Re: ataraid issue was Re: [netbsd-7] Critical issue with ffs+log

[BERTRAND Joël <joel.bertrand%systella.fr@localhost>]

Michael van Elst a écrit :
> joel.bertrand%systella.fr@localhost (=?UTF-8?Q?BERTRAND_Jo=c3=abl?=) writes:
>
> > 	By dkctl wd0/1 setcache none save ? I will try next saturday. But if
> > both disks are unsynchronized, how can I force a resynchronization ?
>
> There is no sane way. For a resynchronization you'd need at least a single
> bit that tells you that both sides are out of sync (and better some
> kind of journal or a parity map).
>
> Copying the raid to itself will of course synchronize both disks.

	I don't understand. If I use a real raid controler (or raidframe), I 
can remove and readd a disk and I have to resynchronize raid volume. 
Maybe is my question trivial, but with ataraid, how can I swap device 
when a physical disk is dying ?

	Regardsn

	JKB