On Monday July 10, henrik.holst@xxxxxxxxxx wrote: > Karl Voit wrote: > [snip] > > Well this is because of the false(?) superblocks of sda-sdd in comparison to > > sda1 to sdd1. > > I don't understand this. Do you have more than a single partion on sda? > Is sda1 occupying the entire disk? since the superblock is the /last/ > "128Kb" (I'm assuming 128*1024 bytes) the superblocks should be one and > the same. Not exactly. The superblock locations for sda and sda1 can only be 'one and the same' if sda1 is at an offset in sda which is a multiple of 64K, and if sda1 ends near the end of sda. This certainly can happen, but it is by no means certain. For this reason, version-1 superblocks record the offset of the superblock in the device so that if a superblock is written to sda1 and then read from sda, it will look wrong (wrong offset) and so will be ignored (no valid superblock here). 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
