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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

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Old 07-14-2016, 08:45 AM   #16
littlejoe5
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New observation!

I don't know if this apparatus: “Sabrent USB-DSC8" has been making good contact through any of this process. From the beginning I was having some difficulty plugging the SATA conector into the Sabrent adaptor, and finally noticed that the internal part on the adaptor is not straight, or even. When you plug it in one side moves away so that those connections may not have been making good contact (connections 1-3 or so, see: http://www.interfacebus.com/SATA_Pinout.html).

I tried a different Sata drive, with the same inadequate results, and then (using the same Sabrent adapter, but the ATA part of the connector, and an ATA (or IDE) drive, and made a good connection and was able to open, and even format the ATA drive.

I tried an older adapter that I had here, with the 3TB drive and got a completely different reading. Here is the result of the command: dmesg | tail after plugging this older one in with the 3TB drive:

$ dmesg | tail
[ 520.263294] sd 11:0:0:0: [sdd] Write Protect is off
[ 520.263302] sd 11:0:0:0: [sdd] Mode Sense: 00 38 00 00
[ 520.264277] sd 11:0:0:0: [sdd] Asking for cache data failed
[ 520.264285] sd 11:0:0:0: [sdd] Assuming drive cache: write through
[ 520.267567] sd 11:0:0:0: [sdd] Asking for cache data failed
[ 520.267583] sd 11:0:0:0: [sdd] Assuming drive cache: write through
[ 520.703094] sdd: unknown partition table
[ 520.706213] sd 11:0:0:0: [sdd] Asking for cache data failed
[ 520.706227] sd 11:0:0:0: [sdd] Assuming drive cache: write through
[ 520.706238] sd 11:0:0:0: [sdd] Attached SCSI disk

clearly, still a problem, but a different one it seems. ("sdd: unknown partition table" doesn't make much sense, since this drive works fine as an internal drive, on the same machine and OS).

I'm going to send this thing back, and put this problem 'on the shelf' for now, until I have a better waysdd: unknown partition table to pursue it - unless this bit of news sparks a comment that will set me straight on this.

Thanks again for all your suggestions. And sorry that I didn't catch this sooner.
 
Old 07-14-2016, 09:18 AM   #17
LukeRFI
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Quote:
Originally Posted by Doug G View Post
Make sure your external usb enclosure supports > 2gb disks also. Some have 2tb limits.
I'd say that this is your problem, with 99% certainty. If the drive detects fine when connected directly via SATA, it is definitely an issue with the USB bridge. If the issue persists when connected directly, I'd be inclined to think that there is an issue with the drive, itself.
 
Old 07-19-2016, 02:07 AM   #18
littlejoe5
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I noticed (after much trying, and researching, and after all of your help), that the data conection on the new Sabrent adapter I had just purchased, was broken inside so that one side of the male rail ("L" shaped) was moving away while plugging it in. I contacted the company, and they asked me to send it back at their expense, and sent me a good one.

Plugged it in to the USB2 slot of my desktop. and it found all nine of the partitions and mounted them without a problem. (It was a little slower to discover and mount the 9th, which is most of the 3Tb drive.) Haven't tried it on the laptop yet, but I'm now confident that it will work.

Thanks so much for all your help. I'm going to mark this solved.
 
Old 07-19-2016, 06:10 PM   #19
Doug G
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I'm happy to hear you found and fixed the problem.
 
  


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