Re: eSATA drive won't mount. Wrong data rate ?
On Thu, 2008-10-02 at 16:45 -0500, Steve Siegfried wrote:
Linuxguy123 wrote:
<SNIP>
>
> One thing that sticks out for me in all this is the SATA data rate.
> Both the computer and the drive are supposed to be 3.0Gb/s devices. Yet
> the driver wants to connect at 1.5 Gbps.
>
> The Serial ATA Controller is listed as ahci in hwbrowser.
>
> # /sbin/lsmod | grep sat
> sata_sil24 16069 0
> libata 131937 3 ata_piix,sata_sil24,ahci
>
>
> How should I proceed to get my external drive working ?
>
Check the manual that came with your motherboard (or the hardware manual
that came with your computer). 3.0GB/s SATA is otherwise known as "SATA
II", "SATA 3.0" and/or "SATA/300". If it just sez
"SATA", it's 1.5Gbs
"SATA-I" and you either need a controller card or a new motherboard to
use the 3.0GB/s drives. Sadly some SATA-II drives don't automagically
downshift to SATA-I mode nicely... you may have one of these.
The shiny HP advertising brochure says "eSATA Port. Blazing next
generation 3Gb/sec data transfer to an external HDD."
So unless the marketing department got it wrong and the engineers never
read the brochures, its probably a 3Gb/sec port. I think that Linux
somehow gets the speed wrong.
Is it time to report this as a bug ?
LG