On Tue, 22 Oct 2002, Chris Siebenmann wrote: > At a guess: when RAID-5 is intact, the kernel must read the entire > stripe size worth of data to verify the parity. When a RAID-5 array has > a dead disk, any intact data block can be handed to the application > the moment it comes off the disk as there is no point in doing parity > verification. (The kernel has to reconstruct the missing blocks, but > most of the blocks are present and good.) i thought raid5 was doing parity calculation when writing ? difference between rading from failed an intact raid5 is almost twice the speed (failed is doing 150MB/sec, intact is doing 80MB/sec) - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
