On Sun, 5 Oct 2014, Patrik Horník wrote:
I want to ask for best solution for replacing device in RAID 6 array. - We discussed couple of years ago hot replacing the drive. I see it is now supported in mdadm. Is it rock stable and can be used on production data? I have kernel and mdadm from debian testing, 3.14-2 and 3.3-2. Were there some important fixes from these versions? I have this server on UPS but not on aggregator so there is real danger of power outage and need to shutdown the array during operation.
I have successfully used the replace function without ill effects, and I believe this was with a 3.8.x kernel. The function itself has been around since 3.3 or so.
I don't want to give you any recommendations, but next time I need to replace a failing drive that is still operational enough to stay in the raid, personally I will use the replace function. The code is a few years old by now and I imagine it has been used quite a lot by now.
-- Mikael Abrahamsson email: swmike@xxxxxxxxx
