IBM RT PC, Options Installation

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Section 2. Removing and Installing Drives in IBM 6150 2-7
Internal Fixed-Disk Options
Warning: Before installing additional fixed-disk drives, ensure
that the drives, cables, and fixed-disk drive adapter(s) you intend
to use are compatible. The following information is designed to
help you make that compatibility determination.
The IBM 6150 standard configuration has one fixed-disk drive
installed in drive position C. This drive is connected through a
fixed-disk and diskette drive cable bundle to one of three types of
fixed-disk and diskette drive adapters installed in adapter slot 1:
• IBM Personal Computer AT Fixed-Disk and Diskette Drive
Adapter
The IBM Personal Computer AT Fixed-Disk and Diskette Drive
Adapter is used only with the R40 fixed-disk drive; the Personal
Computer AT Fixed-Disk and Diskette Drive Adapter will not
operate with R70, E70, E114 or 310 megabyte fixed-disk drives.
Up to two R40 fixed-disk drives can be operated from a single
Personal Computer AT Fixed-Disk and Diskette Drive Adapter;
installation of a third internal R40 fixed-disk drive requires a
second Personal Computer AT Fixed-Disk and Diskette Drive
Adapter and a Fixed-disk and Diskette Drive Second Cable.
• IBM RT PC ESDI Magnetic Media Adapter
The IBM RT PC ESDI Magnetic Media Adapter is used only with
the R70 fixed-disk drive and will not operate with R40, E70,
E114 or 310 megabyte fixed-disk drives. Refer to “IBM RT PC
ESDI Magnetic Media Adapter” on page 2-54.
Up to two R70 fixed-disk drives can be operated from a single
IBM RT PC ESDI Magnetic Media Adapter; installation of a third
internal R70 fixed-disk drive requires a second IBM RT PC ESDI
Magnetic Media Adapter and a Fixed-disk and Diskette Drive
Second Cable.