SCSI hard disk, STAT hard disk, SAS hard disk is the difference between what?

SCSI's English name is "Small Computer System Interface", the Chinese translation of the "small computer system interface"; as the name suggests, this is designed for small computers to expand the interface, which allows computers to add other peripherals to improve system performance or add new features. SCSI hard disks are fast and have a small CPU footprint, and are mostly used in high-end servers above the enterprise level. \x0d\ SAS is a new generation of SCSI technology, and now popular Serial ATA (SATA) hard disk, are the same, are using serial technology to obtain higher transmission speeds, and through the shortening of connecting wires to improve the internal space, etc. SAS is a parallel SCSI interface after the development of a new interface. SAS is a new interface developed after the parallel SCSI interface, and is designed to improve the performance, usability and expandability of storage systems by providing compatibility with Serial ATA (abbreviated as SATA) hard disks. \x0d\ SATA is Serial ATA, a new generation of ATA that has a different origin from SAS! Although the connecting cables are the same. \x0d\ SAS's interface technology is backward compatible with SATA. the backplane of a SAS system can be connected to either a SAS drive with dual ports and high performance, or a high-capacity, low-cost SATA drive. Because the ports of SAS drives and SATA drives look similar in shape, SAS drives and SATA drives can coexist in a single storage system. However, it is important to note that SATA systems are not SAS compatible, so SAS drives cannot be attached to SATA backplanes. Due to the compatibility of the SAS system, IT personnel are able to utilize hard drives with different interfaces to meet the capacity or performance needs of various applications, thus providing more flexibility in expanding the storage system and maximizing the investment in storage equipment. \x0d\ SAS technology also has the advantage of simplifying the internal connection design, storage equipment manufacturers are currently investing considerable costs to support different storage devices, including Fibre Channel arrays, SATA arrays, etc., and SAS connectivity will be able to reduce the cost of the design through the use of **** components. \x0d\ SAS (Serial SCSI) is a point-to-point architecture that establishes a direct connection from the disk to the controller. \x0d\ Serial SCSI (SAS) drives use the same interface as S-ATA, but use more signals, so SAS drives cannot be linked to S-ATA drive controllers. sas is a generic interface that supports both SAS and S-ATA, and SAS controllers can support both SAS and SATA disks. s-ATA uses a subset of the signals from the SAS controller, so the SAS controllers support S-ATA disks. \x0d\ Initially, SAS hard disks used 2.5-inch packages, which allowed rack servers to support more hard disks, and now there are vendors who have introduced standard 3.5-inch SAS hard disks; the speed of the initial products was 10,000 RPM, and now 15,000 RPM products have also been introduced.SAS hard disks have the same or better performance than SCSI hard disks with the same speed. . The serial interface reduces the size of the cables and allows for faster transfer speeds, and SAS hard disks can transfer data up to 3.0Gbit/sec.\x0d\ Applications, SCSI is superior to SAS, SAS is superior to SATA, and SATA is superior to ATA. SCSI hard disks are mostly used in servers at the enterprise level and above, SAS is currently used in workgroup level servers, and SATA and ATA are SAS is currently used in workgroup level servers, while SATA and ATA are mostly used in PCs and other low load end devices. Cable, SAS and SATA with the same cable, SCSI and ATA cables look similar, but contains a different number of cables, completely non-interchangeable! ATA cable a maximum of two hard disk, and a SCSI cable can be hooked up to reach more than 15 SCSI devices.