On Fri, Dec 31, 2004 at 06:28:49PM +0100, Spam wrote: > How can buying additional hardware be cheaper? Do you expect most > users, including Laptop users, to use UPS?
Almost all laptop users already have UPS.. it's called their batteries!!! > >> Okay, if you want to use the NVRAM on a desktop, it's waaaaayyyyyy too > >> little > >> to even consider. You'll need NVRAM (battery backed up etc.) in the > >> order of Megabytes to make it of any use Spam. > > I thought NVRAM already was battery backed up or was as flash?\ YEs, but those few bytes (not even kilobytes) is one too small to do anything usefull for a cache/journal/whatever related to a filesystem, and also way too slow to access. > With a simple pointer we can know the latest journal entry that was > surely saved before the power loss (you can update the NVRAM when > you tell the disk to sync etc). When you reboot the the fsck tools > can scan all the journal entries that occurred after to verify that > the data is on disk or not. This must be much faster than doing a > full scan of the entire filesystem? How can disk require several > megabytes? I am not talking about storing the journals in the NVRAM. I believe the reiserfs team would appreciate the code if you could prove it usefull ;-)
