[openbeos] Re: sync daemon?

On Tue, 16 Jan 2007 19:41:26 -0500, Karl vom Dorff said:

> Just playing with Haiku, and the amount it crashes or hangs, I'm 
> always 
> losing information. I was wondering if there was ever a utility for 
> BeOS, or 
> if it would be something to consider adding to Haiku.
> 
> A daemon that would sync the disk every 5 minutes or so. Maybe this 
> is 
> beyond my understanding or I have it wrong, but the way I see it, 
> even in 
> BeOS, if your system crashed or hung while you were working on 
> something, or 
> say stuff you downloaded, well that would be gone upon restart. There 
> is no 
> scan disk in BeOS.

Yes, this seesm to be beyond your understanding. :) No offfense meant. 
The disk cache is supposed to be flushed form time to time (it sesms it 
is not right now, but this is not a task for a sync daemon as you 
propose). BeOS didn't have a scan disk because BFS is a journaled 
filesystem and is able to recover from most crashes gracefully.

Other than that, the SCSI subsystem is missing support for the cache 
flush/sync command wich makes things worse. I am about to commit 
support for that on the tree which should help with data integrity.

-Bruno


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