Re: [smartmontools-support] WD MyBook Essential 500Gb (External USB)

[Christian F. <Chr...@t-...>]

Ursino Giuseppe wrote:
> Hi, 
> 	i've try to use smartctl one my external USB device (WD MyBook Essential 500Gb) but it doesn't works.
> Can you help me?
> ...
>
> # smartctl -d sat -ic -q noserial /dev/sda
> smartctl version 5.38 [i686-pc-linux-gnu] Copyright (C) 2002-8 Bruce Allen
> Home page is http://smartmontools.sourceforge.net/
>
> === START OF INFORMATION SECTION ===
> Device Model:     WDC WD5000AAVS-00ZTB0
> Firmware Version: 01.01B01
> User Capacity:    500,107,862,016 bytes
> Device is:        Not in smartctl database [for details use: -P showall]
> ATA Version is:   8
> ATA Standard is:  Exact ATA specification draft version not indicated
> Local Time is:    Tue Jul 14 14:20:02 2009 CEST
> SMART support is: Available - device has SMART capability.
> SMART support is: Enabled
>
> Error SMART Status command failed
> Please get assistance from http://smartmontools.sourceforge.net/
> Values from ATA Return Descriptor are:
>  00     09 0c 00 00 00 00 00 00  00 4f 00 00 00 00
> A mandatory SMART command failed: exiting. To continue, add one or
> more '-T permissive' options.
>
>   

This is a known Linux issue: The SCSI sense data needed for SMART STATUS 
is truncated by the kernel. With 5.38, the other functions may work if 
'-T permissive' is specified.

There is now a workaround in the smartmontools code. Please try current 
code from SVN if possible.


> -----------------------------------------
> The same for -d sat,12 and -d sat,16
>
>   

Older kernels only support '-d sat,12' over USB. I don't know which 
kernel version fixes this.

Cheers,
Christian