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maximizes the capacity and transfer rate of the drive giving 6% capacity and
speed improvement over 34 sectors per track. For example, a 170 MB
unformatted drive will provide 8.4 MB additional capacity and 60 KB/s more data
transfer speed. (The ACB-2322B-8 supports up to 52 sectors per track.)
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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. The ACB-BIOS functions are also accessible by your customized
redirected I/O drive configuration program.
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ACB-BIOS low-level primary format. This provides the ability on the controller to
format the drive without the need of system diagnostics or changing the AT system
BIOS.
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ACB-BIOS ability to read ESDI drive parameters. This reads the drive
characteristics directly from the drive, reducing the possibility of using the wrong
number of heads, cylinders, sectors, etc.
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ACB-BIOS ability to read ESDI manufacturer's defect list. This reads the
manufacturer's flagged bad areas on the disk, eliminating the need to enter them
manually.
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ACB-BIOS ability to add grown defects, save and protect all defect lists. This
gives the ability to run additional defect tests and add the defects to those the
manufacturer found. Also the controller saves and protects both the manufacturer's
and grown lists from accidental erasure, thus the highest data reliability.
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ACB-BIOS sector -level defect mapping. This flags a sector on the disk to be
unusable and reports to the operating system its location, giving system level data
integrity.
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ACB-BIOS data verification using worst case data patterns. This tests the disk with
the worst possible combinations of data before valuable user data is placed on the
disk. This provides the highest data reliability.
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ACB-BIOS autoconfiguration of any ESDI drive, not in AT system BIOS. This
allows any ESDI drive to be formatted and used without changing the AT system
BIOS drive tables. This simplifies the cumbersome task of changing EPROM drive
tables to add ESDI. The controller writes the drive parameters onto the drive
during format and reads them on power up. This is ideal for field upgrades since
the controller does not need to be hardware configured to the specific drive. This
achieves the highest drive flexibility possible.
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ACB-BIOS defaults and help messages. Default entries help speed the user
through an installation. If an error occurs, help messages come up to tell the user
what to do.
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XT height board. This allows use in both XT and AT height machines, thus giving
you flexibility in choosing your machine's enclosure.
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High component integration using Adaptec ICs. Adaptec is committed to IC
development in order to integrate and to reduce the price of both boards and ICs.
Adaptec's ICs are used in all Adaptec boards and in most integrated drives on the
market; therefore, Adaptec components are proven in reliability and in high volume
production.
(http://www.franken-online.de/ymmv)
ACB-232XB User's Manual
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