ULTRASTOR ULTRA 12F24, Руководство по установке

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general, if you are installing in a standard AT class machine operating under MS-DOS
with one ULTRA 12F24 controller that has two ESDI drives and up to three floppy
drives, the information contained in this document will be sufficient for a successful
installation.
UltraStor’s family of disk controllers are designed to break the present system
bottleneck. . .its I/O throughput. The ULTRA family of disk controllers provides the
ultimate in speed and features ideally suited to meet the needs of the high capacity,
high performance market. These many advanced features are designed to support a
broad range of applications, cost effectively and with ease of use.
The ULTRA 12F24 is a member of this performance oriented, highly featured
ULTRA family of caching disk controllers. With 32KB of track caching, it is
completely AT register and BIOS compatible. It supports two high transfer rate ESDI
drives, both of which can have different transfer rates of up to 24Mbits per second
and supports 1:1 interleaving on the fastest of AT buses available (16MHz). It
supports the largest selection of hard drives in the market today. The ULTRA 12F24
also supports any mix (5.25" and 3.5") of up to three floppy disk drives or floppy-
tapes. (See Appendix B, Installing the 3rd Floppy Drive.) In addition to the special
support to break the 1024 cylinder and the 528MB partition limits of DOS and OS/2,
the ULTRA family of caching controllers will also co-reside with any other controller
under DOS as well as another ULTRA controller to support dual channels and/or
duplexing/mirroring in popular network operating systems.
2.0 Features
AT Register And BIOS Compatible
ULTRA Performance Provided By:
* 24Mbits per second ESDI support.
* On-board look ahead 32KBytes caching.
* 1:1 interleave capability even with 24Mbits per second ESDI drive.
* Automatic optimization head skew.
* Screen Edit programmable interleave factor.
* Automatic optimization cylinder skew.
* 16MHz I/O bus speed support.
* 24MHz internal processor speed to minimize firmware overhead.
* Optional spare sectoring allows defect-free continuous reading and writing.
Supports >1024 Cylinder Drives
Supports >528MByte Drives as a Single Volume
17, 32, and 63 Sector Mapping
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