Hi all, I've recently gotten a new HD for my TiBook (40 Gig :), which makes relatively loud noise when moving the head.
At first, it did that every five seconds, which, as you can imagine, is unsupportable after a few minutes. I've since tried to find what accesses the disk every five seconds, and come to the combination pmud with APM emulation/asapm. Now to the problem I found with pmud: - To start with, is it normal that the disk accesses the on-disk data for the FIFO _that_ often? It seems both pmud and asapm are configured with 1 second intervals for writing/reading the FIFO. - My first thought was to move the APM emulation FIFO out of /etc/power onto a tmpfs partition. File in memory; no disk access needed... But trying to do that I've found a weird behaviour with pmud's options: Specifying 'pmud -a /tmpfs/apm' just silently ignores option '-a'. Recompiling pmud from source with some debug printk's proved that. The solution was to remove the space between '-a' and the argument. Normal? Bug in pmud? Bug in getopt_long()? While we're at it, does anybody have other ideas to eliminate disk acceses? I've already done these: - switch back to ext2 from ext3 (ext3 prevents the HD from spinning down) - install noflushd - tune the bdflush parameters in /proc/sys/vm - remount with noatime while on battery In particular, how about devfs? I'd suppose having devfs in memory saves the atime/ctime/mtime changes on the /dev FS nodes (which is metadata to the FS, right?)? Cheers, and thanks for any comments Michel ------------------------------------------------------------------------- Michel Lanners | " Read Philosophy. Study Art. 23, Rue Paul Henkes | Ask Questions. Make Mistakes. L-1710 Luxembourg | email [EMAIL PROTECTED] | http://www.cpu.lu/~mlan | Learn Always. " -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
