Messages in this thread | | | Date | Wed, 23 Sep 2009 07:08:58 -0500 | From | will <> | Subject | disk speed regression kernel 2.6.29 and after |
| |
I had been using an old 2.6.22 kernel on my machine, and I often backup one partition of my main hard drive to a partition on a second hard drive. The main hard drive is sata 640 gigs, and the second is a pata 320 gig. copying this partition from one drive to the other with dd takes about 3 minutes and 30 seconds. When I installed kernel 2.6.30, and 2.6.31, the time took 9 minutes and 20 seconds. I decided to go to the trouble of compiling all the kernels between, and kernels 2.6.22-2.6.28 all do the operation in about 3 minutes and 30 seconds. 2.6.29- newer all take about 9 minutes and 20 seconds. The partition is 16 gigs. each drive seems to be as fast as before otherwise, it's just much slower copying from one drive to another, which I do very often. This is an nforce 3 based motherboard, amd southbridge, i think, with 4 gigs of ram, athlon 64x2. 32 bit kernel. has anyone heard of this problem? I currently have 3 hard drives hooked up. a 200 gig on a promise controller, a 320 gig on the amd pata? a 640 sata on the nv i think. The motherboard is a Asrock-AM2NF3-VSTA copying this partition with dd or cat or schily's dd between any of these 3 different hard drives takes different times depending on the speed of the drive with kernels 2.6.22-2.6.28, but takes about 9 minutes and 30 seconds on any of the drives with the kernels 2.6.29 and after. Please cc me with any followups or anything. thanks.
| |