On Mar 14, 2013, at 8:38 PM, Andrey Borzenkov <arvidj...@gmail.com> wrote: >> >> I have anecdotal evidence these drives are now in the wild. Mac user with a >> new 3TB Seagate USB 3 external drive: >> Device / Media Name: Seagate Backup+ Desk Media >> >> This is not very descriptive. But when I ask the user to display the GPT >> with gdisk, there's normal output, except for this line: >> Logical sector size: 4096 bytes >> >> Next, when I have him report the result from: >> sudo dd if=/dev/disk3 count=2 2>/dev/null | hexdump -C >> >> The 1st 512 bytes reported is the PMBR, but the 2nd 512 bytes is garbage, >> not the GPT header as expected. >> > > It is possible that you need to read in physical sector size; what if > you try bs=4k?
Right, for a 4Kn drive, to read LBA 1 and get the GPT header I'd need: sudo dd if=/dev/disk3 skip=8 count=1 2>/dev/null | hexdump -C Chris Murphy _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
