AOpen DX37PU-OL-E0112B User Manual page 135

Motherboard
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4.3.7.2 Sync Transfer Rate
This option determines the maximum synchronous data transfer rate that the SCSI controller can support. The SCSI controller
supports rates up to the Fast Wide SCSI maximum of 80.0 MB per second. The default value is 80.0.
In most cases, you can use the maximum value of 80.0. However, if the SCSI controller is not set to negotiate data transfer (i.e.,
Initiate Sync Negotiation is set to No), the value selected here is the maximum rate that the SCSI controller accepts from the device
during negotiation. This is a standard SCSI protocol.
Some older SCSI-1 devices do not support Fast SCSI
data transfer rates.
operate erratically or hang if the transfer rate is too high.
4.3.7.3 Initiate Wide Negotiation
This option allows communication between all devices (lower 8-bit or upper 8-bit) on the wide (16-bit) SCSI bus. When set to Yes, each
device can connect on the bus. When set to No (disabled), communication can only occur on the lower eight bits of the 16-bit SCSI bus.
The default setting is Yes.
4.3.7.4 Enable Disconnection
This option determines whether the SCSI controller allows a SCSI device to disconnect from the SCSI bus (sometimes called
Disconnect/Reconnect). Disconnect/Reconnect allows the SCSI controller to perform other operations on the SCSI bus while the SCSI
device is temporarily disconnected.
When set to Yes, the SCSI device may disconnect from the SCSI bus. The SCSI device, however, may choose not to disconnect, even
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This may cause the system to
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