Dell OptiPlex GX1 Documentation Update page 8

1-6 Dell OptiPlex GX1 and NX1 Documentation Update
System Setup reports hard-disk drives in one of two ways:
Newer hard-disk drives and all hard-disk drives over 8 gigabytes (GB) are reported
as an EIDE Drive, without details on type, cylinders, heads, cylinder numbers,
and sectors. See Figure 1-1 for an example.
Older hard-disk drives are reported with full details about type, cylinders, heads,
cylinder numbers, sectors, and size.
NOTE: For all Dell-installed hard-disk drives, set the appropriate Drive option to Auto.
Use one of the following options if you have an older EIDE hard-disk drive not shipped
with the system from Dell and with less than 528 megabytes (MB) in capacity:
A specific drive-type number
Usr1 or Usr2
For each drive, you can choose the seven parameters as a group by drive-type number
or you can enter the parameters individually from the keyboard. A drive-type number
specifies the parameters of a hard-disk drive, based on a table recorded in the sys-
tem's basic input/output system (BIOS).
NOTE: Operating systems that bypass the system BIOS may not obtain optimum
hard-disk drive performance.
If you choose the Usr1 or Usr2 option, you must supply the following parameters for
the drive:
Type is the drive-type number for the selected hard-disk drive (in this case, Usr1
or Usr2).
Cyls is the number of logical cylinders.
Hds indicates the number of logical heads in the drive.
Pre ( precompensation cylinder ) is the cylinder number at which the electrical cur-
rent for the drive head changes to compensate for differences in data density
across the disk surface (this parameter has no effect for EIDE drives).
Lz is the cylinder number that is used as the drive's landing zone for the
heads when the drive is not in use.
Sec is the number of logical sectors per track.
Size (automatically calculated by the system) indicates the number of millions of
bytes of storage provided by the drive.
Chassis Intrusion displays the status of the system chassis intrusion monitor and can
be set to Enabled, Enabled-Silent, or Disabled. The default is Enabled.