On Wed, Jan 22, 2003 at 22:26:00 +0100, Michel Lanners composed: > On 22 Jan, this message from [EMAIL PROTECTED] echoed through cyberspace: > > >> - check your hard disk speed: hdparm -tT /dev/<disk with kernel source> > >> (is non-destructive; post the result to compare) > > > > 1. Timing buffer-cache reads: 128 MB in 3.73 seconds = 34.32 MB/sec > > Timing buffered disk reads: 64 MB in 18.10 seconds = 3.54 MB/sec > > > > 2. /dev/sda: > > Timing buffer-cache reads: 128 MB in 3.68 seconds = 34.78 MB/sec > > Timing buffered disk reads: 64 MB in 12.71 seconds = 5.04 MB/sec > > 34 MB/sec for buffered reads s essentially a measure of memory > bandwidth. And 34 MB/sec seems low for a 7500-class machine. I get 45 > MB/sec (OK, on an interleaved memory config).
that may be because of the smallish amount of RAM on this thing; interleaved i was getting pretty much the same ratings. it may have to do with the RAM sticks' actual ms speed rating - i have 4MB sticks @ 70 ms IIRC, and some 8MB sticks @ 60 ms. > 3.54 MB/sec for disk is low; 5.04 is about acceptable for an older SCSI > disk. Unfortunately Apple fitted those systems with _horrible_ disks > (like the Quantum Fireball TM's). this isn't the default drive. it's a seagate ST39173N (can't remember the name ATM). which is rated @ 7200 rpm. i think that's the bus, more than the actual disc. > > On my IDE disk in the 7600, connected to a Promise IDE controller, I get > 12 MB/sec. That _does_ help a lot for kernel compiles. i'm sure that would help serving web pages too. maybe i can improve things just with a SCSI card installed, and some extra RAM (in time). until then, this thing is just gonna be slower than it could be :/. thanks all, simon > Cheers > > 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] > -- *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* |UNIX is user friendly, it's just picky about who its friends are.| *-----------------------------------------------------------------* | ,''`. http://www.debian.org/ | http://www.nuit.ca/ | | : :' : Debian GNU/Linux | http://simonraven.nuit.ca/ | | `. `' | [EMAIL PROTECTED] | | `- | PGP key: 3744 810B 50F5 187E | *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*