Hi, I've been reading the source code, and I've come to the following conclusions about the chunk-size for a raid1 device. The chunk size: (1) must be non-zero (2) must be a multiple of four (3) must be a multiple of the system page size (4) must be less than MAX_CHUNK_SIZE (4096*1024 on my system) and has no effect for raid1 devices. (Other than the device size is rounded down to the nearest multiple of the chunk size, so a really large chunk-size could cost you some space.) So, the example value of 128 in the raidtools-0.90/raidtab.samle file should work just fine for about everybody. - David Harris Principal Engineer, DRH Internet Services
