docs: add note on supported filesystems

certain filesystems cannot be used as chunkstores, because they don't
support 2^16 subdirectories (e.g. ext4 with certain features disabled
or ext3 - see ext4(5))

reported via our community forum:
https://forum.proxmox.com/threads/emlink-too-many-links.73108/

Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
This commit is contained in:
Stoiko Ivanov 2020-07-17 14:55:17 +00:00 committed by Thomas Lamprecht
parent 65418a0763
commit e9b44bec01

View File

@ -139,6 +139,12 @@ or ``zfs``) to store the backup data.
Datastores are identified by a simple *ID*. You can configure it
when setting up the backup server.
.. note:: The `File Layout`_ requires the file system to support more than
65537 subdirectories per directory. This excludes certain filesystems and
filesystem configuration from being supported as datastore. For example
``ext4`` without the ``dir_nlink`` feature (which is enabled by default)
and ``ext3``.
Datastore Configuration