LSI LSI21002 User Manual page 55

to allow other I/O processes. This option tells the host adapter whether
or not to allow a device to disconnect. Some devices run faster with
disconnects enabled (typically newer devices), while some run faster with
disconnects disabled (typically older devices).
Read/Write I/O Time-out (Seconds) – This option sets the amount of
time the host adapter waits for a read, write, or seek command to
complete before trying the I/O transfer again. Since this provides a
safeguard allowing the system to recover if an I/O operation fails, it is
recommended that you always set the time-out to a value greater than
zero.
Note: If the time-out is set to zero, then the I/O will never time-out.
Scan for Device at Boot Time – Set this option to "No" when there is
a device you do not want to be available to the system. Also, on a bus
with only a few devices attached, you can speed up boot time by
changing this setting to "No" for all unused SCSI IDs.
Scan for SCSI Logical Unit Numbers (LUNs) – Set this option to
"No" if you have problems with a device that responds to all LUNs
whether they are occupied or not. For example, if there is a SCSI device
with multiple LUNs but you do not want all of those LUNs to be available
to the system, then set this option to "No." This will limit the scan to LUN0
only.
Queue Tags – This option allows the user to enable or disable the
issuing of queue tags during I/O requests when your device driver can
do this.
Initial Boot – This option allows any device attached to the first adapter
to become the boot device. It provides the users of non-BBS personal
computers with some of the flexibility of a BBS machine.
Format – If enabled, this option allows the user to low-level format a
magnetic disk drive. Low-level formatting will completely and irreversibly
erase all data on the drive. Note that this utility will only format 512-byte
sectors. For other sector sizes, do not use this utility.
Verify – This option allows the user to read all the sectors on a disk
looking for errors. When selected, this option displays the following
message:
Starting the SCSI BIOS Configuration Utility 3-13