Hans wrote: > >I have a little question. Smartctl is telling me, that my ssd drive is 6Gb/sec >capable, but the actual speed is only 1,5GB/sec. > >The notebook is a little bit older, AMD CPU with 2x2,4 GHz, 4GB RAM, debian/ >testing. > >My question is now: How is the speed of the ssd set? Is it set by the hardware >or is it set during loading the kernel module? > >And is there a possibility to set the speed to 6Gb/sec , i.e. by setting some >parameters or by loading the kernel modules with additional tags? > >I searched the web, but found no other information than "use trimming" (which >does the kernel during installation automatically, and this system is >correctly trimmed). > >It would be nice, if someone knows more. Strangely, my netbook got 3Gb/sec, my >Notebook only 1,5 Gb/sec, so I have the idea, it might be a configuration >thing.
You're seeing the different transport speeds of different SATA versions. SATA 1 does up to 1.5Gb/sec, SATA 2 does up to 3 GB/sec, SATA 3 -> 6 GB/sec. The drive will be reporting that it's capable of SATA 3 (hence the 6GB/sec number), but it will fall back to older modes as needed for compatibility with the controllers in your computers. -- Steve McIntyre, Cambridge, UK. st...@einval.com "You can't barbecue lettuce!" -- Ellie Crane
