Maximum block dev size / filesystem size
From: Aaron Peterson
Date: Thu Oct 07 2004 - 15:26:30 EST
I work for a company with a 15 TB SAN. All opinions about the
disadvantages of creating really large filesystems aside, I'm trying to
find out what is the maximum filesystem size we can allocate on our SAN
that a linux box (x86) can really use.
I seem to be finding (from various posts on newsgroups and the kernel
source itself) that block devices with 2.4 kernels cannot exceed 2 TB,
so no matter what the filesystem can theoretically handle, 2 TB is the
practical limit.
I've read that XFS filesystems can theoretically be created up to 18
million TB in size.
What I can't seem to find anywhere is whether the 2 TB block device
limit has improved/grown with 2.6 kernels (on x86 hardware). Perhaps
I've looked in the wrong places, but I haven't found anything.
If you have any helpful information, or can point me towards a better
place to look I would be very appreciative.
I am not joined to this list, so if you can CC: me in the reply I would
also be grateful.
Aaron
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