EasyRAID Q24P2-U4R4 Hardware manual - page 12
Manual is about: SCSI Channel to Serial ATA II
Disk Array System
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easyRAID Q24P2-U4R4 Serial ATA II Disk Array System
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Host Interface
The disk array system has dual SCSI interfaces. Refer to the following sections to understand
host interface system requirements.
Small Computer Systems Interface
The easyRAID Q24P2-U4R4 has dual U320 SCSI interfaces that are compatible with previous
SCSI standards. Refer to the following table to understand SCSI bus requirements.
Note
Subtract the internal cable length (30 cm) from the maximum SCSI bus
length to calculate the maximum external SCSI cable length.
SCSI
Standard
Maximum
SCSI Bus Length
in Meters
Data Rate
in Megabytes
per Second
Maximum
Number of Devices
Ultra320
12
320
15
Ultra160
12
160
15
Ultra2
12
80
15
Ultra Wide
1.5
40
7
Fast Wide
3
20
15
Ultra
1.5
20
7