At Mon, 28 May 2018 20:49:54 -0700 CentOS mailing list centos@centos.org wrote:
On 05/28/2018 06:20 PM, Robert Heller wrote:
The UUID in the BIOS is NOT VFAT volume. It is something completely different. I have no clue what it is -- it does not correspond to anything I can find.
It should be the UUID of the partition, not of the VFAT volume. The partition UUID is stored in the GPT. The volume UUID is stored in the filesystem header (I believe).
For example, on my laptop:
# efibootmgr -v | grep Fedora Boot0000* Fedora PciRoot(0x0)/Pci(0x17,0x0)/Sata(2,65535,0)/HD(1,GPT,39484dd8-b1d9-47b2-b4d7-89dfe3ce5e09,0x800,0x12c000)/File(\EFI\fedora\shimx64.efi)
# blkid | grep sda1 /dev/sda1: LABEL="ESP" UUID="3850-574E" TYPE="vfat" PARTLABEL="EFI System Partition" PARTUUID="39484dd8-b1d9-47b2-b4d7-89dfe3ce5e09"
# sgdisk -i1 /dev/sda Partition GUID code: C12A7328-F81F-11D2-BA4B-00A0C93EC93B (EFI System) Partition unique GUID: 39484DD8-B1D9-47B2-B4D7-89DFE3CE5E09 First sector: 2048 (at 1024.0 KiB) Last sector: 1230847 (at 601.0 MiB) Partition size: 1228800 sectors (600.0 MiB) Attribute flags: 0000000000000000 Partition name: 'EFI System Partition'
Well, on my system:
newserver.wendellfreelibrary.org% sudo blkid /dev/sda1 /dev/sda1: SEC_TYPE="msdos" UUID="8D81-8D0C" TYPE="vfat" newserver.wendellfreelibrary.org% sudo blkid /dev/sdb1 /dev/sdb1: SEC_TYPE="msdos" UUID="8D81-8D0C" TYPE="vfat"
That UUID is the VFAT partition (I dd'ed the partition from the old disk (/dev/sdb1) to the new disk (/dev/sda1)
And:
newserver.wendellfreelibrary.org% sudo sgdisk -i1 /dev/sda Partition GUID code: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (Microsoft basic data) Partition unique GUID: BD7AFF34-3303-4D58-92C2-0BB938D467CB First sector: 2048 (at 1024.0 KiB) Last sector: 497663 (at 243.0 MiB) Partition size: 495616 sectors (242.0 MiB) Attribute flags: 0000000000000000 Partition name: 'primary'
newserver.wendellfreelibrary.org% sudo sgdisk -i1 /dev/sdb Partition GUID code: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (Microsoft basic data) Partition unique GUID: 7B6AD1F7-DA76-40F0-94C8-6196CCDD47E5 First sector: 2048 (at 1024.0 KiB) Last sector: 497663 (at 243.0 MiB) Partition size: 495616 sectors (242.0 MiB) Attribute flags: 0000000000000000 Partition name: 'primary'
The UUID in the EFI boot options is 99E275E7-75A0-4B37-A2E6-C5385E600CB, which does not to match anything, but the system is only happy booting the old disk...
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