Messages in this thread | | | Date | Wed, 23 Sep 2009 21:07:29 -0600 | From | Robert Hancock <> | Subject | Re: disk speed regression kernel 2.6.29 and after |
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On 09/23/2009 06:08 AM, will wrote: > 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.
Can you post the dmesg output from bootup on both the good and bad kernels?
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