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docs: removable datastores: expand notes on supported file systems

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Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
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Thomas Lamprecht 2024-11-27 19:50:35 +01:00
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docs/storage.rst
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@ -171,11 +171,16 @@ Removable datastores have a ``backing-device`` associated with them, they can be
mounted and unmounted. Other than that they behave the same way a normal datastore mounted and unmounted. Other than that they behave the same way a normal datastore
would. would.
They can be created on already correctly formatted partitions, which, as with normal They can be created on already correctly formatted partitions, which should be
datastores, should be either ``ext4`` or ``xfs``. either ``ext4`` or ``xfs`` as with normal datastores, but most modern file
systems supported by the Proxmox Linux kernel should work.
.. note:: FAT filesystems don't support the concept of POSIX file ownership. Since .. note:: FAT-based file systems do not support the POSIX file ownership
datastores rely on it, removable datastores can't be created on those filesystems. concept and have relatively low limits on the number of files per directory.
Therefore, creating a datastore is not supported on FAT file systems.
Because some external drives are preformatted with such a FAT-based file
system, you may need to reformat the drive before you can use it as a
backing-device for a removable datastore.
It is also possible to create them on completely unused disks through It is also possible to create them on completely unused disks through
"Administration" > "Disks / Storage" > "Directory", using this method the disk will "Administration" > "Disks / Storage" > "Directory", using this method the disk will