RAID 5 HDD vs 512gb SSD
Go to solution
Solved by Captain_WD,
So im looking at two builds that cost exactly the same
4 x WESTERN DIGITAL WD10EZEX 1TB CAVIAR BLUE SATA3 running at raid 5 (i calculated that it will have 3T of space with read 450mb/s and write 150mb/s or lower)
http://www.wdc.com/wdproducts/library/SpecSheet/ENG/2879-771436.pdf
vs
1 x Crucial M550 512GB 2.5'' SSD (read 550 mb/s , write 500 mb/s)
or 2 x Crucial M550 256GB 2,5" SSD (read/write ~1000mb/s)
http://www.crucial.com/usa/en/storage-ssd-m550
What are your thoughts ?
edit: Third option could be Raid 10 with the WD resulting in 2TB space with read 6000 mb/s and write 300 mb/s)
Hey pitprok,
A SSD would be significantly faster than any regular HDD in a RAID setup (unless you push a lot of HDDs in striping mode, increasing the risk significantly). Another problem would be that WD Blue is not designed for RAID arrays and this might result in drive drop-outs, data corruption or data loss. I would recommend using NAS/RAID class drives for RAID environments as they have additional features in their firmware and tuning that enable them to work better and safer in such environments. WD Red is such a drive. Here's a link: http://products.wdc.com/support/kb.ashx?id=7woiFF
With RAID5 and RAID10 the read/write speeds are very uncertain as it heavily depends on the data and the way it is being read or written. You can roughly say that for writing with RAID10 you can take the speed of the slowest drive and multiply it by 2. For RAID5 it would be the same but there will be loss of speed and time to write due to the calculation of the redundancy that RAID5 offers.
Read speeds depend heavily on the way data is stored and used.
Captain_WD.
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now