Francois Caen frcaen@gmail.com wrote:
Wow! Odd! RH says 8TB but ext3 FAQ says 4TB.
Any filesystem originally designed for 32-bit x86 is full of signed 32-bit structures. The 2^31 * 512 = 1.1TB (1TiB) limit comes from those structures using a 512 sector size.
Ext3 has used a couple of different techniques to allow larger and larger support. Depending on the hardware, kernel (especially 2.4), etc..., there can be limits at 1, 2, 4, 8 and 16TiB.
Which is why the "common denominator" is 1.1TB (1TiB). It was rather enfuriating in front of a client when I attempted to mount one Ext3 volume
From my personal testing on CentOS 4.1, you can't go over
4TB without kludging.
I then did a software RAIDO across them, and finally:
mke2fs -b 4096 -j -m 0 -R stride=1024 -T largefile4
/dev/md0
Joshua, thanks for the reply on this. There's something kludgy about having to do softraid across 2 partitions before formatting. It adds a layer of complexity and reduces reliability. Is that the trick RH recommended to go up to 8TB?
-- Francois Caen, RHCE, CCNA SpiderMaker, LLC _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos