------------------------------------------------------------------+- The Physical volume identifier field is a unique value assigned to the hdisk if the disk array is a member of a volume group. If the disk array is not a member of a volume group, this field value is none.
- The Queue DEPTH field is the depth of the command queue used for this disk array. For more information, see Drive queue depth
- The Size in Megabytes field represents the usable capacity of the disk array. For information about calculating capacities for each RAID level, see Supported RAID levels.
- The RAID Level field is the level of protection chosen for this array.
- The Stripe Size in KB field is the number of contiguous kilobytes that will be written to a single disk before switching to the next disk in the disk array. It provides the host with a method to tune data striping according to the typical I/O request size.
You cannot change any of the attributes on this screen. The RAID level and stripe size must be specified when the array is created.
