According to the server hard disk interface classification can be divided into the following
1, SAS, the plate is divided into two kinds of agreement, i.e. SAS1.0 and SAS 2.0 interface, SAS1.0 interface transmission bandwidth of 3.0 GB/s speed is 7.2 kr 10 kr 15 kr, this offer has been replaced by SAS2.0 interface plate, the plate size is 2.5 inch and 3.5 inch, SAS2.0 interface transmission bandwidth of 6.0 GB/s speed with 10 kr 15 kr, common capacity of 73.6 G 146 G to 300 G 600 G to 900 G, common speed: 15000 r/min,
2, traditional SCSi server old transport interface, speed of 10 kr 15 kr, but due to the cable and its array card and the limitation of the transport protocol, the disc has a fixed method, such as along the terminal interface to start the first piece of hard disk, no memory stick to hard disk finalizers, etc, this offer has completely stopped selling now, this offer is only 3.5 inch version, common speed: 10000 r/min,
3, NL SAS the blanks professional translation for nearly line SAS, because of the high price of SAS disk, size is limited, LSI and other manufacturers is adopted by the second highest level detection of SATA discs to be modified, using SAS transport protocol, SATA disk body SAS transport protocol, forming a high capacity hard disk at low price on the market, the market is now a single plate maximum capacity for 3 TB, divided into two 2.5 inch and 3.5 inch size,
4, FDE/SDE the plate body for IBM research and development of SAS hardware encryption disk, the disk body with SAS hard disk performance, but because of itself have a hardware encryption system, can guarantee the data don't leak classified units, the plate is mainly used for high-end store a 2.5 -inch and 2.5 -inch disk interface on the machine, SED dish, the same manufacturer,
5, SSD, this dish for solid-state drives, unlike personal PC is a type of the solid-state drives the plate adopts the detection system, and USES the transmission SAS2.0 protocols, the performance of the plate also nearly is several times higher than retail SSD hard drive, server industry main supply products are under 300 g single plate,
6, FC drives, FC disk is mainly used for optical fiber as the main external SAN on transport protocol, due to the dual channel plate body, and FC transmission, the transmission bandwidth of 2 g 4 g 8 g three transmission speed, in SAN above, the more number of FC disk IOPS (write and read number of simultaneous connections) with the more high,
7, SATA hard disk: use SATA interface drives is also called a serial port, is one of the main development direction in future PC, because it has strong ability of error correction, error can automatically correct when found, thus greatly improve the data transmission security, new SATA using differential signal system "differential signal - amplified - system", this system can effectively filter out the noise from the normal signal, good ability of noise filter makes the SATA as long as the use of low voltage operation, compared with the Parallel ATA transmission voltage up to 5 V, SATA as long as 0.5 V peak to peak voltage (500 mv) can operate on higher speeds, "is the correct statement is: the peak to peak 'differential mode voltage", common speed: 7200 r/min,
With interface classification word is above 6,
According to the hard drive bracket classification is divided into hot plug and easy to plug,
Hot-swappable hard disk hard disk is usually used in SAS interface, due to the redundancy RAID, pull out a broken hard drive alone at runtime for replacement will not affect the stability of whole system running, but the entire array CARDS and function, must be hard disk back support, usually this kind of shelves for external wrench,
Easy to plug hard disk, hard disk is usually common plate body can not support the disk array system work when hot plug, usually this kind of hard disk rack as blue,
