Dell OptiPlex GX1 - Manual (Page 70)

System Setup Options: Dell OptiPlex GX1 Small-Form-Factor System User's Guide
file:///C|/infodev/2013/eDoc/OpGX1/UG/setupopt.htm[2/21/2013 11:47:16 AM]
The System Setup program 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 in "Using the
System Setup Program" 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 system’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 current 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.
Reserved Memory
Reserved Memory allows you to designate a region of system board memory that can be supplied by an
expansion card. You should not enable the reserved memory feature unless you are using an expansion
card that requires special addressing.