Provides 20 MB/s transfers over an 8-bit bus or 40 MB/s transfers over a 16-bit Wide SCSI bus. Also known as Fast-20 SCSI, this feature is most commonly found in SCSI-3 drives.
A high-speed host data transfer feature that transfers data at 33.3 MB per second.
An error that cannot be overcome using Error Detection and Correction.
The total number of usable bytes on a disk, including the space that is required to record location, boundary definitions, and servo data. (See also formatted capacity.)
Universal Serial Bus (USB)
A serial bus with a bandwidth of 1.5 megabits per second (Mbps) for connecting peripherals to a microcomputer. USB can connect up to 127 peripherals, such as external CD-ROM drives, printers, modems, mice, and keyboards, to the system through a single, general-purpose port. This is accomplished by daisy chaining peripherals together. USB supports hot plugging and multiple data streams.
A read error that cannot be overcome by an ECC scheme or by rereading the data when host retries are enabled.
The ability of the drive to receive a maximum of one I/O process from each initiator.
In hard drives, the replacement of a hard drive with one offering greatercapacity or performance, or both.