On Wed, Apr 20, 2016 at 12:58 PM, Weiner, Michael <weinerm(a)ccf.org> wrote:
From: chris(a)colorremedies.com [mailto:chris@colorremedies.com] On
Behalf Of Chris Murphy
On Wed, Apr 20, 2016 at 12:50 PM, Weiner, Michael <weinerm(a)ccf.org> wrote:
>> Because I believe that I built the 15Tb filesystem for ext3 using 8K
>> blocks when I set this up several years back
> What platform was it created on and has been used on until now?
CentOS 5.10 and yes, it was in use earlier in the day :(
It's probably a 4K blocksize if this was created on x86 (including
x86_64). I'm not sure what the cutoff was for 1K blocksizes and ext3,
I've definitely seen 1K blocksizes used for 250MB boot volumes from
that epoch. But 1K blocksize for 15TB? Anyway that's pretty incredible
to have a 15TB ext3 file system running on CentOS 5. I didn't know
that was even possible. That size filesystem in that era was
definitely XFS territory.
> At least XFS, ext4, and Btrfs right now can't mount file systems with blocks
larger than the pagesize, and on x86 Linux pagesize is 4K.
I thought 16Tb was the max ext3 that could be handled
The size of the filesystem is not what I'm talking about. An 8K
blocksize is valid for filesystem creation but invalid for mounting on
x86 32 or 64 bit. So if you're doing all of this on x86, it's not an
8KB blocksize. It's 4K or less.
--
Chris Murphy