SAS interface is compatible with SATA devices, but SATA interface is not compatible with SAS devices. Generally speaking, SATA standard is a sub-standard of SAS standard, which contains more instructions and more control and detection technologies.
The SAS interface is usually provided only on the server motherboard. When considering the cost of some servers, a relatively cheap SATA hard disk can be used instead of SAS hard disk. If you have a SAS interface, you can safely connect to ordinary SATA devices.
Extended data:
A damaged disk means that it can't respond to any reading and writing commands and needs to be replaced. Raid 5 can recover all the data from the saved peer-to-peer data and rebuild the defective disk. There is nothing wrong with the disk group itself, but one of the disks has bad blocks (that is, unreadable blocks), which makes some data unrecoverable.
Mathematically speaking, the mean time between failures (mtbf) of each disk is about 500,000 to 6.5438+0.5 million hours (that is, hard disk damage occurs every 50 to 654.38+0.5 years). This ideal situation is often not achieved in practice. Under most heat dissipation and mechanical conditions, the normal working time of hard disk will be greatly reduced.
Considering that the life of each disk is different, any disk in the array may have problems. From a statistical point of view, the probability of failure of n disks in an array is n times that of a single disk.