Messages in this thread | | | Subject | Re: Is there a way to keep the 2.6 kjournald from writing to idle disks? (to allow spin-downs) | From | Felipe Alfaro Solana <> | Date | Sun, 25 Jan 2004 20:26:10 +0100 |
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On Sun, 2004-01-25 at 19:29, Lutz Vieweg wrote: > Hi everyone, > > I run a server that usually doesn't have to do anything on the local filesystems, > it just needs to answer some requests and perform some computations in RAM. > > So I use the "hdparm -S 123" parameter setting to keep the (IDE) system disk from > spinning unneccessarily. > > Alas, since an upgrade to kernel 2.6 and ext3 filesystem, I cannot find a way to > let the harddisk spin down - I found out that "kjournald" writes a few blocks every > few seconds. > > As I wouldn't like to downgrade to ext2: Is there any way to keep the 2.6 kjournald > from writing to idle disks? > > I cannot see a good reason why kjournald would write when there are no dirty buffers - > but still it does.
Have you tried playing with the laptop-mode patch? It's already in the -mm kernel tree from Andrew Morton. I've been playing with it a little (just a few minutes) and seems keep the disks spun down for some time. However, I haven't been able to get it suit my needs, since I use apps like Evolution which are continuously writting to the disk.
If you are willing to play with it, I recommend you downloading the latest -mm patch from http://www.kernel.org, untar the sources and then read Documentation/laptop-mode.txt.
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