On Monday 02 March 2009 07:09:31 Momesso Andrea wrote: > On Sun, Mar 01, 2009 at 02:03:28PM -0500, Allan Gottlieb wrote: > > At Sun, 01 Mar 2009 17:49:36 +0100 KH <gentoo-u...@konstantinhansen.de> wrote: > > > Peter Humphrey schrieb: > > >> As it's Sunday, here's an odd little thing. > > >> > > >> Not long ago, while booting this machine, four ext3 partitions > > >> needed checks on remount count reaching zero. They had been set to > > >> 23, 24, 25 and 26 mounts. (I didn't choose the numbers; they were > > >> allocated at the time I was creating the file system.) > > >> > > >> Now, this box does get rebooted, but hardly 23 x 24 x 25 x 26 = > > >> 358,800 times all told. At, say, two reboots per day, that would > > >> take rather a long time: a little under 500 years if my arithmetic > > >> is working. > > > > > > Hi, > > > > > > this is incorrect. 179400 mounts would be enough (24 and 26 can both > > > be divided by 2).
I wasn't sure how to allow for this common factor, so I ignored it. Thanks for the clarification. And no, 250 years is not a lot more credible than 500! So you might say my error was not significant. > > Correct. I erred in saying that 23,24,25,26 are relatively prime as > > you noted. In general if it was a1,a2,...an the answer would be > > LCM(a1,a2,...,an), where LCM abbreviates Least Common Multiple. > > > > allan Nicely put. > What about battery? If that's a laptop checks are deferred if running on > battery at boot time, so it can happen that all the partitions are > fscked the first time you boot on AC. It isn't a laptop. It's an ordinary desktop box (or a workstation, depending on your point of view: it was sold as a workstation - and it certainly makes enough noise for one). And the other contribution, about manual mounting, is also a red herring. If anyone thinks I contributed a hundred thousand operations to the total, they need to spend a little time in a quiet room :-) -- Rgds Peter
