On Fri, 2007-09-28 at 15:55 -0600, Karl Larsen wrote: > Aaron Konstam wrote: > > On Fri, 2007-09-28 at 12:07 -0700, John Wendel wrote: > > > >> Lamar Owen wrote: > >> > >>> On Friday 28 September 2007, Karl Larsen wrote: > >>> > >>>> I was lead to mis-understand the data rate of my new SATA hard > >>>> drive. It indicated that the data rate was 3 GB/sec. But some checking > >>>> with Google said the Hard Drive makers are very free with their units. > >>>> To be specific a SATA drive is 3000 MegaBits/second. This boils down to > >>>> about 375 MB. > >>>> > >>> Due to the 8B/10B coding used in SATA, you can divide the bitrate by ten and > >>> not eight to get the byterate. Thus, 3Gb/s is 300MB/s at the wire. The > >>> semi-standard way of differentiating between bits per second and bytes per > >>> second in specs is to use a lower-case b for bits, and an upper-case B for > >>> bytes, but unfortunately not everyone follows that. > >>> > >> Your talking about the wire speed. The REAL speed is determined by the > >> disk drive. You're lucky to get 75MB/s with a desktop drive. > >> > >> Regards, > >> > >> John > >> > > Try hdparm -T and hdparm -t > > > These just list what the file hdparm can do in very brief terms. And # > hdparm is not working at all well on my F7. > What does hdparm return when you try it? . -- ======================================================================= The cost of living hasn't affected its popularity. ======================================================================= Aaron Konstam telephone: (210) 656-0355 e-mail: akonstam@xxxxxxxxxxxxx
