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43 lines
1.8 KiB
Plaintext
43 lines
1.8 KiB
Plaintext
=============================================================================
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AST RESEARCH, INC. TECHNICAL BULLETIN #0689 04-30-91
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=============================================================================
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PREMIUM II SYSTEM BIOS AUTOSENSE FEATURE
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The Premium II BIOS (version 2.0 and above, AST part numbers 237826-001A and
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237827-001A) supports a feature known as "Autosense". This feature allows
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the BIOS to automatically sense, and use, optimized parameters which take
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advantage of the full capacity of IDE type hard drives.
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Prior to this feature, the parameters for a particular drive had been
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determined by entering a discrete value (e.g. "17") in SETUP. This value had
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to operate with drives from several vendors, so these parameters were not
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always optimal for a particular drive.
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This means that the same drive configured by these two methods will have two
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different sets of parameters, particularly the number of cylinders.
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Therefore, a drive which has been partitioned and formatted under a discrete
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drive type may have to be re-partitioned and re-formatted when configured by
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the autosense feature. Make sure the following steps are taken before using
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autosense to configure a drive:
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- Save the data currently on the drive. Save only files and directories,
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not partition information.
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- Run SETUP and choose "AUTO" for drive type. A set of parameters will
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be returned for the installed drive. Save the configuration and exit
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SETUP.
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- Re-partition and re-format the drive under the new configuration, and
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restore the original data.
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Note: The Conner CP-3000 40MB drive (AST part number 230092-040) cannot be
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configured via the autosense feature. This drive must be manually
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configured as type "17" in the SETUP program.
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