[CentOS] xfs question

[James A. Peltier]

----- Original Message -----
| John R Pierce wrote:
| > On 8/4/2015 7:14 AM, m.roth at 5-cent.us wrote:
| >>
| >>  CentOS 6.6 (well, just updated with CR). I have some xfs filesystems
| >> on a RAID. They've been mounted with the option of defaults. Will it break
| >> the whole thing if I now change that to inode64, or was that something
| >> I needed to do when the fs was created, or is there some conversion I
| >> can run that won't break everything?
| >
| > you can enable that option at any time, but once you've used it, you
| > can't go back.
| >
| > note that 64 bit inodes cause a minor issue with NFS if you have shares
| > exported other than the root.  there's an easy workaround.
| 
| Thanks, John. I believe I did exports elsewhere, last year. This just came
| up on a huge backup RAID - the rsync was failing, though there was plenty
| space, and inode64 just popped up from my stack - it was just the
| conversion that I didn't remember the answer to.
| 
| For those looking at this, here's a gotcha: you *cannot* change fstab,
| then mount -o remount, you *must* umount, then mount. Merely -o remount
| fails to make the change.
| 
|       mark

Some older 32-bit software will likely have problems addressing any content outside of the 2^32 bit inode range.  You will be able to see it, but reading and writing said data will likely be problematic

-- 
James A. Peltier
IT Services - Research Computing Group
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