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SCSI Basics
Installation and Operation
155
Narrow or wide SCSI
The narrow library supports Mammoth and Eliant 820 tapes
drives. The wide library supports Mammoth tape drives only.
Fast SCSI
The library supports fast SCSI, which does not require any special
cabling or configuration. However, proper cable lengths, stub
length, and termination are more important on a fast SCSI bus
than on a regular SCSI bus.
SCSI cabling
When connecting the library and other devices on the SCSI bus,
follow these guidelines for SCSI cabling:
✔ Single-ended configurations. If you are using Mammoth tape
drives and your host is able to accommodate a data transfer
rate of more than 5.0 MB per second, make sure that the total
length of all internal and external cables does not exceed
3.0 meters (9.8 feet). If your host limits data transfers to 5.0 MB
per second or less, or if you are using the Eliant 820 tape drives,
make sure that the total length of all internal and external
cables does not exceed 6.0 meters (19.7 feet).
✔ HVD/LVD SCSI cable lengths. Make sure the total length of
all internal and external cables on the SCSI bus does not
exceed 12 meters (39 feet). If you have a point-to-point
connection, make sure the total cable length does not exceed
25 meters (82 feet).