HP LH4r Integrated HP NetRaid Controller Configuration Guide - Page 9

The integrated HP NetRAID controller supports

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Chapter 1 Introduction SCSI Firmware The integrated HP NetRAID controller firmware handles all RAID and SCSI command processing and also supports the following functions: • Disconnect/Reconnect feature optimizes SCSI Bus seek. • Tagged Command Queuing allows multiple commands to be sent to the controller, thus improving random access. • Scatter/Gather supports multiple address/count pairs. • Multi-threading supports up to 255 simultaneous commands with elevator sorting and concatenation of requests per SCSI channel. • Stripe size for each logical drive can be set from 4 KB to 128 KB. • Multiple rebuilds and consistency checks have user-definable priority. Array Spanning The integrated HP NetRAID controller allows up to four arrays to be spanned together as one logical drive. For example, the integrated HP NetRAID controller can support a RAID 10 logical drive with up to eight physical disks. Using both channels, you can group up to 12 to 16 physical disks in a RAID 30 or RAID 50 logical drive depending on whether you use the internal hot-swap mass storage cages or an external mass storage system. I2O Support The integrated HP NetRAID controller supports I2O (Intelligent Input/Output) with some operating systems. For a complete list of operating systems for which HP NetRAID I2O drivers are available, see the HP web site at http://www.hp.com/go/netserver. Physical Disk Roaming The integrated HP NetRAID controller allows physical disk roaming, in which the controller keeps track of disk modules if they are moved to different slots in the hot-swap cages. Multiple Adapters The integrated HP NetRAID controller can be used with up to two HP NetRAID-3Si adapters. The integrated HP NetRAID controller allows disk 3

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Chapter 1
Introduction
3
SCSI Firmware
The integrated HP NetRAID controller firmware handles all RAID and SCSI
command processing and also supports the following functions:
•
Disconnect/Reconnect feature optimizes SCSI Bus seek.
•
Tagged Command Queuing allows multiple commands to be sent to the
controller, thus improving random access.
•
Scatter/Gather supports
multiple address/count pairs.
•
Multi-threading supports up to 255 simultaneous commands with elevator
sorting and concatenation of requests per SCSI channel.
•
Stripe size for each logical drive can be set from 4 KB to 128 KB.
•
Multiple rebuilds and consistency checks have user-definable priority.
Array Spanning
The integrated HP NetRAID controller allows up to four arrays to be spanned
together as one logical drive. For example, the integrated HP NetRAID controller
can support a RAID 10 logical drive with up to eight physical disks. Using both
channels, you can group up to 12 to 16 physical disks in a RAID 30 or RAID 50
logical drive depending on whether you use the internal hot-swap mass storage
cages or an external mass storage system.
I
2
O Support
The integrated HP NetRAID controller supports I
2
O (Intelligent Input/Output)
with some operating systems. For a complete list of operating systems for which
HP NetRAID I
2
O drivers are available, see the HP web site at
.
Physical Disk Roaming
The integrated HP NetRAID controller allows physical disk roaming, in which
the controller keeps track of disk modules if they are moved to different slots in
the hot-swap cages.
Multiple Adapters
The integrated HP NetRAID controller can be used with up to two HP
NetRAID-3Si adapters. The integrated HP NetRAID controller allows disk