Re: Unsupported USB 2.5" Mediasonic Drive Enclosure (h21-su3)

Graham Fleming wrote:
> Thank you. -d sat,12 worked pretty well. However, I got these errors at the end of the output:
>
>
> Read SMART Log Directory failed: scsi error medium or hardware error (serious)
>
> Read SMART Error Log failed: scsi error medium or hardware error (serious)
>
> Read SMART Self-test Log failed: scsi error medium or hardware error (serious)
>
> Read SMART Selective Self-test Log failed: scsi error medium or hardware error (serious)
>
> I was still able to get the attributes like read error and seek error, etc.

Similar result was reported for 0x2109:0x0701
("-i, -c, and -A work, most other commands rejected with sense key 4")

Even 12-byte SAT pass-through is apparently not fully implemented by 
this USB bridge firmware.


> -x vs -a didn't make a huge difference.

It doesn't because -x enables commands which require 48-bit ATA commands 
which require 16-byte SAT pass-through (-d sat[,16]).


> Also on Mac OS X 10.9.3, smartctl 6.2 2013-07-26 r3841 [x86_64-apple-darwin13.0.0] (local build), this did not work: Smartctl open device: /dev/disk4 [SAT] failed: Invalid argument

SAT relies on SCSI pass-through I/O-control which is missing on Mac OS 
X, see:
http://www.smartmontools.org/wiki/USB

Thanks,
Christian


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