NCR S26 manual Enhanced IDE Features, On Board IDE, Hard Disk Block Mode, Hard Disk Size 504 MB

Basic System Configuration

Note: The baud rate maximum value is only for the BIOS POST under UNIX environment. The system I/O chipset SMC 37C665GT supports up to 115.2 Kbps.

Enhanced IDE Features

This section describes several enhanced IDE features.

Hard Disk Block Mode

The Hard Disk Block Mode function enhances disk performance depending on the hard disk in use. If you set this parameter to Enabled, it permits data transfer in block (multiple sectors) by increasing the data transfer rate to 256 bytes per cycle.

If your system does not boot after enabling this parameter, change the setting to Disabled. This parameter is normally set to Disabled.

Hard Disk Size > 504 MB

This enhanced IDE feature works only under MS-DOS™ and Microsoft Windows™ 3.x environments. If enabled, it permits you to use a hard disk with a capacity of more than 504 MB. This is made possible through the Logical Block Address (LBA) mode translation. Other operating systems require this parameter to be set to Disabled.

To prevent data loss, keep this parameter to Enabled if you are using a hard disk with more than 504 MB capacity and was previously configured through LBA mode. When you use a hard disk configured through the cylinder-head- sector (CHS) mode, set this parameter to Disabled.

On Board IDE

This parameter permits the IDE to be disabled so that IRQ 14 can be used for PCI or EISA adapters.

NCR S26 Hot Plug Server User Guide 4-9