How well do SSDs work in RAID 1?
March 18, 2010 5:57 AM Subscribe
Would a pair of Solid State Disks in a RAID 1 perform proportionally worse than a pair of HDDs in a RAID 1? Are there any significant gotchas to running a Windows 7 RAID pair on SSDs?
posted by Danaid to Computers & Internet (9 answers total)
I'm considering buying a pair of mid-level SSDs to put in a laptop*. The OS would be windows 7 64, which supports the SSD feature 'TRIM'. I am somewhat confused about the way Windows 7 does software RAID; would the TRIM feature continue to be used (i.e. is TRIM, as spoken by windows, used at the physical device level, below the software RAID level?)
This got me wondering about RAID on SSD vs HDD. There are some posts on various forums that seem to indicate that the striping schemes used by RAID controllers/software isn't compatible with the way SSDs store data.
I'm also curious to know if the way that RAID is designed (with spinning disk in mind) is more detrimental when used with SSDs. It seems like some folks are already redesigning things like databases (example here
So, if a theoretical penalty for 2 HDDs in RAID 1 is 10% performance, would the penalty for 2 SSDs be higher or lower? My guess is that performance would actually be better, as you aren't waiting for 2 spinning disks to seek and write.
*Why? Redundancy and because I can