Advantech PCA-6157, Руководство пользователя

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Chapter 5 SCSI Drive Installation 95
Using the Base Timeout Option
Command line option: timeout=<option>
Default value: 15
Valid options : Any integer value 15 to 999999999
(The number 999999999 is not a hard
coded boundary in the 3.03.06 to
3.04.02 versions of the drivers. This is,
however, a strongly recommended
boundary. 999999999 seconds corres-
ponds to a timeout of greater than 31
years! This value will be hard coded as
an upper boundary in future releases of
the driver. A value in excess of
999999999 entered for the timeout
value may result in an overflow condi-
tion on the timeout parameter, and result
in a timeout value of substantially less
than 31 years, including the default
value of 15 seconds.)
Function: Specify the minimum value (in seconds)
for command timeout.
Possible Impact: Ensure system integrity when using a
slow device. Performance may be
reduced.
Applicable Versions: 3.04.00 and higher
The amount of time, in seconds, allowed for a command is
dynamically determined by the number of pending commands and
a base offset, or base timeout. If a device is slow, this value may
be increased to insure the device has adequate time to respond to a
command issued to it before the command times out.