Rich Smrcina <[EMAIL PROTECTED]> writes:
> I could swear this came up recently, but of course I can find no reference to
> it. What are the file and file system size limitations for the 2.4 kernel?
> Do dofferent levels of the 2.4 kernel change this? Does any of this change
> based on the type of file system used (ext2, ext3, reiser)?
from http://www.suse.de/~aj/linux_lfs.html:
+-----------------------------------------------------------------------------+
|Background LFS in Linux Background |
|-----------------------------------------------------------------------------|
| |
| Large File Support in Linux |
| |
...[extensive information for Kernels back to 2.2 and glibc back to
2.1 and for all filesystems and many distributions]
| Some Other Often Requested Data about Filesystems |
| |
| Maximum On-Disk Sizes of the Filesystems |
| |
| +---------------------------------------------------------------------+ |
| | Filesystem | File Size | Filesystem | |
| | | Limit | Size Limit | |
| |------------------------------------------+------------+-------------| |
| |ext2 with 1 KiB blocksize |16448 MiB (~|2048 GiB (= 2| |
| | |16 GiB) |TiB) | |
| |------------------------------------------+------------+-------------| |
| |ext2 with 2 KiB blocksize |256 GiB |8192 GiB (= 8| |
| | | |TiB) | |
| |------------------------------------------+------------+-------------| |
| |ext2 with 4 KiB blocksize |2048 GiB (= |16384 GiB (= | |
| | |2 TiB) |16 TiB) | |
| |------------------------------------------+------------+-------------| |
| |ext2 with 8 KiB blocksize (Systems with 8 |65568 GiB (~|32768 GiB (= | |
| |KiB pages like Alpha only) |64 TiB) |32 TiB) | |
| |------------------------------------------+------------+-------------| |
| |ReiserFS 3.5 |4 GiB |16384 GiB (= | |
| | | |16 TiB) | |
| |------------------------------------------+------------+-------------| |
| |ReiserFS 3.6 (as in Linux 2.4) |1 EiB |16384 GiB (= | |
| | | |16 TiB) | |
| |------------------------------------------+------------+-------------| |
| |XFS |8 EiB |8 EiB | |
| |------------------------------------------+------------+-------------| |
| |JFS with 512 Bytes blocksize |8 EiB |512 TiB | |
| |------------------------------------------+------------+-------------| |
| |JFS with 4KiB blocksize |8 EiB |4 PiB | |
| |------------------------------------------+------------+-------------| |
| |NFSv2 (client side) |2 GiB |8 EiB | |
| |------------------------------------------+------------+-------------| |
| |NFSv3 (client side) |8 EiB |8 EiB | |
| +---------------------------------------------------------------------+ |
| |
| Note Kernel Limitations: The table above describes limitations of the |
| on-disk format. The following kernel limits exist: |
| |
| * On 32-bit systems with Kernel 2.4.x: The size of a file and a block |
| device is limited to 2 TiB. By using LVM several block devices can |
| be combined enabling the handling of larger file systems. |
| * 32-bit systems starting with around 2.5.43: The size of a file is |
| limited to 2 TiB. Note that the system call statfs64 does not give |
| the correct information back for file systems using more than 2 TiB |
| (df will display wrong results). |
| * 64-bit systems: The sizes of a filesytem and of a file are limited |
| by 263 (8 EiB). But there might be hardware driver limits that do |
| not allow to access such large devices. |
| |
| Note in the above: 1024 Bytes = 1 KiB; 1024 KiB = 1 MiB; 1024 MiB = 1 |
| GiB; 1024 GiB = 1 TiB; 1024 TiB = 1 PiB; 1024 PiB = 1 EiB (check http:/ |
| /physics.nist.gov/cuu/Units/binary.html) |
| |
| Maximum Number of Partitions |
| |
| An IDE disk has 64 minors, one is used for the full disk and therefore |
| 63 partitions are possible. A SCSI disk has 16 minors and therefore |
| only 15 partitions maximal. |
| |
| |
| Thanks to Andi Kleen, Matti Aarnio, Rogier Wolff, Chris Mason, Andreas |
| Schwab, Lenz Grimmer, Andries Brouwer, Urban Widmark, Bruce Allen and |
| Jana Jaeger for additions to and comments on the contents of this page. |
| Andreas Jaeger |
| Last modified: Mon Jan 27 11:54:01 CET 2003 |
| |
| |
|-----------------------------------------------------------------------------|
|Background LFS in Linux Background |
+-----------------------------------------------------------------------------+
hth
--
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