On Tuesday 28 May 2019 19:52:02 Jonathan Billings wrote: > I suggest running 'blkid' and 'efibootmgr -v', and double-check that > the UUID for the CentOS boot entry matches the UUID of the EFI disk. > > You can delete and recreate the boot entry with 'efibootmgr', which > will likely solve the problem. > > It depends on the UEFI implementation, but when all the boot entries > are wrong (UUID changed due to new disk) sometimes it has a fallback > to find the Windows bootloader and choose it. > Thanks Jonathan. You're probably right about this as whever I try to do makes has effect. I've been looking in to efibootmgr to see what I need to do to get it working but so far with no luck. When I run it with -v I don't see any UUID details, nor can i see how I specify them. One thing I have noticed is that in the blkid output below everything refers to HD(2,...... Is that correct? Below is one of many attempts to set the values correctly. [root at gary ~]# efibootmgr -v BootCurrent: 0004 Timeout: 0 seconds BootOrder: 0002,3002,0000,0003,0004,0005,2001,2002,2003 Boot0000* Linux HD(2,GPT,14c4ac1d-abd8-4121-84ee-c05a825920de,0x145800,0x64000)/File(\EFI\centos\shim.efi) Boot0002* Windows Boot Manager HD(2,GPT,14c4ac1d-abd8-4121-84ee-c05a825920de,0x145800,0x64000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}.................... Boot0003* Fedora HD(2,GPT,14c4ac1d-abd8-4121-84ee-c05a825920de,0x145800,0x64000)/File(\EFI\fedora\shim.efi) Boot0004* CentOS Linux HD(2,GPT,14c4ac1d-abd8-4121-84ee-c05a825920de,0x145800,0x64000)/File(\EFI\centos\shim.efi) Boot0005* CentOS HD(2,GPT,14c4ac1d-abd8-4121-84ee-c05a825920de,0x145800,0x64000)/File(\EFI\centos\shimx64.efi) Boot2001* USB Drive (UEFI) RC Boot2002* Internal CD/DVD ROM Drive (UEFI) RC Boot3000* Internal Hard Disk or Solid State Disk RC Boot3002* Internal Hard Disk or Solid State Disk RC [root at gary ~]# efibootmgr -o 4,2001,2002,2 BootCurrent: 0004 Timeout: 0 seconds BootOrder: 0004,2001,2002,0002 Boot0000* Linux Boot0002* Windows Boot Manager Boot0003* Fedora Boot0004* CentOS Linux Boot0005* CentOS Boot2001* USB Drive (UEFI) Boot2002* Internal CD/DVD ROM Drive (UEFI) Boot3000* Internal Hard Disk or Solid State Disk Boot3002* Internal Hard Disk or Solid State Disk [root at gary ~]# efibootmgr -v BootCurrent: 0004 Timeout: 0 seconds BootOrder: 0004,2001,2002,0002 Boot0000* Linux HD(2,GPT,14c4ac1d-abd8-4121-84ee-c05a825920de,0x145800,0x64000)/File(\EFI\centos\shim.efi) Boot0002* Windows Boot Manager HD(2,GPT,14c4ac1d-abd8-4121-84ee-c05a825920de,0x145800,0x64000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}.................... Boot0003* Fedora HD(2,GPT,14c4ac1d-abd8-4121-84ee-c05a825920de,0x145800,0x64000)/File(\EFI\fedora\shim.efi) Boot0004* CentOS Linux HD(2,GPT,14c4ac1d-abd8-4121-84ee-c05a825920de,0x145800,0x64000)/File(\EFI\centos\shim.efi) Boot0005* CentOS HD(2,GPT,14c4ac1d-abd8-4121-84ee-c05a825920de,0x145800,0x64000)/File(\EFI\centos\shimx64.efi) Boot2001* USB Drive (UEFI) RC Boot2002* Internal CD/DVD ROM Drive (UEFI) RC Boot3000* Internal Hard Disk or Solid State Disk RC Boot3002* Internal Hard Disk or Solid State Disk RC [root at gary ~]# blkid /dev/mapper/centos-root: UUID="08c18076-37b4-4f65-b550-e2633ac24d5d" TYPE="xfs" /dev/sda6: UUID="ifEKlz-O4SM-NevI-X4TQ-lQg2-0lAN-Jb7cZQ" TYPE="LVM2_member" PARTUUID="97e93e7c-a6cf-4532-8f7d-5c0e50987350" /dev/sda1: LABEL="WINRE" UUID="8262E42362E41DA3" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="277e20d2-ee46-412b-babb-9b2249324ca4" /dev/sda2: SEC_TYPE="msdos" UUID="1437-B8F4" TYPE="vfat" PARTLABEL="EFI System Partition" PARTUUID="14c4ac1d-abd8-4121-84ee-c05a825920de" /dev/sda3: LABEL="Windows" UUID="1098EFF798EFD96C" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="f7cefd8f-73e7-4956-bb96-0c03ea21bff9" /dev/sda4: UUID="12DC737EDC735B45" TYPE="ntfs" PARTUUID="95f8994c-a8ad-48f5-9fbb-eda67c56f6e3" /dev/sda5: UUID="de45b7f8-d072-4f7e-b9be-a62428db3fbb" TYPE="xfs" PARTUUID="8c00cc67-1063-4889-bdce-6f6259ba1491" /dev/sda8: LABEL="RECOVERY" UUID="74CCE22FCCE1EAF6" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="7c95ff6d-d945-4479-9100-f66aa81a403e" /dev/mapper/centos-swap: UUID="30ca7d38-a0df-4473-a1d0-dc7a1fd41458" TYPE="swap" /dev/mapper/centos-home: UUID="abcedda1-b69b-441e-bced-23a66b2b85f6" TYPE="xfs" [root at gary ~]# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/centos-root 52403200 7424692 44978508 15% / devtmpfs 6016292 0 6016292 0% /dev tmpfs 6034084 0 6034084 0% /dev/shm tmpfs 6034084 9820 6024264 1% /run tmpfs 6034084 0 6034084 0% /sys/fs/cgroup /dev/sda5 1038336 229176 809160 23% /boot /dev/sda2 204576 85252 119324 42% /boot/efi /dev/mapper/centos-home 688017172 428947768 259069404 63% /home tmpfs 1206820 8 1206812 1% /run/user/42 tmpfs 1206820 0 1206820 0% /run/user/0 [root at gary ~]#