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I'm using Debian 6.03 (2.6.32-5-amd64) with LVM configured. For testing I created testfs logical volume and formatted it in reiser4 filesystem. But when I try:

# mount /dev/lv-group/testfs /mnt

it says:

mount: unknown filesystem type 'reiser4'

reiser4progs are also installed. What's the problem?

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  • What feature are you using the reiser filesystem for over some of the other very stable filesystems out there like ext4? ext3? xfs?
    – mdpc
    Mar 19, 2012 at 18:19
  • @mdpc it's just testing of filesystem's performance.
    – mickey
    Mar 19, 2012 at 18:37

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You aren't running a patched kernel with reiser4 support. It was never merged into the mainline kernel and since Hans Reiser is in prison for the murder of his Wife, it is a dead filesystem. If you are looking for similar features, look at btrfs, but it is still not ready for production environments.

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  • ok, is it good idea to use btrfs in system which reads/writes ~2k or more small files?
    – mickey
    Mar 19, 2012 at 18:24
  • @mickey, yes, btrfs handles small files well.
    – psusi
    Mar 19, 2012 at 20:37

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