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{{Warning box|Grub is unable to install itself on an empty disk or empty partitions; to have the spare fully working and booting after a sync the boot partition on the spare drive needs to be duplicated:}}
{{Warning box|Grub is unable to install itself on an empty disk or empty partitions; to have the spare fully working and booting after a sync the boot partition on the spare drive needs to be duplicated:}}
{{Warning box|as the dd command is named "data destroyer" you need to be extremely prudent and don't make a mistake on the name of source partition or destination. In first you should skip the dd command and try directly the second with grub. If the grub can be installed without dd, forget it.}}
to copy boot partition (sda=disk of the array sdc=the spare)
to copy boot partition (sda=disk of the array sdc=the spare)
Last of all, try forcing a failure of one of the original two drives and ensure that the server boots, and the RAID rebuilds corectly. You may then have to repeat this exercise to get the drives in the correct order (i.e sda/sdb in the array with sdc as the spare)
Last of all, try forcing a failure of one of the original two drives and ensure that the server boots, and the RAID rebuilds corectly. You may then have to repeat this exercise to get the drives in the correct order (i.e sda/sdb in the array with sdc as the spare)
====Reusing Hard Drives====
====Reusing Hard Drives====
