Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

We recently purchased HP Lefthand 4500 G2 24TB box and also a DL380 G7 server. I'm running Centos 6.2 (RHEL 6.2).

The Lefthand box consist of 12 2TB HD's configured in RAID6. That gives me about 14.7TB usable space.

Scenario : iSCSI SAN for Fileserver at Advertising Agency.

Are there any recommendations / best practices on filesystem creation on iSCSI LUN's ? Regarding EXT4 or XFS? Write barriers, mkfs options on creating the filesystem ? Like, inode64, noatime etc....

XFS is preferred tho, as we will be hosting a large volume with >=1millions of files. My Plan is to create 6-8TB volume at the start.

As for now, the server and or Lefthand box is not connected to UPS, but will be real soon.

I have had really good experience with XFS over the last 10 years with large volumes but not so, if not at all any experience with EXT3/4 on large volumes.

Any recommendations and or help would be much appreciated.

Thanks allot. Best regards,

Svavar Reykjavik - Iceland

share|improve this question

I don't know the nitty gritty linux details, but if you have thin provisioning and you want it to work, make sure your file system doesn't write all over the drive.

share|improve this answer
The only option I know about for XFS, is the inode64 option when mounting. If I don't use the inode64 option the inodes will be stuck on the first 1TB (regardless of the rest). (more info :… ) – Svavar O May 29 '12 at 14:18

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.