User guide

Array Configuration Utility (ACU)
107Modular SAN Array 1000 User Guide
Note: The expansion process takes about 15 minutes per gigabyte, or considerably
longer if the controller does not have a battery-backed cache. While array expansion is
taking place, no other expansion, extension, or migration can occur simultaneously on
the same controller.
1. Click Controller Settings and check that the expand priority setting is
acceptable.
2. Back up all data on the array.
Although array expansion is unlikely to cause data loss, observing this
precaution provides additional data protection.
3. Click Expand array and click Begin.
4. Choose the array that you want to expand and click Next.
5. Select the physical drives that you want to add to the array and click Next.
6. Click Finish to accept the changes.
At this point (before clicking Save in the next step), you can create logical
drives on the unused space created by the expansion. You can also arrange to
expand another array on the same controller by repeating the previous steps.
However, the controller can expand only one array at a time; remaining array
expansions are queued.
7. Click Save.
The controller now rearranges (re-stripes) the existing logical drives and their
data so that they extend over all the physical drives in the enlarged array.
To check the progress of an array expansion, click the icon for that array in the
Configuration View window. A More Information popup window is displayed
that lists the drive status.
230941-005_MSA1000_UG.book Page 107 Thursday, April 17, 2003 5:53 PM