Ron Johnson <ron.l.johnson@cox.net> [2002-11-18 11:45:01 -0600]: > > this problem, but generally using a journaling file system on a laptop > > is a Bad Idea (TM). > > Because of battery drain? Yes. One way to reduce battery drain is to have the hard drive powered off. A typical laptop with the disk powered down can run for ten times as long as one with the disk powered up, YMMV. RAM will either be a real ram disk or a buffer cache. Operating off of a ram disk with the hard drive powered off I could run an old laptop of mine for more than 8 hours on battery. But if the filesystem keeps the hard drive awake by writing to it every few seconds then you can't power it down and can't save the power and you are stuck with much reduced battery life. In my case less than an hour. BTW... I am battling this same problem myself with a fresh install on my laptop. I can see it is going to take me a while to figure out the tuning to get it back into long life mode again. I can't get my disk to power off either. Bob
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