[PLUG] Mediasonic failure?

John Jason Jordan johnxj at gmx.com
Wed Mar 21 18:48:38 UTC 2018


Why didn't I think of that?

OK, first I unplugged it from the laptop and plugged it into the
Desktop. It appeared immediately and the Desktop happily mounted it and
ls displayed all folders and individual files. Yay! (So far anyway.)
Then I went back to the laptop and tried various USB jacks, but nada.
However, dmesg gave me this:

[234517.633973] usb 4-1: Disable of device-initiated U1 failed.
[234517.637438] usb 4-1: Disable of device-initiated U2 failed.
[234517.746532] usb 4-1: reset SuperSpeed USB device number 6 using
xhci_hcd [234517.762595] usb 4-1: device firmware changed

None of that makes any sense to me.

On Wed, 21 Mar 2018 11:20:57 -0700
wes <plug at the-wes.com> dijo:

>I would watch /var/log/messages or dmesg output as I plug in the device
>(maybe try a couple of systems to see if there's a difference).
>
>If there's no output, the enclosure is dead and your drives are
>probably ok.
>
>If you get some output, there may be a hint as to the problem there.
>Could be anything at this point.
>
>-wes
>
>On Wed, Mar 21, 2018 at 11:15 AM, John Jason Jordan <johnxj at gmx.com>
>wrote:
>
>> The command ls -la has always displayed all the directories first and
>> then individual files. Suddenly it just displayed the directories.
>> But then I discovered that it did display individual files for other
>> folders, the problem was only with one folder: /media/jjj/Movies. And
>> that folder is a Mediasonic USB enclosure holding a 6TB and an 8TB
>> SATA3 disk set up as Raid0.
>>
>> I decided to umount it and then mount it again, but I kept getting
>> busy error messages, even though anything that might be accessing it
>> is shut down. Finally I just powered it down and then turned it back
>> on. The display lights on the front of the case look normal, but it
>> does not appear. I also swapped the cables, but no joy.
>>
>> The device is 99.9% backed up to my Synology; the only thing I might
>> lose is one movie that I ripped this morning from a DVD that I own.
>>
>> A quick check tells me that I bought the Mediasonic case and the 8TB
>> WD drive in the summer of 2016. The 6TB is also WD, but a couple
>> years older.
>>
>> Where would you start to sleuth out what went wrong?
>> _______________________________________________
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>>
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