Smc-networks SpacePC 1232 Series Bedienungsanleitung PDF herunterladen (Seite 52)

ATAPI unit type

Option Description Note

None (*)

No unit selected Default setting for both

ATAPI Units (Master1 &

Slave1)

(*) = Default setting

Auto

Unit auto-detection

LBA

LBA unit selected

CHS

CHS unit selected

CD-ROM

CD-ROM unit selected

Other

Other unit selected

• Note: when the Auto feature is selected, the BIOS ignores any other data (like Mode, Cyls,

Head, etc.). Use this option for the most of hard disks or other ATAPI devices.

• Note: LBA and CHS are two different types of ATAPI units addressing mode. The first one is

normally used with modern hard disk, from 512 Kbytes to above 8 Gbytes. For both modes

you have to know the

physical hard-disk structure in terms of Cylinders, Heads and Sectors.

So, for an easy use of any kind of disk, the

Auto option is preferable.

•

Note: to speed-up the bootstrap select the option None for unused ATAPI devices.

PIO Mode

PIO is a special data-transfer system between two or more EIDE devices, where all the data pass

through the processor. There are five transfer rates, called

PIO mode n (with n=0..4). If the Auto

(autodetect) option is disabled, the PIO mode must be specified.

Option Description Note

PIO-0

Transfer Rate of 3.3 MBps

PIO-1

Transfer Rate of 5.2 MBps

PIO-2

Transfer Rate of 8.3 MBps

PIO-3

Transfer Rate of 11.1 MBps

PIO-4 (*)

Transfer Rate of 16.6 MBps Default setting for both

ATAPI Units (Master1 &

Slave1)

(*) = Default setting

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