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Date: Thu, 2 Sep 2021 08:25:02 +0200 (CEST)
From: Dietmar Maurer <dietmar@proxmox.com>
To: Proxmox Backup Server development discussion <pbs-devel@lists.proxmox.com>, 
 Dominik Csapak <d.csapak@proxmox.com>,
 Thomas Lamprecht <t.lamprecht@proxmox.com>,
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Subject: Re: [pbs-devel] [PATCH v2 proxmox-backup 00/15] (partially)close
 #3156: Add support for removable datastores
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> > Hmm, what would you do if more than one of them are plugged in at the same time?
> > Maybe hard to time on a running system, but possible if I connect a hub with
> > devices already plugged in, and can definitively happen (by mistake) on cold boot.
> > 
> 
> my guess is that the udev rules do not trigger simultaneously ?

We detect both devices ...

> and even if, we could lock the mount/unmount so that this
> does not make a problem and we simply mount the first
> triggered one

Why not simply sync to both disks?