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You could use the mountpoint command to check if there is something
mounted on destination drive like:<br>
<br>
if ! mountpoint $DESTINATION_DIR >/dev/null; then<br>
mount -t ntfs PARTUUID=c6040663-9321-4d28-91f0-2f3eb35f72b7
/mnt/Ext3TB_Data1/<br>
fi<br>
if ! mountpoint $DESTINATION_DIR >/dev/null; then<br>
mount -t ntfs PARTUUID=f88c9c86-e44d-4846-9fbe-305074347e97
/mnt/Ext3TB_Video1/<br>
fi<br>
<br>
I'll leave it up to you to handle what to do if the drive doesn't
mount.<br>
<br>
Brian Cluff<br>
<br>
<div class="moz-cite-prefix">On 9/9/20 1:34 PM, AZ Pete via
PLUG-discuss wrote:<br>
</div>
<blockquote type="cite"
cite="mid:782a713a-9b3c-16cb-dfdd-6b88bf5e9649@SonoranZen.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<font face="Calibri">Hi all,<br>
<br>
I was finally able to do away with an aging Windows machine and
replace it with a Raspberry Pi 4 running Buster. The only
purpose for this server is to backup selected folders and files
from other servers onto two external USB drives for offsite
storage. I've automated the backup process using rsync and a
cron job. All is working well and the backups are happening on
schedule.<br>
However, currently I have to manually mount each of the external
drives. This isn't a terribly big issue since the drives are
rotated to offsite storage only once per month. But, if the Pi
gets rebooted, the drives are not being auto-mounted and the
backups will then fail. I've tried putting an entry in
/etc/fstab to auto-mount them at boot, but if they drives are
not connected at boot time, I've found the the Pi doesn't boot
(it just seems to hang). <br>
</font><br>
<font face="Calibri"><font face="Calibri">Here is how I mount the
drives.<br>
mount -t ntfs PARTUUID=c6040663-9321-4d28-91f0-2f3eb35f72b7
/mnt/Ext3TB_Data1/<br>
mount -t ntfs PARTUUID=f88c9c86-e44d-4846-9fbe-305074347e97
/mnt/Ext3TB_Video1/<br>
<br>
</font>How can I "conditionally" mount an external drive based
on if the drive is currently connected? I could write a script
that checks if the particular partition (PARTUUID) is currently
connected but not mounted and put this script in the rc.local
folder to be executed at boot. <br>
Is this the best way? I'm sure that others have encountered this
issue and wanted to know what the "best practices" are on how to
achieve this?<br>
<br>
Any thoughts would be appreciated.<br>
<br>
Thanks,<br>
Peter<br>
<br>
<br>
<br>
<br>
</font> <br>
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