SMC Networks 1232 Series user manual Lba

ATAPI unit type
Option	Description	Note
None (*)	No unit selected	Default setting for both
		ATAPI Units (Master1 &
		Slave1)
Auto	Unit auto-detection	(*) = Default setting
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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