On Mon, Jun 29, 2009 at 16:41, Marius Nünnerich<mar...@nuenneri.ch> wrote: > On Mon, Jun 29, 2009 at 16:14, Patrick M. Hausen<hau...@punkt.de> wrote: >> Hi! >> >> On Mon, Jun 29, 2009 at 03:38:51PM +0200, Marius Nünnerich wrote: >> >>> I'm sorry, it should have said: >>> dd if=/dev/da0 count=4 | hd >> >> 00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >> |................| >> * >> 000001b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff >> |................| >> 000001c0 ff ff ee ff ff ff 01 00 00 00 ff ff ff ff 00 00 >> |................| >> 000001d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >> |................| >> * >> 000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa >> |..............U.| >> 00000200 45 46 49 20 50 41 52 54 00 00 01 00 5c 00 00 00 |EFI >> PART....\...| >> 00000210 2d e8 5e 91 00 00 00 00 01 00 00 00 00 00 00 00 >> |-.^.............| >> 00000220 ff ff 3f d1 01 00 00 00 22 00 00 00 00 00 00 00 >> |..?.....".......| >> 00000230 de ff 3f d1 01 00 00 00 47 b5 79 82 96 d5 dc 11 >> |..?.....G.y.....| >> 00000240 be 97 00 0a e4 85 78 5e 02 00 00 00 00 00 00 00 >> |......x^........| >> 00000250 80 00 00 00 80 00 00 00 3e 0b 98 53 00 00 00 00 >> |........>..S....| >> 00000260 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >> |................| >> * >> 00000400 b6 7c 6e 51 cf 6e d6 11 8f f8 00 02 2d 09 71 2b >> |.|nQ.n......-.q+| >> 00000410 16 b6 79 82 96 d5 dc 11 be 97 00 0a e4 85 78 5e >> |..y...........x^| >> 00000420 22 00 00 00 00 00 00 00 de ff 3f d1 01 00 00 00 >> |".........?.....| >> 00000430 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >> |................| >> * >> 00000490 26 b6 79 82 96 d5 dc 11 be 97 00 0a e4 85 78 5e >> |&.y...........x^| >> 000004a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >> |................| >> * >> 00000510 37 b6 79 82 96 d5 dc 11 be 97 00 0a e4 85 78 5e >> |7.y...........x^| >> 00000520 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >> |................| >> * >> 00000590 48 b6 79 82 96 d5 dc 11 be 97 00 0a e4 85 78 5e >> |H.y...........x^| >> 000005a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >> |................| >> * >> 00000610 59 b6 79 82 96 d5 dc 11 be 97 00 0a e4 85 78 5e >> |Y.y...........x^| >> 00000620 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >> |................| >> * >> 00000690 6a b6 79 82 96 d5 dc 11 be 97 00 0a e4 85 78 5e >> |j.y...........x^| >> 000006a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >> |................| >> * >> 00000710 7a b6 79 82 96 d5 dc 11 be 97 00 0a e4 85 78 5e >> |z.y...........x^| >> 00000720 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >> |................| >> * >> 00000790 8b b6 79 82 96 d5 dc 11 be 97 00 0a e4 85 78 5e >> |..y...........x^| >> 000007a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >> |................| > > OK, there is the GPT signature which reads "EFI PART" at offset 0x200. > What was on the disk before? > I think it should look different. There is a document from sun which > explains the ZFS ondisk format and and I don't remember it to look > like a MBR and GPT ;) Sorry, I don't have the time right now to dig > through it.
Found it quickly. Here is the document: http://opensolaris.org/os/community/zfs/docs/ondiskformat0822.pdf See section 1.3.1. ZFS is not cleaning the first 8KB of the raw device so GEOM_PART will taste it and it looks like a broken GPT to it. For future constructions of zpool's one should zero the first few sectors of a device. For your specific I would make a tested backup and then zero the first 1KB of da0. But beware that it's dangerous! Don't blame me if you lose data or hair! _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
