HP XU - Manual (Page 147)

English 131
4 Technical Information
Using the ArrayConfig Program
CAUTION
A warning appears if you select an array that has partitions. Do not
initialize an array with partitions if it contains data you want to keep,
because any existing data will be erased. Be especially careful not to
initialize your boot array!
5 When the Select Format Mode menu appears, select Initialize Array to
Zero (recommended) or Low-Level Format .
6 When the list of block sizes appears, select a block size. The
allowable block sizes are 8, 16, 32, 64 (the default), or 128 KBytes.
(This menu does not appear if the array is a RAID 1 array with only
two drives.) The default block size gives the best overall
performance. Formatting begins immediately.
7 When you see the message Initialization of [array name] is complete, press
any key to return to the Disk Array Operations menu.
NOTE
You will need to install the operating system after the array is initialized.
Refer to “Installing Windows NT 4.0” on page 124.
Adding and Deleting Spares
Dedicated spare disks (spares) are an important data protection and
real-time recovery feature of RAID 1 arrays (RAID 0 arrays do not
support spares). Up to two dedicated spares can be defined for each
array. If a disk in an array fails while the computer is running, a spare is
activated immediately to take its place. The array software
automatically reconstructs the necessary data on the new disk, and
array operation continues uninterrupted.
Adding a Dedicated Spare
When you create an array you have the option of adding one or two
dedicated spares. You can also add dedicated spares to an existing
array at a later time. You cannot add dedicated spares to an array if:
• The array already has two dedicated spares
• The remaining single disks are not at least as large as the smallest
disk in the selected array
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