When I moved from 2.4 to 2.6, 2.6 was approximately 1/2 to 2/3 of the speed for on disk transfers for a 2 disk software raid0. Went from something like 70MB/s to 50MB/s. The only change before/after was those necessary to move to 2.6. Further tuning and 2.6 improvements gained a few MB/s back, but I never got close what 2.4 was doing. A disk failure and new MB means I cant duplicate the tests with 2.6.11, but I am talking something like 2.6.2.
I think knoppix has a 2.6 kernel on the same CD, you could try booting that so the comparison is at least closer. BillK On Mon, 2005-04-11 at 21:38 +0200, Richard Fish wrote: > Alexander Veit wrote: > > > geometry = 4867/255/63, sectors = 78198750, start = 0 > > geometry = 65535/16/63, sectors = 40037760000, start = 0 > > > > > > Well, the obvious thing for me is the difference in the drive geometries > between the two systems...the 2.6 kernel is seeing the entire drive > while the 2.4 kernel is only seeing ~39G worth. I remember seeing a > message somewhere that LBA48 addressing was pretty slow on some > systems. I'm googling now, if I find anything I'll post a followup. > > -Richard > > -- > gentoo-user@gentoo.org mailing list > -- William Kenworthy <[EMAIL PROTECTED]> Home! -- gentoo-user@gentoo.org mailing list
