I've tested it and it worked fine for me. But taking a backup is highly recommended.
The trick is not to use mdadm, since growing with mdadm is not possible at the moment. Use raid-tools instead.
The program raidreconf comes along with raidtools. This prog takes two raid-tab files as input which describe the array configuration before and after reconfiguration. (See man raidreconf for further details)
I've testet growing an array of 3 disks to 4 disks. Having LVM2 grow its volume group along with the raid was another (very tricky) thing...
Greetings, Frank
John Poirier wrote:
Greets,
A lot of RAID 5 hardware controllers can grow a RAID 5 array (online capacity expansion). Will this be available in software RAID?
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