27.02.2017 03:37, Vladimir 'phcoder' Serbinenko пишет: ... >>>>> This is not NT-style. NT uses partition offset. Who uses this format? >> Are >>>> >>>> This is used by util-linux and Linux kernel. >>>> >>>> >>>> * 6) PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF representing >> the >>>> * unique id of a partition if the partition table provides it. >>>> * The UUID may be either an EFI/GPT UUID, or refer to an MSDOS >>>> * partition using the format SSSSSSSS-PP, where SSSSSSSS is a >>>> zero- >>>> * filled hex representation of the 32-bit "NT disk signature", >>>> and PP >>>> * is a zero-filled hex representation of the 1-based partition >>>> number. >>>> >>>>> you sure that partition numbers are synced with user? Even in presence >> of >>>>> Solaris and bsd partitions. >>>>> >>>> >>>> It is not clear what we should return for nested partition. I'm not sure >>>> whether linux kernel scans nested partitions at all in which case we >>>> probably should follow the suite and assign PARTUUID to top-level >>>> partitions only. >>>> >>> Linux scans nested partitions and it uses though numeration in dev/sdaX, >> in >>> some cases shifting numbering of normal partitions. In those cases grub >> and >>> Linux numeration get out of sync >>> >> >> Can you provide example? > > Bsd and Solaris partitions. I remember we had problem with numbering of > those. >
Linux ignores nested BSD partitions (just tested). There are no special files created. Of course someone needs to test what happens under *BSD/Solaris in this case. I never liked idea of artificial partition GUIDs for MBR, but as long as only Linux is using them and we are consistent with its usage - so be it. >> I tried to create nested partition table, but >> Linux will not display it (actually attempt to "blockdev --rereadpt >> /dev/vda5" fails with "Invalid argument"). >> >> if (!disk_part_scan_enabled(disk) || bdev != bdev->bd_contains) >> return -EINVAL; >> >> Where bdev->bd_contains points to containing device for partition and to >> itself for the whole disk. >> >> As util-linux does not scan partition table itself, it does show these >> nested partitions either. >> _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
