Author Topic: external USB drive not visible  (Read 2331 times)

Offline Sams dad

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external USB drive not visible
« on: January 24, 2016, 03:13:54 pm »
Hello all,

I have a Western Digital SATA 500gb drive installed in a Nexstar CX USB enclosure. The drive was formatted NTFS / mbr on a Dell laptop running Windows XP Pro several years ago. The CX enclosure is powered by a wall wart (no power drawn from USB port), and I use the same cable no matter what device I attach to.

The Dell died of old age, and I bought an HP14 Chromebook to replace it. I set the HP to dual boot Chrome OS or a Peppermint 6 live USB (32bit). The WD drive is recognized by both: mounts, can be read and written to without any problems.

I recently bought an Intel i3NUC SFF desktop to replace  the (now also dead) Shuttle I put together 10-12 years ago. I installed Peppermint 6 respin (64bit) on it, and everything works great, EXCEPT the WD USB drive. It seems to be invisible to the NUC, not showing up in Drives or Files or anywhere else.

When I "sudo fdisk -l" only the internal SSD and SATA drives are listed. I know the NUC USB port is OK, because another WD passport drive plugged in there is fine (also NTFS / mbr).

I no longer have acess to any Windows machines, so cannot run chkdisk to verify/repair the WD drive as suggested on some forums. I did download a windows rescue disk (took FOREVER on AT&T snail speed internet), but was unable to do anything useful with it.

There's more. I plugged a USB optical drive into the NUC, and booted to a live CD of Peppermint 6, 32bit. The WD drive mounted and could be read from and written to just fine. Then I repeated this, but with a Peppermint 6, 64bit, respin CD. No WD drive visible again. Is there something about the 64bit version that causes the WD to not be recognized ?

I have Googled my problem, but did not find anything exactly like this.

 Anyone have a clue what's going on ?

ps: when I "sudo fdisk -l" on the live USB Peppermint 6, this is the result for the WD drive:

Code: [Select]
model: WDC WD50 00AAKX-001CA0(0000)
size: 500gb
partition: mbr
serial number: DCA C58225FFF
device: sdc
partition type: HPFS/NTFS
sector: 512 bytes
« Last Edit: January 24, 2016, 03:20:01 pm by AndyInMokum »

Offline PCNetSpec

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Re: external USB drive not visible
« Reply #1 on: January 24, 2016, 03:41:10 pm »
Are all the USB ports USB 3.0 ?

Have you tried it in all the USB ports ?
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Offline PCNetSpec

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Re: external USB drive not visible
« Reply #2 on: January 24, 2016, 03:45:13 pm »
Unplug the USB drive from the USB port

wait a few seconds

replug the USB HDDD

then post the output from:
Code: [Select]
dmesg | tail -n 40
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Offline Sams dad

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Re: external USB drive not visible
« Reply #3 on: January 24, 2016, 04:24:38 pm »
The spec sheet says all 4 ports are 3.0, with one front one suitable for charging. Tried one front, one rear.

Here are the "dmesg | tail -n 40" results:

Spoiler (click here to view / hide)
[close]



I will be shutting down soon, will check back in the morning.

Thanks
« Last Edit: January 24, 2016, 04:48:09 pm by AndyInMokum »

Offline AndyInMokum

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Re: external USB drive not visible
« Reply #4 on: January 24, 2016, 04:46:55 pm »
Hi Sams dad, could you please remember to encapsulate terminal outputs with the Insert, Code # function.  For extra long outputs, please use the Spoiler, Sp function.  It preserves the original format of the output.  This makes it easier for future visitors to relate to their own issues.  These functions are found in the forum editor, above the,  :-[ Embarrassed and  the :'( Cry emoticon respectively.  I've done this for you this time - many thanks  ;).
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Re: external USB drive not visible
« Reply #5 on: January 25, 2016, 05:25:00 am »
have you tried the suggestion in the last posting here:
https://bbs.archlinux.org/viewtopic.php?id=198460
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Offline Sams dad

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Re: external USB drive not visible
« Reply #6 on: January 25, 2016, 02:15:26 pm »
Hello Again,

First, I checked the BIOS; fastboot is not enabled, and I could not find anything like "turbo boot".

Next, just as a shot in the dark, I plugged the WD drive into the $3.00 Walmart unpowered USB2.0 hub that I use to connect my mouse and keyboard (saves a port on the NUC, and has an SD card slot, too).

After a couple seconds, the WD drive pops up in Drives!!! I opened Files, mounted it, and could read and write to it without a problem.

So now I can access the drive on the NUC, but I'd still like to know why it won't work on the 3.0 ports (except when booting from the 32bit live CD).
The Chromebook port I use is 3.0, and it works there.

Any thoughts?

Thanks, Sams dad








Offline PCNetSpec

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Re: external USB drive not visible
« Reply #7 on: January 25, 2016, 07:41:51 pm »
possibly a kernel regression .. what kernel are you on?
Code: [Select]
uname -a
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Offline Sams dad

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Re: external USB drive not visible
« Reply #8 on: January 26, 2016, 03:15:39 pm »
Here's the result:

Code: [Select]
Linux joe-desktop 3.16.0-50-generic #67~14.04.1-Ubuntu SMP Fri Oct 2 22:07:51 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Sams dad

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Re: external USB drive not visible
« Reply #9 on: January 27, 2016, 03:25:30 am »
Would you like to try a more recent kernel and see if that helps ?
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Offline Sams dad

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Re: external USB drive not visible
« Reply #10 on: January 27, 2016, 01:27:57 pm »
That sounds a little above my abilities (not a total Linux newbie, but don't feel comfortable doing something like that!).
 
Since everything else works great, and the WD is usable on the 2.0 hub,I don't want to chance breaking things.
The speed difference between USB 2.0 and 3.0 is not a big deal for my usage.

I'll keep an eye here for a few days, and if nothing else pops up, I'll mark it solved (sort of).

Thanks for your help,
Sams dad

Offline AndyInMokum

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Re: external USB drive not visible
« Reply #11 on: January 27, 2016, 02:14:21 pm »
That sounds a little above my abilities (not a total Linux newbie, but don't feel comfortable doing something like that!).
 
Since everything else works great, and the WD is usable on the 2.0 hub,I don't want to chance breaking things.
The speed difference between USB 2.0 and 3.0 is not a big deal for my usage.

I'll keep an eye here for a few days, and if nothing else pops up, I'll mark it solved (sort of).

Thanks for your help,
Sams dad
When you feel like doing it, let us know.  I know messing with the kernel sounds intimidating.  In reality, it really easy to to do.  We'd guide you through it, step by step and if it doesn't help.  We'd restore you back to how you are now.  It's worth a try if PCNetSpec has suggested it  ;).
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