Max number of files

Looking up EXT3 in Wikipedia, I came across this:

"The maximum number of inodes (and hence the maximum number of files and directories) is set when the file system is created. If V is the volume size in bytes, then the default number of inodes is given by V/213 (or the number of blocks, whichever is less), and the minimum by V/223. The default was deemed sufficient for most applications. The max number of subdirectories in one directory is fixed to 32000."

While I have not done the calculation, but the number seems very large. You must either have a very large number of small files, or HP has a different limit.

Duo v2 runs ext4 so your theoretical maximum is going to be 4 billion files, but you're still going to max out your inodes way before you hit that limit.

Not sure what the inode size on the Media Vault is (you could find out with 'dumpe2fs -h /dev/mdX | grep -i inode') but on the Duo v2 it's 256.

On mine it looks something like this (I have 1x2tb):

root@nas-FF-84-E5:~# cat /proc/sys/dev/boot/info | grep model:
model:  ReadyNAS Duo v2
root@nas-FF-84-E5:~# dumpe2fs -h /dev/c/c | grep -i inode
dumpe2fs 1.41.14 (22-Dec-2010)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Inode count:              60735488
Free inodes:              60735469
Inodes per group:         2048
Inode blocks per group:   128
First inode:              11
Inode size:               256
Journal inode:            8
Journal backup:           inode blocks