# Suggestions for RAID levels **URL:** \ **Category:** Elasticsearch\ **Created:** [November 14, 2012, 11:20pm UTC](https://discuss.elastic.co/t/suggestions-for-raid-levels/9722 "2012-11-14T23:20:39Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Paul\_C](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/paul_c/32/2604_2.png) [@Paul\_C](https://discuss.elastic.co/u/Paul_C)\ **Post date:** [November 14, 2012, 11:20pm UTC](https://discuss.elastic.co/t/suggestions-for-raid-levels/9722/1 "2012-11-14T23:20:39Z")
Given that we can provide redundancy @ the application level, what are people's general preferences on RAID levels? I'm tempted to go with either RAID0, or even use multiple path.data locations and just mount the disks bare. Systems will likely have 6 or 8 drives etc. Also has anybody tested performance differences between filesytem types ( xfs/ext4/?? ) and various mount options like noatime ? -- ---
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [November 15, 2012, 12:30am UTC](https://discuss.elastic.co/t/suggestions-for-raid-levels/9722/2 "2012-11-15T00:30:48Z")
I use SAS-2 disk subsystem with ext4 and noatime. noatime makes a huge difference, it gave me 30% more IOPS. The RAID controller has BBWC against power outages and for faster writes (I chose RAID-5 so a node is still active if a disk failure occurs). Jörg On Thursday, November 15, 2012 12:20:39 AM UTC+1, Paul C wrote: > Given that we can provide redundancy @ the application level, what are > people's general preferences on RAID levels? > > I'm tempted to go with either RAID0, or even use multiple path.data > locations and just mount the disks bare. Systems will likely have 6 or > 8 drives etc. > > Also has anybody tested performance differences between filesytem types ( > xfs/ext4/?? ) and various mount options like noatime ? -- ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 3:04am UTC](https://discuss.elastic.co/t/suggestions-for-raid-levels/9722/3 "2017-07-06T03:04:13Z")
Closed on July 6, 2017, 3:04am UTC