Meridian America Link/Customer Controlled Routing Disk/tape unit, Tape usage Module Mbyte tape

80Chapter 4: Meridian Link/CCR hardware

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	Read operation only
	(backup and program load)	(program load only)
Application Module with	Not compatible	Read and write operations
155-Mbyte tape drive		(backup and program load)
(NT7D62)

553-3202-210 Standard October 1998