13. Using The Cartridge Tape Drive - Northern Telecom DNC-50 Installation Manual

13. Using the Cartridge Tape Drive

Each DNC system is equipped with one or more SRUs with slots for cartridge tapes.
Cartridge tapes are used to load new software releases, perform backups of
programs and data, and restore programs and data in the event of equipment
failures.
Three types of SRU accomodate cartridge tapes:
(a) DNC systems with the Shugart Associates Systems Interface (SASI) interface
(b) The Cartridge Tape SRU, used in DNC systems with the Small Computing
(c)
1. To ensure proper operation, carefully clean the tape heads after the system
loads for the first time, and before every tape drive session.
2. If you intend to download data to a tape, ensure that it is blank or that any
data on it may be overwritten.
3. Load a tape in the cartridge slot ONLY when the administration procedures
contain explicit instructions to that effect. The cartridge slot must otherwise be
empty at all times.
4. Retension a new cartridge tape prior to first use, and prior to each use if
used infrequently.
use one 80-megabyte Mass Storage SRU. It accepts the tape cartridge in a
vertical orientation.
Systems Interface (SCSI), accepts the tape cartridge in a vertical orientation.
The 1/4-shelf Disk/Tape SRU (either 80-megabyte or 160-megabyte SRU)
used in DNC SCSI systems, accepts the tape cartridge in a horizontal
orientation. The 1/4 Shelf Disk/Tape SRUs are used only with NSR27 and
later software.
- CAUTIONS -
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Practice 450-1011-201