28.02.2017 17:08, Vladimir 'phcoder' Serbinenko пишет: >> >> OK I see, kernel skips BSD partition marked as "unused". >> >> So it appears that kernel always puts special nested partitions after >> normal logical MSDOS partitions, so it will not skew MSDOS partition >> numbers. >> >> [ 1.529752] vda: vda1 vda2 vda3 < vda5 vda6 > >> vda2: <openbsd: vda7 > >> >> >> /* >> * Look for partitions in two passes: >> * First find the primary and DOS-type extended partitions. >> * On the second pass look inside *BSD, Unixware and Solaris >> partitions. >> */ >> >> For such partition (vda7) PARTUUID is empty. >> >> P.S. I wonder whether we correctly map such partition ... no, we do not. >> >> 10:~ # cat /tmp/foo >> (hd0) /dev/vda >> 10:~ # grub2-probe -m /tmp/foo -t compatibility_hint -d /dev/vda2 >> hd0,msdos2 >> 10:~ # grub2-probe -m /tmp/foo -t compatibility_hint -d /dev/vda5 >> hd0,msdos5 >> 10:~ # grub2-probe -m /tmp/foo -t compatibility_hint -d /dev/vda7 >> hd0,msdos2 >> > WAI. In case when subpartition starts at the same sector as partition > itself. >
Sorry? vda7 is 256M, how can you suddenly pretend it is 2G? 10:~ # fdisk -l /dev/vda Disk /dev/vda: 5 GiB, 5368709120 bytes, 10485760 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x882b18da Device Boot Start End Sectors Size Id Type /dev/vda1 2048 2099199 2097152 1G 83 Linux /dev/vda2 2099200 6293503 4194304 2G a6 OpenBSD /dev/vda3 6293504 10485759 4192256 2G 5 Extended /dev/vda5 6295552 6819839 524288 256M 83 Linux /dev/vda6 6821888 7346175 524288 256M 83 Linux 10:~ # fdisk -l /dev/vda2 Disk /dev/vda2: 2 GiB, 2147483648 bytes, 4194304 sectors Geometry: 16 heads, 63 sectors/track, 10402 cylinders Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: bsd Slice Start End Sectors Size Type Fsize Bsize Cpg a 2099200 2623488 524289 256M boot 0 0 0 b 2099200 2623488 524289 256M unused 0 0 0 c 2099200 6293503 4194304 2G unused 0 0 0 d 0 10485215 10485216 5G unused 0 0 0 Partition table entries are not in disk order. _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
