Adaptec AHA-2742T User Manual - Page 61

SCSI Bus Parity Check, SCSI Selection Timeout

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AHA-2740 Series User's Manual SCSI Bus Parity Check Select SCSI Bus Parity Check to enable or disable SCSI bus parity checking on the host adapter. Figure 3-7 displays your choices. The default setting is enabled. The host adapter always generates parity when writing to the SCSI bus. If any attached SCSI devices do not support SCSI parity checking, then SCSI Bus Parity Check should be disabled. Most devices today, however, do support SCSI parity checking. SCSI Channel A Configuration SCSI Bus Parity Check ( ) Enabled ( ) Disabled Done=F10 Figure 3-7. Selecting SCSI Bus Parity SCSI Selection Timeout Select SCSI Selection Timeout to configure the time, in milliseconds, used by the host adapter during the SCSI selection phase. Figure 3-8 displays your choices. The default setting is 256 milliseconds. Lowering the SCSI Selection Timeout will speed up SCSI bus scans considerably; however, before lowering this value, make sure that all the devices on the SCSI bus can respond to the shorter selection time. 3-10 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. C (Page 3-10) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93

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SCSI Bus Parity Check
Select
SCSI Bus Parity Check
to enable or disable SCSI bus
parity checking on the host adapter. Figure 3-7 displays your
choices. The default setting is
enabled
.
The host adapter always generates parity when writing to the
SCSI bus. If any attached SCSI devices do not support SCSI
parity checking, then SCSI Bus Parity Check should be disabled.
Most devices today, however, do support SCSI parity checking.
SCSI Selection Timeout
Select
SCSI Selection Timeout
to configure the time, in millisec-
onds, used by the host adapter during the SCSI selection phase. Fig-
ure 3-8 displays your choices. The default setting is
256 milliseconds
.
Lowering the SCSI Selection Timeout will speed up SCSI bus
scans considerably; however, before lowering this value, make
sure that all the devices on the SCSI bus can respond to the
shorter selection time.
SCSI Channel A Configuration
SCSI Bus Parity Check
(
) Enabled
(
) Disabled
Done=F10
<Edit Resources=F6>
<Cancel=ESC>
Figure 3-7.
Selecting SCSI Bus Parity
Adaptec AHA-2740 Series User’s Manual
Stock Number:
510381-00
/
Rev. C
(Page 3-10)
Print Spec Number:
491709-00 Rev C
Current Date:
9/1/93
ECN Date:
9/14/93
AHA-2740 Series User’s Manual
3-10