Dell GX1 User Manual download pdf (Page 40)

2-6 Dell OptiPlex GX1 and GX1p Mini Tower Managed PC Systems Reference and Installation Guide

“IDE2”). It is recommended that you use the secondary EIDE interface connector for

EIDE CD-ROM and EIDE tape drives.

NOTES: For all devices from Dell that use the built-in EIDE controller, set the appropri-

ate

Drive option to Auto. For small computer system interface (SCSI) devices, set the

appropriate

Drive option to None.

You must have an EIDE device connected to the primary EIDE interface if you have an

EIDE device connected to the secondary EIDE interface.

For older EIDE hard-disk drives not shipped with the system from Dell and less than

528 megabytes (MB) in capacity, you can use one of the following options if the Auto-

detect feature does not work:

 A specific drive-type number

 Usr1 or Usr2

For each drive, seven parameters can be chosen as a group by drive-type number or

entered 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 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.

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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.

For example, you may have a memory expansion card that needs to be addressed

starting at 15 MB. Selecting the 15M - 16M

option in the Reserved Memory option

specifies that the base memory from 15 to 16 MB come from the memory expansion

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Dell GX1 User Manual Page 40

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