On Thu, Oct 15, 2009 at 11:44 AM, James Courtier-Dutton <james.dut...@gmail.com> wrote: > 2009/10/14 Robert Millan <r...@aybabtu.com>: >> But I don't think this would be desireable except in very specific >> situations, >> and I'm not sure which ones. Perhaps loading a compressed file would be an >> example (so that uncompression and disk poll can be done in parallel). >> > > Not specifically related, but why is grub reading a file from a USB > stick so slow when compared with say reading the HD. > I mean slow, it is about 20 times slower here.
What model USB stick? Consumer-grade NAND flash controllers really are 10-15x slower than a recent SATA hard disk. (7MB/s vs 110MB/s on read). Only the expensive SSD, which access many NAND flash chips in parallel, can meet or exceed hard disk speeds. And USB 2.0 High Speed maxes out at about 1/3 of hard disk speed, Firewire 800 or USB 3.0 Ultra or eSATA would overcome that. But most likely you are just using slow flash memory with a cheap controller. > > > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > http://lists.gnu.org/mailman/listinfo/grub-devel > _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
