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, do the following:

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.
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.