SCSI hard disk is a hard disk using SCSI as an interface. With the SATA hard disk differences are as follows:
A, the main body of different
1, SCSI hard disk: the use of SCSI interface hard disk, defines how to transfer 20M data per second on the 8-bit SCSI bus and in the 16-bit Wide SCSI bus to transfer 40M data per second.
2. SATA hard disk: Serial hard disk, is by Intel, IBM, Maxtor and Seagate and other companies *** with the proposed new specification of the hard disk interface.
Two, different characteristics
1, SCSI hard disk: must be used through the SCSI interface, some server motherboards integrated SCSI interface, some according to a dedicated SCSI interface card, a SCSI interface card can be connected to seven SCSI devices.
2, SATA hard disk: storage node by the memory control interface MCI and SATA hard disk controller composed of MCI is responsible for generating, encapsulating or decapsulating the message packet in accordance with the message frame format, according to the received message packet, extract and parse the operation command of the storage node access.
Three, the advantages of different
1, SCSI hard disk: interface speed, and because it is mainly used for servers, so the hard disk itself is also relatively high performance, the hard disk speed, cache capacity, low CPU occupancy, scalability is far superior to IDE hard disk, and support for hot-swap.
2, SATA hard disk: can effectively filter the noise from the normal signal, good noise filtering ability to make SATA as long as the use of low voltage operation can be.
Baidu Encyclopedia - scsi hard disk
Baidu Encyclopedia - SATA hard disk