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The ACB-4000A is a SCSI Winchester disk Controller that controls two ST506/412 fixed and removable drives. Hardware and software compatible with previous ACB-4000 and ACB-4010.
Small Image of ACB-4000A
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No drivers are currently available for this product from Adaptec.
There are a few possible reasons for this:

- The product is supported by embedded drivers that are available in the supported operating systems.

- The product is supported by drivers that are embedded in the product.

- The product was recently introduced and there are no new drivers available.

obsolete product info (html 69 kb)
Product Documentation
User Guide for the ACB 4000A (PDF 1 MB)

The ACB-4000A Features

SCSI standard command set, plus SCSI extended optional and vendor unique commands
1-to-1 interleaving of the disk
Sector level defect skipping
Autoconfiguration of the drive
Controls both 5 1/4" and 3 1/2" ST506/412 type Winchester disk drives
32-bit ECC on both ID and data fields
Variable sector sizes of 256 bytes, 512 bytes, and 1K bytes
Support of a high-speed data search
Support of wedge servo drives such as Microscience, Syquest, Tulin and Quantum
13-microsecond high performance seek step rate
Suppports 16 heads and 2048 cylinders
Power-on diagnostics and jumper enabled self-diagnostics for controller self-checking
The ACB-4000A supports hard sectored drives
The ACB-4000A supports removable media drives

Hardware System Requirements

ACB-4000A Controller Board
Host CPU
SCSI Host Adapter (or equivalent SCSI port)
20-pin, 34-pin (drive), and 50-pin (SCSI) cables
Power supply, +5 VDC and +12 VDC

Software System Requirements

Host Operating System
I/O driver for Host Adapter
Uses written format utility
(Optional) Landing zone utility
(Optional) Any user-defined controller utilities

Board Dimensions

7.75" x 5.75" x .075"
19.7 cm x 14.6 cm x 1.9 cm

Power Consumption

+5 VDC +/- 5%, 1.5 Amps (max)
+12 VDC +/- 10% at 300 Amps(max)

Operating Characteristics

0°C to 55°C (32°F to 131"F)
10% to 95% non-condensing relative humidity
Altitude feet: Sea level to 10,000

Storage Characteristics

-40°C to 75°C (-40°F to 167°F)
Altitude feet: Sea Level to 20,000

MTBF (mean time between failures, Bellcore)

20,000 POH at 55° C