Stuart Henderson wrote: > On 2007/12/17 15:51, Pontus Pihlgren wrote: > >> Also, how important is speed? I think a read speed of 20 MB/s is quite >> sufficient, no? >> > > I don't think you'll get close to 20MB/s. > > For OpenBSD you'll get the best speeds from a card which supports > multi-sector IO (6MB/s or so?). The Sandisk cards I've seen do, > many others are 1-sector only and a lot slower on OpenBSD (2MB/s > or so; looks like DMA is disabled in those cases - I'm not sure > whether that's necessary, and doesn't apply to all OS, but it's > the way it is at the moment). > Oh, that sounds a bit discouraging. Isn't CF just a variant of the IDE bus, and should therefore be able to reach speeds of 33 - 133 MB/s depending on the controller. I realize that a caveat in the OpenBSD driver could slow things down, but all the way to 2MB/s ? I'm not saying you are wrong, I'm just surprised. Have you done some benchmarks?
Also, how would I identify a card with multi-sector IO. > I've been buying 2GB cards recently, 1GB weren't much cheaper > and 4GB cost a lot more (this probably varies according to local > conditions!). > Sounds about the same as here (sweden). I guess prices might have dropped a bit, the difference between 2 and 4 GB is not that big. Thanks, Pontus. > _______________________________________________ > Soekris-tech mailing list > [email protected] > http://lists.soekris.com/mailman/listinfo/soekris-tech > _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
