Very, very, VERY weird event

[Kevin O'Gorman]

On Fri, Sep 26, 2014 at 7:54 PM, Karl Auer <kauer at biplane.com.au> wrote:

> Here's a good one.
>
> I logged into my home server to start a backup. Ran "mount" to see if
> the backup disk had mounted itself. It had - but two other USB HDDs
> normally mounted on boot were apparently not mounted! Argh! Home
> directories and a bunch of other stuff are on those drives, so this was
> a big problem.
>
> Note: The "mount" command showed no drives mounted except the internal
> HDD.
>
> I thought "darn, things will have been written to the mount points on
> the internal HDD", and sure enough, lots of files were visible under the
> mount points. So to see what sort of job I had ahead of me, I ran "du
> -s" on one of the mount points - and it said there were 57GB of data
> under it.
>
> Note: The internal HDD has one partition, of 10GB. "df -k" reported only
> 3GB used.
>
> I placed a new file in the mount point directory, and rebooted. The
> external HDDs mounted as normal - and the new file was visible on the
> mounted drive! Everything seems back to normal as far as I can tell.
>
> So it looks to me as if the drives were mounted all along, but the
> "mount" utility was not reporting them.
>
> Google is not much help because all the terms are so common (mount, USB
> etc).
>
> Is this something anyone else has seen? Are there any reliable ways to
> see what's mounted apart from the "mount" command? I stupidly didn't
> check /proc/mounts...
>
> Regards, K.
>

df(1) is your friend here.
There are probably others.
-- 
Kevin O'Gorman
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