On Monday March 27, raziebe@xxxxxxxxx wrote: > i have playing with raid5 and i noticed that the arriving bios sizes > are 1 sector. > why is that and where is it set ? bios arriving from where? bios from the filesystem to the raid5 device will be whatever size the fs wants to make them. bios from the raid5 device to the component devices will always be 1 page (typically 8 sectors). This is the size used by the stripe cache which is used to synchronise everything. NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html