On Jul 8, 2006, at 7:46 PM, Ron Johnson wrote:
and hdparm reports: /dev/hda: multcount = 16 (on) IO_support = 0 (default 16-bit) unmaskirq = 0 (off) using_dma = 1 (on) keepsettings = 0 (off) readonly = 0 (off) readahead = 8 (on) geometry = 2434/255/63, sectors = 39102336, start = 0That might be part of your trouble. /dev/hda: multcount = 0 (off) IO_support = 1 (32-bit) <<<<<<<< unmaskirq = 1 (on) <<<<<<<< using_dma = 1 (on) keepsettings = 0 (off) readonly = 0 (off) readahead = 256 (on) geometry = 30401/255/63, sectors = 488397168, start = 0
Hmmm...I'm in serious need of some education here. (my main experience is with PowerPC) Are these settings part of the BIOS? hdparm manipulations don't seem to be persistent across reboots.
I also notice that there's a big discrepancy in the readahead. What are the tradeoffs of bumping this number? It just preloads the disk controller's cache, right?
--rich