Messages in this thread | | | Date | Sun, 08 Jun 2008 10:41:29 -0500 | From | Roger Heflin <> | Subject | Re: libata.force=1.5Gbps doesn't seem to work |
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Nick Craig-Wood wrote: > Ever since I changed to AHCI (by fiddling with random options in the > BIOS) my external SATA drive is being run at 3.0 Gbps. However it > doesn't seem reliable at that - maybe the cable is too long. (It is > probably about 80cm in total - one standard SATA cable going to the > case and another from the case to the drive). > > I read in Documentation/kernel-parameters.txt that a command line of > > libata.force=1.5Gbps > > Should force all my SATA disks to 1.5 Gbps. > > However this doesn't seem to work.
I cannot help with the option not working, but you might see if the drives can be jumpered to force 1.5Gbps, I know a number of the manufacturers have jumpers to force 1.5Gbps since a number of older chipsets (Via sata and probably others) don't properly auto-neg 1.5Gbps on a 3.0Gbps drive, and fail to work at all.
Roger
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