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Section One
Supports two 2,7 run-length limited (RLL) qualified ST-4121506 drives.
Runs High Performance 7
.5
MHz RLL drives from all major RLL
manufacturers. Supports two drives that have different capacities, different
access times and different manufacturers without controller modification.
Drives with up to 16 heads and 4096 cylinders are supported by the
controller through the registers, 1024 cylinders via INT 13. Provides both
the highest capacity and highest performance.
Can support more than 1024 cylinders under DOS. A built-in partition
driver allows use of drives with more than 1024 cylinders under DOS.
Breaks the OOS INT 13 limit. See Appendix VIII for details.
Highest AT 2,7 RLL performance. The combination of non-interleaved
operation, low controller overhead, and 26 sectors per track give the ACB-
237X the highest transfer rate available today. This is from 700 Kilobytes
per second to as high as 750 Kilobytes per second data transfer depending
on system configuration, thus the highest system performance in
multitrack data transfers.
Non-interleaved operation. This gives the ability to read one track of data
in one disk revolution, the maximum rate that the drive can give data to the
controller. This provides the fastest controller/drive performance.
Most accurate 2,7 RLL data separator. The AIC-6225 Data Separator chip
used in all Adaptec 2, 7 RLL designs has the smallest data separator window
margin in the industry. For the ACB-237X, the window margin is 3.3
nanoseconds compared to 6-10 nanoseconds for the competition. This
insures the hightest data reliability for your valuable data.
Optional on-board Adaptec ACB-BIOS. This provides the most
functionality of any AT controller. The copyrighted ACB-BIOS contains
the low level format, defect management, data verification,
autoconfiguration of any drive without changing AT system BIOS, large
disk partitioning and OOS device driver. The ACB-BIOS functions are also
accessible by your customized redirected
1/0
drive configuration program.
ACB-237X
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