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Subject: -7- How big can files and filesystems be?
Date: 15 Jun 1996 00:00:01 EST
A file on an EFS filesystem can be only 2G in size. The filesystem can
be no more than 8G in size, whether or not it is on a logical volume.
A physical or logical volume can be larger than 8G, but not usefully
so: mkfs still can't make a filesystem larger than 8G on it. (Each
block (512 bytes) has a unique number which must fit into 24 bits; 512
* 2^24 = 8G. See also inode(4).)
Note that 'fx' had a bug in versions of IRIX before 4.0.5H which
prevented it from *exercising* disks larger than 2G, but other 'fx'
functions and other parts of IRIX have no trouble with disks
(filesystems) up to 8G.
Files and filesystems on SGI's new XFS filesystem can be 1 terabyte
(1K gigabytes) in size. On 64-bit machines running IRIX 6.2, a file
will be able to be 9 exabytes (9 gigagigabytes) in size and a
filesystem will be able to be 18 exabytes in size. See the misc FAQ
under "WWW pages" for a pointer to a demonstration.
Up: SGI admin Frequently Asked Questions (FAQ)
Next: -8- My XFS filesystem is corrupt or inconsistent. How do I fix it?
Previous: -6- DISKS