User's Manual

Hard Drive Installation and Replacement
HP Smart Array 641/642 Controller User Guide E-11
HP CONFIDENTIAL
Writer: John Turner File Name: m-appe hard drive installation & replacement
Codename: darkmatter - antimatter Part Number: 309311-001 Last Saved On: 11/7/02 5:07 PM
2. Replace any drive. The data on the new drive is re-created from redundant
information on the remaining drives.
CAUTION: Do not replace any other drive until data rebuild on this drive is
complete.
3. When data on the new drive has been rebuilt (the Activity LED is no longer
illuminated), repeat the previous step for the other drives in the array, one at a
time.
When all drives have been replaced, you can use the extra capacity to create new
logical drives or extend existing logical drives.
Expanding and Extending Capacity
Array capacity expansion is the addition of physical drives to an array and the
redistribution of the pre-existing logical drives over the enlarged array.
Capacity expansion is carried out using one of the utilities described in Chapter 5.
For reconfiguration to occur online (that is, without shutting down the operating
system), the configuration utility must be running in the same environment as the
normal server applications. Also, online expansion is possible only in systems that
are using hot-pluggable drives.
The expansion process is illustrated in Figure E-2, where the original array
(containing data) is shown with a dashed border, and the newly added drives are
shown unshaded (containing no data). The array controller adds the new drives to the
array and redistributes the original logical drives over the enlarged array, one logical
drive at a time. Each logical drive keeps the same fault-tolerance method in the
enlarged array that it had in the smaller array.