On 18/09/16 20:58, Benjammin2068 wrote: > Aha! That's what I needed to know. > > I was wondering if I can make a partition (I think) that's 3/4 of a block larger (3072bytes) than the original /dev/sdX1's on the old HD103SJs drives. Good. It's a bit like string logic - if the buffer is bigger than the string everything's fine, but if the string is bigger than the buffer, well, ooopppssssss. Basically, I think the root cause of all this mess is that drive sectors/blocks/whatever used to be 512 bytes. So, obviously, it made sense to have sector 0 be the boot sector, and your first partition started in sector 1. If your drives are small, you don't want to waste space. Then the new drives came along with 4K sectors. Aarghh. Put an old-style partition scheme on a new-style drive, and every OS 4K block would start in the 2nd 512-byte block of a 4K drive sector. So every disk write from the OS would force the drive to read two sectors from disk, overlay the OS block over them, and write them both back. Not nice. And the latest drives refuse to do that! Which is one of the reasons why modern partitioning programs start the first partition - iirc - at the start of the 3rd megabyte of the disk. Leaving plenty of space for the boot/startup code. So it's not worth replicating your old partitions directly on the new drives. Just make sure the new drives are the same size (or a bit larger) than the old ones, and move the data across. Bit like copying a string :-) Cheers, Wol -- 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
