Server sas3008IR, do raid 1 of 2 pieces before, ready to add another piece of SSD hard disk for caching, restart in the system can see hard drive, don't know the SSD, speaking, reading and writing speed will slow down after the sas card, after all, not through sas card,

CodePudding user response:

Should be some factors affect the read and write speed

CodePudding user response:

Can consider to rent a server, 240 GSSD, data access speed

CodePudding user response:

The problem to specific analysis:

SAS card 1. You don't have direct function, so basically does not support the trim order, then your SSD the trim function will not work, unless your SSD with inside trim the latest technology
2. When the SSD trim function doesn't work, SSD writing will be greatly affected, and write life will continue to reduce, the write speed will be falling, and you the SSD is used to cache, will have a lot of write operation
3. Read what effect would not be
4. Test method: use the AS SSD software test, if the 4 k write very poor, so...