On Fri, Apr 29, 2016 at 1:56 AM, Benton Lam <[email protected]> wrote: > Hi, > > I currently have a 5.7 box, with 2 disk RAID1 (comprise of sd1a and sd2a) > > Suppose I upgrade / install to 5.9. Is it possible for me to do the following: > > bioctl -O /dev/sd2a sd3 # degrade the raid1 (sd3) > bioctl -c 5 -l /dev/sd1a,/dev/sd2a,/dev/sd4a -O /dev/sd1a softraid0 #
This will not run IMHO. sd1a is still in use by sd3. Also the format of command is IMHO incorrect. i.e. combination of -c and -O > create a raid 5 with sd1a, sd2a and sd4a, but sd1a is degraded, sd1a is not degraded, what's degraded is sd3 (based on your description). Also for creation of RAID5 you need minimally 4 drives. > suppose that creates sd5 > > <copy stuff from RAID1 to RAID5> > bioctl -d sd3 > bioctl -R /dev/sd1a sd5 # swap the sd1a back into the raid5 > > Is that possible? or should I be finding another 3TB drive, copy the > stuff onto that temporary drive and create the RAID5? IMHO your way is not possible, but I write it just based on my user experience with softraid, I've not tested what you write here. I guess this is more up to you. Anyway, finding another 3TB drive sounds like way more safer way so I would really recommend it.
