On Dec 17, 2007, at 8:59 PM, Iustin Pop wrote: > On Mon, Dec 17, 2007 at 11:28:51PM +0100, Pontus wrote:
>> 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? > > FWIW, on a 5501 with DMA enabled and on Linux, using a SanDisk > SDCFX3-2048 (and indeed multi-sector): > > # dd if=/dev/hda1 of=/dev/null bs=128k iflag=direct > 377+1 records in > 377+1 records out > 49512960 bytes (50 MB) copied, 6.80798 seconds, 7.3 MB/s Flash is not very fast in general. Spinning disks are much faster at sequential reads. The performance gain you always hear about with flash is actually the random access speed, because solid-state media doesn't have seek times. _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
