AT&T PC 6300 - Hard Disk Controllers

APPENDIX A: SWITCHES AND JUMPERS
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HARD DISK CONTROLLERS f)
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There are two types of HDU Controllers: the DTC (Data
Technology Corporation) and the WD (Western Digital). The p,
physical differences between the Controllers are:
• The DTC Controller is a full-size modular circuit card. The WD
Controller is a half-size modular circuit card.
• Each HDU Controller must be configured for the type of drive
used (see Appendix A). The DTC Controller is configured by
setting the DIP Switches on the card. The WD Controller has
jumpers that must be placed.
Each Controller formats the hard disk drives differently; therefore^
they cannot be interchanged without performing the following:
• Make a backup copy of all data if possible
• Low-Level Format the drive using the System Test
• Partition the drive using the MS-DOS FDISK
• Restore the backup data.
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The WD Controller is not supported by ROM BIOS 1.21 and earlier
versions. Both the DTC and the WD Controller are supported by
ROM BIOS 1.43 and later versions. ||
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