Meridian Link/Customer Controlled Routing, Installation And Upgrade Manual

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80 Chapter 4: Meridian Link/CCR hardware
553-3202-210 Standard October 1998
Disk/tape unit
The disk/tape unit (shown in Figure 26) is a slide-in assembly with both a
hard disk drive and a cassette tape drive and is used for software installation
and backup. A 50-conductor ribbon cable is an integral part of the disk/tape
unit, extending the SCSI bus from the SBC card by the P2 adapter board. In
the middle of this ribbon cable is an external SCSI connector.
The following disk/tape units are available:
¥ NT7D62AA a 104-Mbyte hard disk drive and a 155-Mbyte tape drive
(found in older systems; this unit is no longer available)
¥ NT7D62AB a 172-Mbyte or a 180-Mbyte hard disk drive and a
155-Mbyte tape drive (found in older systems; this unit is no longer
available)
¥ NT7D62AC a 240-Mbyte hard disk drive and a 155-Mbyte tape drive
The following tapes are supplied with the Application Module:
¥ one that provides the operating system for the Application Module
¥ one that provides the application software
¥ at least one blank tape for backups
Note: As shown in Table 10, an Application Module with a
155-Mbyte tape drive (NT7D62) cannot use a 600-Mbyte tape.
(You cannot see through the sprocket holes of a 600-Mbyte tape.)
Table 10
Tape usage
Module 600-Mbyte tape 155-Mbyte tape
IPE Module Read and write operations
(backup and program load) Read operation only
(program load only)
Application Module with
155-Mbyte tape drive
(NT7D62) Not compatible Read and write operations
(backup and program load)