Specifications

Recovering from Hard Drive Failure
89MSA1000 Reference Guide
Note: If you are running Windows 2000 with Microsoft Cluster Services (MSCS),
logical drive extensions are not recommended. MSCS requires that disks be configured
as BASIC in logical disk manager. In order to take advantage of logical drive extension,
your drives would have to be configured as DYNAMIC when the volume is initially
created. Because of the differences in requirements for the MSCS and the Logical drive
extension feature, we recommend you do not perform a logical drive extension on a
storage enclosure that is part of a Microsoft Cluster.
The expansion process is illustrated in the figure below where the original array
(containing data) is shown with a dashed border, and the newly added drives are
shown unshaded (they contain no data). The array controller redistributes the
original logical drive over the enlarged array, using the same fault-tolerance
method. The unused capacity on the new (enlarged) array can then be used to
create an additional logical drive, with a different fault tolerance setting if
necessary. Alternatively, the extra capacity can be used to increase the size of the
original logical drive (capacity extension).
Figure 33: Array capacity expansion
If you are expanding an array that has several logical drives, data will be
redistributed one logical drive at a time. Newly created logical drives will not
become available until capacity expansion has finished.
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