Adaptec AHA-2940UW User Guide - Page 33

Using SCSISelect - 10.0 MB/sec for Narrow SCSI If the single-chip host adapter is configured so it will not initiate synchronous data transfers (Initiate Sync Negotiation is set to No), the maximum synchronous transfer rate is the maximum rate the single-chip host adapter accepts from the device during negotiation. s Enable Disconnection- This option determines whether the single-chip host adapter will allow the SCSI device to disconnect from the SCSI bus. When Enable Disconnection is set to Yes, the single-chip host adapter can perform other operations on the SCSI bus while the SCSI device is temporarily disconnected. The default setting is Yes. s Initiate Wide Negotiation- This option determines whether the single-chip host adapter attempts 16-bit data transfers (Wide Negotiation) instead of 8-bit data transfers. The default setting is Yes. (The Initiate Wide Negotiation option is only displayed if the single-chip host adapter is connected to a Wide SCSI bus.) When Initiate Wide Negotiation is set to Yes, the single-chip host adapter attempts 16-bit data transfers with the device. When the option is set to No, the single-chip host adapter performs 8-bit data transfers unless the SCSI device itself requests Wide Negotiation. Note: If you use 8-bit SCSI devices that have trouble handling Wide Negotiation while Initiate Wide Negotiation is set to Yes, the computer may operate erratically or hang. If you use these devices, set Initiate Wide Negotiation to No. Advanced Configuration s Reset SCSI Bus at Host Adapter Initialization- This option allows you to enable or disable SCSI bus resets generated by the single-chip host adapter during power-on initialization and after a hard reset. The default setting is Yes. In most cases, Reset SCSI Bus at Host Adapter Initialization should be set to Yes. 3-9 Downloaded from www.Manualslib.com manuals search engine