Integrated HP NetRAID Controller Config. Guide

Chapter 4 Planning
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• Decide the rebuild rate
• Plan logical drives
Plan Your Non-Hot-Swap Devices
For HP NetServer LH 3/3r and LH 4/4r, if you plan to enable integrated
HP NetRAID on SCSI B, you need to decide how to use any non-hot-swap SCSI
devices on the SE connector.
For HP NetServer LT 6000r, you need to decide how to use any non-hot-swap
SCSI devices on the external SCSI B channel.
For each of these non-hot-swap devices, log its array number in Worksheet A.
• Non-hot-swap drives can be used alone, as the only disk in the array.
• Non-hot-swap drives can be used in an array with other non-hot-swap
drives of the same capacity.
For performance reasons, do not use non-hot-swap drives in arrays with hot-swap
drives. Do not use non-hot-swap drives as hot spares.
Plan Your Arrays
In this section you specify which hot-swap drives are assigned to which arrays.
For each hot-swap drive that is assigned to an array, log its array number in
Worksheet A.
When creating your arrays, please consider the following:
• Group together hot-swap drives that have the same capacity. (If you use
drives with different capacities in an array, all the drives in the array are
treated as though they have the capacity of the smallest drive.)
• Arrays are numbered sequentially beginning with Array 0.
• Arrays can have between one and eight hot-swap drives per array.
• The more drives you group together in an array, the better the
performance.
• The hot-swap drives in an array can be all on the same channel, or they
can be on separate channels.
• You might plan to reserve one or more hot-swap drives for use as a hot
spare. See "Plan Hot Spares (Optional)" later in this chapter for more
information.
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