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Re: ext3 4TB fs limit on amd64 (FAQ?)

Christian Kujau wrote:
On Sun, 26 Nov 2006, Ralf Gross wrote:
I've a question about the max. ext3 FS size. The ext3 FAQ explains that
the limit is 4TB.

Hm, strange: I'm pretty sure that mkfs.ext3 understands bigger blocksizes for quite a while now. Then again, the FAQ says "Version: 2004-10-14"...

So, although I'd really love to have this information (and the FAQ!) on
http://e2fsprogs.sf.net/  this is what I found:

blocksize    file size limit     filesystem size limit
 1 KiB        16448 MiB (~ 16 GiB)    2048 GiB (= 2 TiB)
 2 KiB         256 GiB         8192 GiB (= 8 TiB)
 4 KiB        2048 GiB (= 2 TiB)     16384 GiB (= 16 TiB)
 8 KiB         65568 GiB (~ 64 TiB)     32768 GiB (= 32 TiB)

Note that an 8 KiB blocksize is only supported on systems with 8 KiB pagesize (i.e. linux/alpha).

Is this still true? 8KiB pagefile only on linux/alpha? We run RHEL4-AS x64_86 on AMD Opteron, and the OS is going to let me create the 8192 block size on a 9TB partition, but it's giving a warning:

partition is: Disk geometry for /dev/sda: 0.000-9296872.000 megabytes

[root dudemiestro ~]# mkfs.ext3 -b 8192 -m 1 /dev/sda1
Warning: blocksize 8192 not usable on most systems.
mke2fs 1.35 (28-Feb-2004)
mkfs.ext3: 8192-byte blocks too big for system (max 4096)
Proceed anyway? (y,n)

Anyone do this before and had any kind of success?



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