Yeah, I'm not a fan of EFI because:Both sda and sdb are currently identical. / is /dev/md125 which is sda3 and sdb3 /boot is /dev/md126 which is sda4 and sdb4 /boot/efi is only on /dev/sda1and IIUC, can't be raided which means you have to remember to sync /dev/sda1 to /dev/sdb1 after anything that updates /dev/sda1. And if you could raid /boot, I don't see a need for it to be a separate partition. My /boot is on /. I just buy a couple of 2TB (or less) disks where / and swap sit and boot legacy BIOS. If I need more storage, I'll get a couple of 4TB (or larger) disks and partition them: [0:root@elmo vhosts 2]$ fdisk -l /dev/sdc Disk /dev/sdc: 3.7 TiB, 4000787030016 bytes, 7814037168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disklabel type: gpt Disk identifier: 72FCBBCF-6AA6-47F4-8A99-965F773B35CB Device Start End Sectors Size Type /dev/sdc1 2048 31250431 31248384 14.9G Microsoft basic data /dev/sdc2 31250432 7814035455 7782785024 3.6T Microsoft basic data ... and what's with this 'Microsoft basic data' stuff. /dev/sdc1 is swap and /dev/sdc2 is ext4. I guess I woke up grumpy this morning. :-) Bill On 3/16/2018 5:55 AM, Gary Stainburn
wrote:
On Thursday 15 March 2018 16:34:26 Bill Shirley wrote:Run: grub2-install /dev/sda grub2-install /dev/sdb Now, you can boot from either drive. BillHi Bill, Thanks for this. However, when I try this I get: [root@lou ~]# grub2-install /dev/sda /usr/lib/grub/x86_64-efi doesn't exist. Please specify --target or --directory [root@lou ~]# A quick google shows gives the indication that this is for MBR systems where mine is UEFI. A slower google hasn't given me instructions on how to do this on a UEFI system in a way that I can understand. Can anyone give the equivelant to Bill's commands above. To review the situation. I have sda which I boot from. I have a brand new sdb which I use for RAID1. Should sda fail at some point I want to be able to unplug sda, and be able to boot from (what is currently) sdb. this is what the two drives both look like at the moment, [root@lou ~]# parted GNU Parted 3.1 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) print Model: ATA ST3000DM001-1CH1 (scsi) Disk /dev/sda: 3001GB Sector size (logical/physical): 512B/4096B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1049kB 53.5MB 52.4MB fat16 EFI System Partition boot 2 53.5MB 2837GB 2837GB raid 3 2837GB 2942GB 105GB raid 4 2942GB 2994GB 52.5GB ext4 raid 5 2994GB 3001GB 6296MB raid 6 3001GB 3001GB 1049kB bios_grub (parted) _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx |
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