On Tue, Feb 17, 2015 at 3:58 PM, Digimer <[email protected]> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > First, you should have backups. Why not get an external USB drive? You > can get those quite inexpensive. Heck, even a 64GB thumb drive > shouldn't be too expensive, though flash is not the most reliable. >
I have about 45 GB on the array at present. I had decided to use Blu-ray discs for backup when I bought the system. There is no easy to back up method. (I'm no rsync expert!! just a noob.) > > No matter what, I would start with a good backup. Playing with mdadm > is relatively safe, but if it's your first time playing with it, you > can get yourself into trouble. > > Hardware RAID controllers often auto-use replacement drives to rebuild > a degraded array, but mdadm does not. How exactly you go about > repairing the array depends on your specific configuration and which > drive failed. You will need to start by partitioning the replacement > drive such that it matches the existing drives (each array has to have > a partition equal to or larger than the same partitions on the other > drives). > > Once partitioned (and rebooted, if needed), you will add the new > partition to the degraded array. Once added, mdadm will start > re-assembling the array. Note that if one of the arrays has /boot, > you'll probably need to run grub's install on the raw disk so that it > can be booted from. > I have a separate drive for systems. The array is for storage. So partitioning the drive is necessary. OK - - - I hadn't thought of that! > > The command to add the new partition to an existing array will look > something like this: > > mdadm --manage /dev/md0 --add /dev/sda1 > > Obviously, the 'mdX' and 'sdYZ' will need to be adjusted for your > configuration. > You have helped me start the process! D
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