>> {Sigh} Never having had disks big enough to hit that limit, I
>> wasn't aware of it. However, would I be right in thinking the
>> said limit goes up if one uses 4k blocks? If so, what to?
> Yes.
> With 4KB blocks you can address 1024*1024*1024*4096 bytes = 4TB
> in ext2.
Let's see if I've understood that correctly:
Block size Can address Total Formula
~~~~~~~~~~ ~~~~~~~~~~~ ~~~~~ ~~~~~~~
1k 256*256*256*1024 16G (1k)^4/64
4k 1024*1024*1024*4096 4T (4k)^4/64
Presumably...
2k 512*512*512*2048 256G (2k)^4/64
8k 2048*2048*2048*8192 64T (8k)^4/64
If so, then for any given block size B, we can address (B^4)/64 blocks
using the ext2 file system?
Would I also be right in thinking that if we were able to do one more
level of indirect block, we would multiply the capacities by B/4 in
each case, giving capacities of 4T, 64T, 1E and 16E for ext2 file
systems using 1k, 2k, 4k and 8k blocks respctively?
Best wishes from Riley.
+----------------------------------------------------------------------+
| There is something frustrating about the quality and speed of Linux |
| development, ie., the quality is too high and the speed is too high, |
| in other words, I can implement this XXXX feature, but I bet someone |
| else has already done so and is just about to release their patch. |
+----------------------------------------------------------------------+
* ftp://ftp.MemAlpha.cx/pub/rhw/Linux
* http://www.MemAlpha.cx/kernel.versions.html
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