Have a look in /etc/sysconfig. I'm not sure about LM but in redhat there's a config file that set hdparm with certain at boot time. If you can't find anything there have a look at /etc/rc.d/rc.local. If there's no call to hdparm add one at the bottom with your desired options. Also be careful with those data transfer values. What program did you use the measure it?? Did you use bonnie or something similiar. Also be aware that 33MB/sec is the maxmimum transfer rate of the IDE interface. If there a two devices on the same IDE-Channel then they have to share that rate. Maybe your CPU is the problem. I don't know why but for me reiserfs is pushing a hard job to my CPU. On an AlphaStation 200 with 233MHz the performance of my harddrive dropped from about 18-20MB/sec (ext2) to about 7 or 8 MB/sec (reiserfs) - measured with bonnie++. The reason for that drop was that the CPU couldn't handle it faster (i.e. 98% cpu time, whereas ext2 almost nothing). And no, I don't have the extra checking option for reiser set. Since people say that reiser has the best performance I'm really wondering what would happen if I use another journaling FS. Gregor On 14-Sep-2001 Theo Brinkman wrote: > OK, found hdparm (would have sworn I'd already tried /sbin, but I guess not. > > Seems my drives are running in 16-bit mode. When I switch them to > 32-bit mode, drive performance nearly doubles (from 2.6-3.7 up to > 6.3-6.7 MB/sec). How do I convince it I want it to run in 32-bit mode > all the time. > > I seem to remember reading somewhere that numbers less than 14 MB/sec > indicate that the drive is not properly configured (as 33 MB/sec is what > you could maximally get out of pre UDMA drives). Someone please correct > me if I'm wrong. > > My other (older) laptop also seems to default to 16-bit mode, but it's > numbers are [16-bit] 7.59 MB/sec & [32-bit] 7.62 MB/sec. I'd expect my > new laptop with a 20GB drive (same height and spindle speed) to be > faster than the old 4GB drive. Am I off base here, or not? > > - Theo > > Theo Brinkman wrote: > >> I am running Mandrake 8.0 on my Toshiba Satellite 2805-S402 (one of >> the nice shiny ones with the GeForce2Go). The performance is great >> except for one aspect. The hard drive performance under Linux seems >> to be much worse than under Win2K. I ran hdparm -t shortly before I >> did a reinstall hoping I might spot an elusive option that might >> help. In the process of the reinstall, I seem to have missed the >> package with hdparm in it, so I can't be sure, but I'm not seeing any >> performance (it takes less time for my old PII 233 Satellite 4000 to >> load up Mozilla). Once things are loaded into memory, performance is >> great, but it takes almost 10 seconds for a terminal window to pop up >> the first time, but only about 1 second for a second one. >> >> What can I do to boost hard disk performance. I've got /, /usr/local, >> and /home set up as ReiserFS partitions, and /boot as ext2 (that >> little trick let me upgrade my kernel in 7.1 without the ReiserFS >> filesystem work-around, so I kept with it). >> >> I can't verify it until I find the rpm which contains hdparm, but I >> think I remember the result of hdparm -t was 2.6 or 6.2 Mb/sec. >> Obviously, either of those is FAR slower than it should be. >> >> - Theo >> >> >> >>------------------------------------------------------------------------ >> >>Want to buy your Pack or Services from MandrakeSoft? >>Go to http://www.mandrakestore.com >> >> message.footer >> >> Content-Type: >> >> text/plain >> Content-Encoding: >> >> 8bit >> >> > > > ---------------------------------- E-Mail: Gregor Maier <[EMAIL PROTECTED]> Date: 14-Sep-2001 Time: 07:34:28 ----------------------------------
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