On Monday November 29, armenb@xxxxxxxxxx wrote: > However, my attempts at trying to determine the exact location of the > physical partition from the location of the raid superblock and the > size of the "enclosed partition" (sb->size) has not given me much luck > (I probably am making erroneous assumptions about where exactly the > raid superblocks are located). The raid superblock are located at the start of the last complete 64K aligned 64K chunk of the device. i.e. round down the size to a multiple of 64K, and subtract 64K. If all your raid5 partitions were (exactly) the same size, then sb->size will be the location of the raid superblock in the partition, so subtracting one from the other should give you the start of the device. > > Is there any kind of software setting or tool that those in-the-know > can recommend that I use for determining the locations of the physical > partitions based on the location of the RAID superblock? (or anything > else for that matter!) I recommend you look at mdadm http://www.kernel.org/pub/linux/utils/raid/mdadm/ (use 1.8.0, not 1.8.1). It won't do exactly what you want, but you may still find it helpful. Good luck. 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
