Acer AcceleRAID 170 User Manual

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Limitations on Mixing SCSI Drives
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AcceleRAID 170 Installation Guide
Limitations on Mixing SCSI Drives
Narrow with Wide SCSI Drives
If you mix narrow and wide SCSI devices on the controller, use a terminator 
that does not terminate the upper eight bits, and be sure to properly terminate 
the end of the bus with either a 16-bit terminator or a 16-bit device that has 
termination enabled.
LVD with Single-ended Drives
If LVD capable drives are installed on a channel with single-ended devices, 
all drives on the channel will operate as if they were single-ended devices. 
This will also limit the bus length to the single-ended bus length specified in 
Table 2-3.