A term used to describe a 8-bit wide bus operating Ultra (between 20 MHz and 40 MHz). The maximum data rate of a Ultra SCSI device or bus is 40 Mbytes/sec.
A standard for SCSI data transfers. It allows a transfer rate of up to 40 MBytes/sec over an 8-bit SCSI bus, and up to 80 MBytes/sec over a 16-bit SCSI bus. The STA (SCSI Trade Association) supports using the term "Ultra2 SCSI" over the older term "Fast-40."
This flavor of the SCSI interface supports data transfer rates up to 80 MB/second. Medéa VideoRaids also incorporate a Low Voltage Differential (LVD) interface - with a compatable host adapter this allows longer cabling.
Ultra2 Wide SCSI Ultra ATA
This standard doubles the maximum transmission speed of Ultra SCSI. Almost all devices made to this standard support the 80MBps transfer rate of Ultra2...
Provides bus data rates of 80 Mbytes per second and easy integration of up to 16 devices on the SCSI bus using cable lengths of 12 meters. Low Voltage Differential doubles SCSI bus rates and provides the integration flexibility and data integrity of High Voltage Differential at single-ended costs. Ultra2 SCSI LVD is fully backward compatible to all previous single-ended versions of SCSI, taking advantage of the previously installed multibillion-dollar product base. When an Ultra2 drive is installed on a previous version SCSI bus, performance will de-fault to the specifications of that bus.
Uses an 8-bit bus and supports data rates of 40 MB/sec.using Fast-40 signaling. below for more on this type of SCSI.
High performance SCSI protocol, faster than Ultra SCSI. Ultra2 SCSI has a bus speed of 40 MB/s in the Narrow SCSI configuration and 80 MB/s in the Wide SCSI (Wide Ultra2 SCSI) configuration.