APC RAID Subsystem SCSI-SATA II User Manual download pdf (Page 75)

SCSI to SATA II RAID Subsystem

User Manual

8.2 Channel Manager

The Channel Manager can be used to configure the SCSI Host Channels A and B options

to the preferred settings. Select

“Channel Manager” function in System menu.

For each Host Channel, the SCSI ID, Wide, Speed Setting, Current Speed, and Tag

Queue can be set.

Option Description

SCSI ID

Select 0 to 15 or Multiple ID. The RAID subsystem is like a

large SCSI device. A SCSI ID should be assigned and

selected from the list of SCSI IDs. If Multiple ID is selected,

you can map ID to a host channel.

Wide

If enabled for a wide bus, the throughput is double transfer

rate, because each transfer is of 16 bits or two bytes. For

example, if Wide option is enabled, the Speed Setting can

have maximum transfer speed of 320MB/sec.

Speed Setting

Select the preferred Speed setting. The options are 80

MB/sec, 160 MB/sec, and 320 MB/sec for Wide mode. 40

MB/sec is available when Wide is disabled.

Current Speed This shows the current speed for the host channel.

Tag Queue

When this option is enabled, it enhances the overall system

performance under multi-tasking operating systems by

reordering tasks or requests in the command queue of the

RAID system. This function should normally remain enabled.

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APC RAID Subsystem SCSI-SATA II User Manual Page 75