HP 5300 - Manual (Page 128)

Hard Drive Installation and Replacement
HP Smart Array 5300 Controller User Guide E-11
HP CONFIDENTIAL
Writer: Jennifer Hayward File Name: o-appe hard drive installation and replacement
Codename: SilverHammer Part Number: 135606-005 Last Saved On: 10/8/02 11:22 AM
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.
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.
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Figure E-2: Array capacity expansion
The unused capacity on the enlarged array can now be used to create an additional
logical drive, with a different fault-tolerance setting if necessary.
Alternatively, the unused capacity can be used to increase the size of one of the
original logical drives; this process is logical drive capacity extension. Another
method for carrying out logical drive capacity extension is to delete an existing
logical drive and then to add the freed capacity to another logical drive.