Hard Drive - Ultra320 SCSI

Ultra320 SCSI types

The ultra320 SCSI hard drive generation is the immediate upgrade of its predecessor, the ultra160 SCSI. The newer generation ultra320 SCSI HDD comes about as an implementation of the SCSI-3 Parallel Interface-4 (SPI-4) standards.

Over its lifetime, the SCSI standard is widely used in servers and high-end workstations. It is possible to install SCSI HDDs in a desktop PC that has one or more IDE disk drives. The IDE drive acts as the boot drive, while the SCSI hard drive provides additional storage capacity. SCSI is not commonly used in desktop PCs, although it allows the addition of a scanner and several other drives such as DVD-RAM, CD-Rs, and Zip drives to a single SCSI cable chain. USB and FireWire have gradually replaced the SCSI as alternate interfaces in the latest desktop PCs.

In-network servers, SCSI allows for the setting up of several hard drives in the RAID configuration to reduce the risk of loss of data. The configuration supports hot-swapping - the changing of hard drives while the system is still operating.

Ultra320 SCSI HDD just as the name suggests delivers 320 Mbps top speed and provides a faster bus at 80 MHz and a wider data path at 16 bit. Connections with the Ultra320 SCSI HDDs just like with SCSI devices can be daisy-chained since they have two ports - the incoming and the outgoing cables. Besides, SCSI has a strong commitment to backward compatibility with previous generations, which explains its widespread use as an I/O interface and the elimination of the need for substantial investments in equipment and infrastructure. Migration to the ultra320 SCSI HDD is smooth whether it is from the Ultra160 SCSI or other generations of the SCSI standard because of backward compatibility.

The ultra320 SCSI hard drive takes on technologies such as domain validation, cyclic redundancy check, and dual-edge clocking first introduced by ultra160 SCSI. Additionally, the ultra320 SCSI hard drive introduces protocol changes and other technologies that enhance performance and support reliable data transfer speeds at 320 Mbps. We have the following ultra320 SCSI HDD options: 146GB-10K RPM, 146GB-15K RPM, 300GB-10K RPM, 300GB-15K RPM, 36GB-10K RPM, 36GB-15K RPM, 73GB-10K RPM, 73GB-15K RPM, and 18GB-15K RPM to meet your performance and storage requirements.

The standard features of the ultra320 SCSI hard drive include:

  • Two-fold increase in transfer speed: The ultra320 SCSI hard drive increases the transfer rate by 100% from the previous generation at the rate of 320 Mbps. The technology allows greater transfer rates, effectively leading to greater performance in environments of extended data transfer and support for many devices on a single bus.
  • Support for SCSI packet protocol: By enabling packet protocols, the ultra320 SCSI HDD helps to reduce command overhead by using dual transition (DT) data phases to transfer data, commands, and statuses rather than asynchronous phases that are generally slow. Packet protocol allows for the transfer of multiple commands in one connection as well as increased performance through minimal command overhead and maximum bus utilization.
  • Quick Arbitration and Selection (QAS): the technology helps reduce control release overhead between devices at the SCSI bus. QAS is all about reducing command overhead and maximizing utilization of the bus.
  • Read/Write Data Streaming facilitates the reduction of overhead associated with data transfer through the sending of a LUN Q-TAG (LQ) data stream packet, which is subsequently followed by multiple data packets. Greater write data streaming is achieved since the bus turnaround delay is eliminated between LQ and data packets.
  • The flow control feature facilitates the initiator to enhance the pre-fetching of data for writes and enhance the flushing of FIFOs for reads.
Dell 0CC317 300GB Hard Disk Drive

0CC317 300GB (Gigabyte) 10000 Revolutions Per Minute (RPM) 8MB (Megabyte) Buffer 80Pin Ultra-320 Small Computer System Interface (SCSI) 3.5inch Low Profile...read more

Hitachi 17R6389 147GB 10K RPM SCSI HDD
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17R6389 Hitachi HUS103014FL3600 147GB 10K SCSI 3.5 Inch. Refurbished

Hitachi 17R6394 73GB Hard Disk Drive

17R6394 73 Gigabyte(GB) 10000 RPM Ultra-320 Small Computer System Interface (SCSI) 80-Pin 8 Megabytes(MB) Cache 3.5-Inch Large Form Factor (LFF) Internal...read more

HP 279785-001 36GB 10K RPM Hard Drive

279785-001 36 Gigabit(GB) 10000 Revolutions Per Minute (RPM) Ultra-320 SCSI 68-Pin LVD 3.5-Inch Large Form Factor (LFF) Internal Hard Disk Drive | Made by HP...read more

HP 289241-001 36.4GB Hard Disk Drive

289241-001 36.4 Gigabyte(GB) 15000 Revolutions Per Minute (RPM) Small Computer System Interface (SCSI) 3.5Inch Form Factor Hot Pluggable with Hard Disk Drive...read more

HP 350964-B22 300GB Hard Disk Drive

350964-B22 300 Gigabytes(GB) 10000 RPM 80pin Ultra-320 Small Computer System Interface(SCSI) 3.5inch Hard Disk Drive with Tray for Server | Made by HP |...read more

HP 360205-023 300GB Hard Disk

360205-023 300 Gigabyte (GB) 10000 RPM 80Pin Ultra320 Small Computer System Interface (SCSI) Hot Swap 3.5 inch Low Profile Hard Disk Drive for Servers | Made...read more

HP 364326-001 300GB Hard Disk Drive

364326-001 300 Gigabyte (GB) 15000 RPM 80Pin Ultra320 Small Computer System Interface (SCSI) Buffer 3.5 inch Low Profile Hard Disk Drive | Made by HP |...read more

HP 365695-001 72.8GB Hard Disk Drive

365695-001 72.8GB (Gigabyte) 10000 Revolutions Per Minute (RPM) Ultra-320 Small Computer System Interface (SCSI) 80-Pin Large Visual Display (LVD) Hot Swap...read more


404670-003 72.8 Gigabyte(GB) 10000 Revolutions Per Minute(RPM) Ultra-320 Small Computer System Interface (SCSI) 80-Pin LVD Hot Swap 3.5-Inch Large Form...read more