RadiSys EPC-5A, Hardware & Software Reference Manual

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EPC-5A Hardware & Software Reference Manual
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Type
If you are using a pre-configured system, you probably have an IDE hard disk drive.
Select “None” if you are not using an IDE hard disk drive. In the case for which you
have an IDE disk but cannot employ the “Autotype” feature, then select “User” for the
Type and enter the correct drive values for cylinders, heads, sectors/track, and write
precompensation from the label attached at the factory. For disks not supplied by
RadiSys, consult the disk drive’s documentation.
If you specify “Auto” for the hard disk type, the BIOS will query the hard disk for its
parameters whenever the POST runs. If a hard disk type is set to “Auto”, but no hard
disk is actually present, the BIOS will continue to query the (non-existent) hard disk
until it times out, adding a number of seconds to the duration of the POST.
Note that there are some restrictions when setting up devices on the EPC-5A. If you
plan to boot from a non-IDE device, such as a SCSI hard disk, set the C: drive type as
“None” and use the BIOS extension.
LBA Mode Control
When enabled, this option allows the System BIOS to reference hard disk data as
logical blocks instead of using the traditional Cyliners/Heads/Sectors (CHS) method.
This option can only be used if both the hard disk being configured and the operating
system support Logical Block Addressing (LBA). If disabled, then CHS mode is used.
Note that autotyping may change this value if the hard disk reports that it supports
LBA. The default is “Disabled.”