Integrated HP NetRAID Controller Config. Guide

Chapter 4 Planning
35
SCSI Transfer Rate
On Worksheet A, record the SCSI transfer rate for each channel. The default
SCSI transfer rate is Ultra2 because the internal hot-swap mass storage cage
supports Ultra2 disk drive modules. However, you can change the SCSI transfer
rate to Fast or Ultra if the channel is connected to an external mass storage
enclosure. Refer to your system or external mass storage system documentation to
determine whether your disk enclosure supports Fast, Ultra, or Ultra2 SCSI
drives.
If you have connected a second internal hot-swap mass storage cage to SCSI B,
your SCSI transfer rate for this channel should also be Ultra2.
l For HP NetServer LH 3/3r and LH 4/4r, any non-hot-swap SCSI
devices have a separate SCSI connector that isolates the Ultra2 drives
from the non-hot-swap, single-ended devices.
l For HP NetServer LH 3000/3000r and LH 6000/6000r, any non-hot-
swap SCSI devices are on a separate SE SCSI channel.
l For HP NetServer LT 6000r operating in HP NetRAID mode, any
non-hot-swap SCSI devices should be connected to a SCSI controller
accessory board. Do not include them in Worksheet A.
Step B. Plan Arrays and Logical Drives
There are two ways to set up arrays and logical drives.
• Automatic configuration is explained for those users who do not want to
customize their arrays and logical drives.
• Custom configurations permit you to create exactly the configuration that
best suits your needs.
Automatic Configuration
Automatic mode defines the arrays and logical drives for you, and sets their
parameters. It makes configuration easy.
Automatic mode uses the following rules to define arrays:
• It scans the physical drives, starting at SCSI ID 0 on Channel 0, and it
groups the physical drives by capacity, with up to five drives in an array.
• Each array is defined as a single logical drive, and array spanning is not
used.
!