[dm-devel] [PATCH v3] libmultipath: Allow discovery of USB devices
Martin Wilck
mwilck at suse.com
Tue Sep 29 09:33:52 UTC 2020
On Mon, 2020-09-28 at 21:09 +0200, Frank Meinl wrote:
> This change adds a new configuration option allow_usb_devices. It is
> disabled by default, so that the behavior of existing setups is not
> changed. If enabled (via multipath.conf), USB devices will be found
> during device discovery and can be used for multipath setups.
>
> Without this option, multipath currently ignores all USB drives,
> which
> is convenient for most users. (refer also to commit 51957eb)
>
> However, it can be beneficial to use the multipath dm-module even if
> there is only a single path to an USB attached storage. In
> combination
> with the option 'queue_if_no_path', such a setup survives a temporary
> device disconnect without any severe consequences for the running
> applications. All I/O is queued until the device reappears.
>
> Signed-off-by: Frank Meinl <frank.meinl at live.de>
Reviewed-by: Martin Wilck <mwilck at suse.com>
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