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Re: eSATA drive won't mount. Wrong data rate ?



On Thu, 2008-10-02 at 16:07 -0400, Linuxguy123 wrote:
> 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 ?
----
Is it a type II cable? Is it a type II interface in your 'combo' hard
drive case?

Craig


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