Re: Problem with ahci and a external sata disk

[Tejun Heo <htejun@xxxxxxxxx>]

Jose Alberto Reguero wrote:
> [root@jar Pls]# hdparm -I /dev/sdd
> 
> /dev/sdd:
> 
> ATA device, with non-removable media
>         Model Number:       ST3750640AS
>         Serial Number:      5QD3Q2AZ
>         Firmware Revision:  3.AFM
>
> How can be so diferent that the one make with esata?

That's because your enclosure is emulating IDENTIFY command when
attached via SATA.  It's emulating USB mass storage device when
connected via USB but your enclosure is good enough to implement ATA
command passthrough and as hdparm issues IDENTIFY using command
passthrough, it gets to the actual drive and returns the result directly.

-- 
tejun
--
To unsubscribe from this list: send the line "unsubscribe linux-ide" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html