On Wed, 2008-10-22 at 16:32 +0200, Avi Kivity wrote: > Ric Wheeler wrote: > > One key is not to replace the drives too early - you often can recover > > significant amounts of data from a drive that is on its last legs. > > This can be useful even in RAID rebuilds since with today's enormous > > drive capacities, you might hit a latent error during the rebuild on > > one of the presumed healthy drives. > > > > Of course, if you don't have a spare drive in your configuration, this > > is not practical... > > Why would you have a spare drive? That's a wasted spindle. > > You want to have spare capacity, enough for one or two (or fifteen) > drives' worth of data. When a drive goes bad, you rebuild into the > spare capacity you have. > You want spare capacity that does not degrade your raid levels if you move the data onto it. In some configs, this will be a hot spare, in others it'll just be free space. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
