2009/4/25 dnk <d.k.emaillists@gmail.com>
Hi there, I have a system with the following:
<snip>
Disk /dev/md0: 1000.2 GB, 1000202174464 bytes
2 heads, 4 sectors/track, 244189984 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk /dev/md0 doesn't contain a valid partition table
Now I just added a new hard drive (sdc).
I was wondering how to go about (if possible) to add this drive to my
existing partitions with LVM.
Now I never setup this system (Another person had), and if i am
reading the above right, it appears as though they did not use LVM for
the raid.
The system has the OS on a standalone drive, the home folder is on the
two raided drives. I was hoping to extend my home folder to take
advantage of my new drive.
Recommendations?
It should be possible to extend your raid1 to a third drive pretty easily which would give you an extra 500GB of space...
You'll probably want to look at mdadm using grow to take the array up to 3 drives and manage to add the new disk and once you're done extending the array, you'll likely want to look at resize2fs to extend the filesystem to use the extra space...
If you wanted to get a whole extra TB of space rather than just 500GB, it would be a bit more complex, the simplest solution I can think of right now would be something along the lines of backing up the existing home folder to the new drive, destroying the existing array then creating a new degraded raid5 array across the two old disks, restoring the home folder back to the new array before adding the new disk into the array...
Of course... backups recommended before doing this...
d