344 MB SCSI Hard Drive  (250-4163)    Features         Faxback Doc. # 5126

The 344MEG hard drive with embedded SCSI controller is a 5" Winchester disk
drive that provides 344 megabytes of formatted capacity. In addition to 344MEG
capacity, the drive provides high performance and reliability-with Mean Time
Between Failure of 40,000 hours. The embedded SCSI controller in the drive
conforms with the ANSI Small Computer System Interface Standard and Common
Command Set.

Manufacturer: CDC 94171

CPUs
Tandy 3000/4000/5000

MINIMUM SYSTEM
The 344 MEG hard drive requires a full-height 5" expansion slot for
installation.

3000/4000:  SCSI Host Adapter (25-4161) - with addition of 64 Head
            SCSI BIOS (AXX-7005)

5000:       Microchannel SCSI Host Adapter (25-6060)

SUPPORT
Radio Shack

PRODUCT ADVANTAGES

* Low audible noise.
* Low power consumption.
* Vertical or horizontal mounting.
* 40,000 hour MTBF.
* No adjustments or preventive maintenance.

PRODUCT FEATURES

* 16.5 - millisecond average seek
* Embedded SCSI controller
* Asychronous/synchronous SCSI data bus
* 48-bit error correction code
* Automatic reallocation of media defects
* Sealed, ultra-clean, head/disk/actuator chamber
* Balanced rotary voice coil actuator
* Closed-loop, dedicated servo system
* Dedicated head-landing zone
* HDA humidity control
* Automatic actuator restraint/shipping lock
* Shock mounted HDA

The SCSI hard disk drive is an internal fixed disk storage device for the
Tandy 3000/4000 computers. The hard disk drive significantly increases the
storage capacity of your computer. All the computers in the Tandy 3000/4000
series can support one or two hard disk drives.

Note that to support a SCSI hard disk, your system must include a SCSI bus
host adapter board. This board is available as an option (25-4161) for the
Tandy 3000, 3000 HL, and Tandy 4000 computers. You should install this hard
disk drive and any other internal disk drive you are adding to your computer
before you install the host adapter board.

Refer to your operating system and application manuals for specific
instructions on storing and accessing your programs on hard disk.

(abo-07/29/93)