Immediately after I posted wrote this I found that a smartmontools user
posted a patch 20 hours ago which implements ATACB support:
Please note that I have NOT tested this myself.
On Sun, 24 Feb 2008, Bruce Allen wrote:
> Hi John,
> I don't think that in most cases you will be able to get SMART info from USB
> drives. In the past year, I have heard that one of the USB interface chip
> vendors has started to support the pass-through of SMART commands and data,
> but smartmontools has not been modified to retrieve or use data from this
> Some information can be found here:
> Quoting directly:
> "It has been reported that many external USB enclosures use a "Cypress"
> chipset. This contains an ATACB proprietary pass through (for ATA commands
> passed through SCSI commands) for which some publicly available information
> is available. Smartmontools has no ATACB specific code but may move in this
> direction in the future. Another approach is to hope USB and SBP2 external
> enclosures adopt the SAT standard in the near future. One interesting comment
> about ATACB is that it should not be used at the same time as other types of
> access to the disk (e.g. a mounted file system)! That implies that a disk
> should be taken offline before smartmontools is used on it. It also implies
> that the smartd background daemon should not be used."
> A Western Digital engineer has reported: "Our USB retail products are heading
> towards using SAT as the passthru interface."
> When this happens, the '-d sat' flag should be used to access SMART on those
> On Sat, 23 Feb 2008, John Smith wrote:
>> I have been reading mail list and after one hour im a
>> little confused.
>> Im working with internal, external (usb case) and
>> external (adaptor sata/ide-usb) disk drives.
>> wich ones are supported to see smart info?
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