How to Set up GRUB to boot from both disks of mirrored RAID
On Linux software RAID 1, GRUB normally boots from the primary disk. Configure it on the secondary disk too so the system can boot if the primary fails.
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RAID 1.
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Decrease the time for rebuilding the RAID 1 array
To reduce RAID 1 rebuild time, use: # mdadm -C /dev/md0 -l1 -n2 /dev/sda1 /dev/sda2 --bitmap=internal. --bitmap (Write-intent bitmap) reduces synchronization time…