Hello, I have a 2-device RAID0 with mdadm. I would like to replace one disk with a new one, while keeping the array online. I expected I would be able to do --add, then --replace, which would copy all the stripes from one member to the new spare, then switch the old member status to faulty, as can be done with other RAID types. But apparently even --add is not supported for RAID0: # mdadm --add /dev/md0 /dev/sdm3 mdadm: add new device failed for /dev/sdm3 as 2: Invalid argument [76424.968457] md0: personality does not support diskops! [76424.974941] md0: personality does not support diskops! [76424.983688] md0: personality does not support diskops! Is there any fundamental reason why this is not supported? If not, then please count this as a feature request to implement, if possible. Thanks -- With respect, Roman
