Comments on: Testing NO RAID vs RAID 5 vs RAID 10

By: Old Technology – Will Caching Help? | wagamama.ca

Old Technology – Will Caching Help? | wagamama.ca — Tue, 07 Apr 2015 02:09:42 +0000

[…] The hard drives use the on-board Intel RAID controller. Operating in RAID 10, which based on my previous testing gave the best write […]

By: Adam Satern

Adam Satern — Thu, 29 Jan 2015 21:28:00 +0000

Be mindful of hard errors which are the reason that RAID no longer lives up to its original promise.
If one of the drives fails, then during the rebuild if you get an error – the entire array will die.

http://www.zdnet.com/article/why-raid-5-stops-working-in-2009/

SATA drives are commonly specified with an unrecoverable read error rate (URE) of 10^14. Which means that once every 12.5 terabytes, the disk will not be able to read a sector back to you.

By: MySQL replication woes – error 1236 | wagamama.ca

MySQL replication woes – error 1236 | wagamama.ca — Sun, 02 Nov 2014 09:54:19 +0000

[…] weekend one of my servers lost a hard drive. One of the NEW WD red hard drives, I just wrote about a few weeks ago. The drives have only been in production for less than two months and one has failed […]

By: rgunther

rgunther — Thu, 18 Sep 2014 08:37:55 +0000

In reply to Remi. The WD red drives I used were the 2.5 inch version, since that is what the servers hold. They are not the best for performance, if you have the ability to use 3.5 inch disks they are faster. If you are using Raid 10, or Raid 0 you are going to approx. double the disk performance. I did test 7200 RPM server disks as well (single drive) in this thread. That drive performs about the same as the WD red drives in Raid 10, but it is a 3.5 inch drive that spins at 7200 RPM - and is not so expensive (about $60 right now). If you can run two of those in Raid 10 or Raid 0 you will double the performance of the WD Red 2.5 inch.

By: Remi

Remi — Wed, 17 Sep 2014 21:56:08 +0000

Hey! Thanks for sharing these results! I’m building myself a new system and was thinking if using WD reds as my main desktop drives (not in an NAS enclosure).

Considering I would configure them in RAID10 to increase performance and security, how would they perform as opposed to single drives that spins at 7,200 rpm? Have you done these kind of tests?