Spectra Logic Spectra 12000 - Manual (Page 160)

160 Spectra 12000 User Guide
The maximum length of the SCSI cable (including the internal and the
external cable) depends on the SCSI configuration:
Differential SCSI Maximum allowable bus length is 60 feet (20 meters)
including the eight inches (20 centimeters) of cabling inside the library.
LVD SCSI Maximum allowable bus length is 39 feet (12 meters), including
the eight inches (20 centimeters) of cabling inside the library.
Follow these steps to determine if your SCSI configuration complies with
the maximum cable length specifications:
1. Measure the length of the SCSI cables between each device on the
SCSI bus.
2. Add these lengths together.
3. To that sum, add eight inches (20 centimeters) for the cabling inside
each Spectra 12000 library.
4. Differential configurations must not exceed 60 feet (20 meters) in
length.
5. LVD SCSI configurations must not exceed 39 feet (12 meters) in
length.
SCSI Terminator Requirements
If the library is the last device on the SCSI bus, a terminator must be
attached to the empty SCSI connector on the back of the library.
The SCSI terminator must be the correct SCSI type, either Differential or
LVD. Two terminators are provided for each QIP.
Note: For best performance, use the terminator included
with the Spectra 12000 library.