Setting Enable Disconnect; Send Start Unit Command - Adaptec AHA-1540C User Manual

Setting Enable Disconnect
In
the DOS environment you can increase performance slightly if
you set Enable Disconnection to No when there is only a host
adapter and a single disk device on the SCSI bus. You should set
this option to Yes, however, if you have more devices on the SCSI
bus.
Send Start Unit Command
o
This option, which is supported by some SCSI peripherals,
reduces the load on your computer's power supply by allowing the
host adapter to power up disk devices and other peripherals one-
at-a-time when you boot your system. Otherwise, the peripherals
will all power up at the same time.
Send Start Unit Command is disabled by default. Check your
hardware documentation before you enable this option to make
sure your peripherals support it. Then change the switch or
jumper settings on the peripherals to enable the options. Finally,
run the Configuration Software and enable the option for the
device(s) on the SCSI Device Configuration screen.
Try enabling Send Start Unit Command for one peripheral at a
time, rebooting each time
to
make sure each SCSI device works
properly. (Some older disk devices do not support this option and
may malfunction if they receive the command.) Note that Send
Start Unit Command has no effect if the host adapter BIOS is
disabled.