> If the partition was to start at the next head after the MBR > (i.e. CHS=0/1/1) and span the whole remaining disk, then the size field > in the partition table should be 7812425502 or 0x1D1A8271E hex (which > is too big to fit in 32 bit and would be truncated to 0xD1A8271E).
You've certainly accomplished more calculation than I'm capable of executing! A very logical approach. Mine was much more "seat-of-my-pants". In my prior reply, I detailed what I did the first time to recover the disk successfully. I omitted the fact that I recreated an MSDOS partition first and attempted to recover to that: `parted /dev/sdb mklabel msdos` `parted /dev/sdb rescue 0 -1` This in fact did still find the partition -- but again, only ~1.8TiB of it showed up in parted. Unless the rescue option has different restrictions compared to creation of a new partition, it was almost certainly case #1 that I described earlier, where both msdos and gpt partitions simultaneously existed on the same device -- or a different case, where somehow the gpt partition was somehow overwritten with an msdos partition -- otherwise I expect I would have been able to recover the full 4GB using an msdos label, which was not the case. It is also worth mentioning that there has been no corruption at all of the 280GiB worth of contents on the drive; we have gone over everything with a fine toothed comb and there is no damage or corruption whatsoever (phew!). Here is the new partition geometry as you requested: ------- sectors ------- Disk /dev/sdb: 7812415488s Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags 1 63s 7812409494s 7812409432s xfs --------- cylinders --------- Disk /dev/sdb: 486300cyl Sector size (logical/physical): 512B/512B BIOS cylinder,head,sector geometry: 486300,255,63. Each cylinder is 8225kB. Partition Table: gpt Number Start End Size File system Name Flags 1 0cyl 486299cyl 486299cyl xfs ----------------------- cylinders/heads/sectors ----------------------- Disk /dev/sdb: 486300,95,2 Sector size (logical/physical): 512B/512B BIOS cylinder,head,sector geometry: 486300,255,63. Each cylinder is 8225kB. Partition Table: gpt Number Start End File system Name Flags 1 0,1,0 486299,254,57 xfs --------- fdisk x p --------- Disk /dev/sdb: 255 heads, 63 sectors, 486300 cylinders Nr AF Hd Sec Cyl Hd Sec Cyl Start Size ID 1 00 0 1 0 254 63 1023 1 4294967295 ee 2 00 0 0 0 0 0 0 0 0 00 3 00 0 0 0 0 0 0 0 0 00 4 00 0 0 0 0 0 0 0 0 00 Unfortunately I'm really crushed with work right now (catching up on all the lost hours over the past couple days) but my hope is that a little later this week I can make a second copy of the drive contents then see if I can recreate the problem. It's not going to be highly scientific or anything, but I'm hoping that within the space of 15-20 minutes I can recreate the problem and post back some definite steps to cause the problem again. At least, I *hope* I can recreate the problem. I'll actually be a lot more worried if I can't. Cheers, Kevin W. _______________________________________________ bug-parted mailing list bug-parted@gnu.org http://lists.gnu.org/mailman/listinfo/bug-parted
