Promise Technology VTRAK E610f Product Manual page 142

VTrak E-Class Product Manual
For more information on axles, see "RAID 50 Axles" on page 238 or "RAID
60 Axles" on page 240.
8. Enter a capacity and select unit of measure (MB, GB, TB).
The default value is the available capacity of the disk array. You can use this
value or any lesser amount.
9. From the Stripe dropdown menu, select a Stripe size for this logical drive.
The choices are 64 KB, 128 KB, 256 KB, 512 KB, and 1 MB. 64 KB is the
default. See "Choosing Stripe Size" on page 245.
10. From the Sector dropdown menu, select a Sector size for this logical drive.
The choices are 512 B, 1 KB, 2 KB, and 4 KB. 512 B is the default. See
"Choosing Sector Size" on page 245.
11. From the Read Policy dropdown menu, select a Read Cache policy for this
logical drive.
The choices are Read Cache, Read Ahead, and No (read) Cache. Read
Ahead is the default. See "Cache Policy" on page 246.
12. From the Write Policy dropdown menu, select a Write Cache policy for this
logical drive.
The choices are Write Through (thru) and Write Back. Write Back is the
default. If you selected No Cache under Read Cache, this setting will be
Write Through. See "Cache Policy" on page 246.
13. From the Preferred Controller ID dropdown menu, select a controller.
The choices are Controller 1 or 2, or Automatic. This feature is only available
on subsystems with two controllers and LUN Affinity enabled.
14. Click the Update button to enter the logical drive parameters.
15. Review the results. If there is remaining space the disk array, you can create
another logical drive, following the steps above. Each logical drive can have
a different set of parameters.
16. Click the Next button when you are done.
A new window displays with the disk array information and the proposed
logical drives with their parameters.
17. Click the Submit button create the logical drives.
The new logical drive appears in the Logical Drive List the Information tab.
If you created a fault-tolerant logical drive (any RAID level except RAID 0), the
Operational Status of new logical drive will display Synchronizing for several
minutes after creation. You can use the logical drive during this period but read/
write performance could be slower than normal.
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