HP Smart Array P600-Controller - Manual (Page 38)

38 HP Smart Array P600 Controller for Integrity Servers User Guide
Adding drives
You can add hard drives to a system at any time, as long as you do not exceed the
maximum number of drives that the controller supports. You can then either
build a new array from the added drives or use the extra storage capacity to
expand the capacity of an existing array.
To perform an array capacity expansion, use ACU. If the system is using hot-
pluggable drives, you can expand array capacity without shutting down the
operating system (that is, with the server online) if ACU is running in the same
environment as the normal server applications. (For more information, refer to
the HP Array Configuration Utility User Guide.)
The expansion process is illustrated in the following figure, in which the original
array (containing data) is shown with a dashed border and the newly added drives
(containing no data) are shown unshaded. 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. This process liberates some storage capacity on
each of the physical drives in the array. During this procedure, the logical drives
each keep the same fault-tolerance method in the enlarged array that they had in
the smaller array.