Hard Drive Installation and Replacement

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.

HP Smart Array 641/642 Controller User Guide

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