IBM Aptiva 2156 Hardware Maintenance Service page 52

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Hard Disk Block Mode
This function enhances disk performance depending on the hard disk in use.
BIOS automatically detects if your hard disk supports this feature.
Setting this function to Auto allows data transfer in blocks (multiple sectors) to
increase the data transfer rate. If your system does not boot after setting this
parameter to Auto, change the setting to Disabled. The default setting for this
parameter is Auto.
Advanced PIO Mode
The advanced PIO mode feature improves system performance by allowing
the use of faster hard disk drives. If your hard disk supports this feature, you
may set this parameter to Auto (default), Mode 0, Mode 1, Mode 2, Mode 3, or
Mode 4 depending on the hard disk requirements. See the documentation that
came with the hard disk.
If your hard disk does not support this function, set this parameter to Disabled.
Hard Disk Size > 528MB
This enhanced IDE feature works only under DOS and Windows
environments. If set to Auto, which is the default, BIOS allows you to use a
hard disk with a capacity of more than 528MB. This is made possible through
the Logical Block Address (LBA) mode translation. You may be required to set
this parameter to Disabled if you use other operating systems.
To prevent data loss, set this parameter to Auto if you are using a hard disk
with more than 528MB capacity that was previously configured through the
LBA mode. If you use a hard disk configured through the user-specific
Cylinder-Head-Sector (CHS) mode, set this parameter to Disabled.
Halt On
The category determines whether the computer will stop if an error is detected
during power up.
No errors
Whenever the BIOS detects a non-fatal error
the system will be.
All errors
The system boot will not be stopped for any
error that may be detected.
All, But Keyboard
error; it will stop for all other errors.
All, But Diskette
The system boot will not stop for a disk error; it
will stop for all other errors.
All, But Disk/Key
The system boot will not stop for a keyboard or
disk error; it will stop for all other errors.
1-14
The system boot will not stop for a keyboard

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