HP Surestore Disk Array 12h and FC60 - Manual (Page 292)

292 Managing the Disk Array Using Array Manager 60
Identifying Disks
Binding a LUN requires the use of unassigned disks. If you are not sure which disks are
unassigned, you can determine which disks are available.
To identify unassigned disks, type
amdsp -d <ArrayID>
The status of all disks in the array will be returned. The information includes the disk group
the disk is a member of. Disks in the Unassigned disk group can be used for binding a LUN.
You may want to print the information or write down the unassigned disks before you
begin binding the LUN.
Calculating LUN Capacity
Before actually binding a LUN, you may want to calculate how much capacity will be
available for a given set of configuration values. This command does not bind a LUN; it
simply returns the capacity that would be available if you had bound a LUN using the
values provided. You can alter the settings to see how LUN capacity is affected until you get
the desired results. Using this command before you bind a LUN will ensure that you
achieve the correct capacity.
To calculate the capacity of a LUN, type:
amcfg -C -d channel:ID,channel:ID... -r <RAIDlevel>
-s <stripe> <ArrayID>
• RAIDlevel - the RAID level used for the LUN. Valid RAID levels are 1, 0/1, and 5.
• stripe - the size of the stripe element in Kbytes.
Command Example
The following example calculates the capacity of a RAID 5 LUN using four disks and a
stripe element size of 16 Kbytes.
amcfg -C -d 1:1,2:3,3:1,4:2 -r 5 -s 16 0000005EBD20