Les Mikesell wrote: > On Tue, Dec 6, 2011 at 1:46 PM, <m.roth at 5-cent.us> wrote: >> >> Booting purposes is the point: /dev/md0 is /boot. And as the slot's >> ATA0, it should come up as sda. You mention getting the bootloader >> sectors over - do you mean, after it's rebuilt and active, to then >> rerun grub-install? Remember, the drive that's failing is /dev/sda. I >> also don't see why, if I replace the original drive in the original >> slot (I'm doing this on the clone, whose drive is just fine, >> thankyouveddymuch), it isn't recognized as /dev/sda. > > Booting software RAID1 is kind of an oddball case. You actually boot > on the disk that bios considers your boot drive only, and it works > because the drives are mirrored and happen to look the same whether > you look at the partition or the raid device. You need to install > grub separately onto each disk of the pair, though. If you get this > part wrong, you can boot from an install/rescue disk and fix it. > Ack! So I actually need to run grub-install, and do it for both; didn't know that (always had /boot as a plain vanilla primary partition)?! Thanks, Les.