Advanced Configuration Options - TYAN THUNDER K7 User Manual

The following three options have no effect if the SCSI BIOS is disabled. (The SCSI BIOS is normally
enabled by default.)
• Enable Write Back Cache—(Default: N/C) Can be used to enable or disable the write-back cache
on SCSI disk drives connected to the host adapter. Leave this option at its default setting of N/C (no
change), which usually allows for optimum drive performance.
• BIOS Multiple LUN Support—(Default: No) Leave this setting at No if the device does not have
multiple Logical Unit Numbers (LUNs). When set to Yes, the SCSI controller BIOS provides boot
support for a SCSI device with multiple LUNs (for example, a CD "juke box" device in which multiple
CDs can be accessed simultaneously).
• Include in BIOS Scan—(Default: Yes) When set to Yes, the SCSI controller BIOS includes the
device as part of its BIOS scan at bootup.

Advanced Configuration Options

Note: Do not change the Advanced Configuration Options unless absolutely necessary.
• Reset SCSI Bus at IC Initialization—(Default: Enabled) When set to Enabled, the SCSI controller
generates a SCSI bus reset during its power-on initialization and after a hard reset.
• Display <Ctrl> <A> Messages during BIOS Initialization—(Default: Enabled) When set to
Enabled, the SCSI BIOS displays the Press <Ctrl> <A> for SCSISelect (TM) Utility! message on
your screen during system bootup. If this setting is disabled, you can still invoke the SCSISelect util-
ity by pressing <Ctrl> <A> after the SCSI BIOS banner appears. If you change this setting, the
change automatically applies to both SCSI channels.
• Extended BIOS Translation for DOS Drives > 1 GByte—(Default: Enabled) When set to
Enabled, provides an extended translation scheme for SCSI hard disks with capacities greater than
1 GByte. This setting is necessary only for MS-DOS 5.0 or above; it is not required for other operat-
ing systems.
Caution: Changing the translation scheme destroys all data on the drive. Be sure to
back up your disk drives before changing the translation scheme.
Use the MS-DOS Fdisk command to partition a disk larger than 1 GByte controlled by the SCSI
BIOS, when using DOS.
• Verbose/Silent Mode—(Default: Verbose) When set to Verbose, the SCSI BIOS displays the host
adapter model on the screen during system buildup. When set to Silent, the message will not be
displayed during bootup. If you change this setting, the change automatically applies to both SCSI
channels.
• Host Adapter BIOS (Configuration Utility Reserves BIOS Space)—(Default: Enabled) Enables
or disables the SCSI BIOS. If you change this setting, the change automatically applies to both
SCSI channels.
• Leave at Enabled to allow the SCSI BIOS to scan and initialize all SCSI devices at initial bootup.
• Set to Disabled: Not scan if the devices on the SCSI bus (e.g. CD-ROM drives) are controlled by
software drivers and do not need the BIOS, and you do not want the BIOS to scan the SCSI bus.
• Set to Disabled: Scan Bus if you don't need the BIOS, but want to scan SCSI devices on the bus.
The following four options on the next page have no effect when the SCSI BIOS is disabled. (The SCSI
BIOS is normally enabled by default.)
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