Yup. Tried it out. It's not going to work :( Guess i'll just back up what I really need onto a different drive, and nuke the drives and go from there.
Thanks Karel and Kamil for the help :) On Fri, Apr 29, 2016 at 7:52 AM, Benton Lam <[email protected]> wrote: > Thanks Kamil. Good call on the using qemu to try this out somewhere safer. > > > On Fri, Apr 29, 2016, 04:13 Kamil Cholewiński <[email protected]> wrote: >> >> On Fri, 29 Apr 2016, 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 # >> > create a raid 5 with sd1a, sd2a and sd4a, but sd1a is degraded, >> > 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? >> > >> > Thanks, >> > Benton Lam >> >> 1. Try it in Qemu. Really, nothing like a playground where you can try >> things without unnecessary risk. I run my lab like this: >> >> > #!/bin/sh >> > exec qemu-system-x86_64 -m 512 -no-fd-bootchk \ >> > -device virtio-net,netdev=mynet0 -netdev user,id=mynet0 \ >> > -cpu host -enable-kvm \ >> > -serial mon:stdio \ >> > -drive if=virtio,index=0,file=$HOME/vm/raidlab-0.img \ >> > -drive if=virtio,index=1,file=$HOME/vm/raidlab-1.img \ >> > -drive if=virtio,index=2,file=$HOME/vm/raidlab-2.img \ >> > ... [ continue adding drives here ] ... \ >> > -cdrom ~/iso/OpenBSD/amd64/install59.iso \ >> > $@ >> >> To get more disks, dd if=/dev/zero of=raidlab-$i.img bs=1M count=1024 >> >> The host is on Linux, but I think you only need to drop the kvm flag for >> other host OS's to work. >> >> You need -boot d to start from CD, and -nographic to use your terminal >> as the console after installation. You may also want to add: >> >> /etc/boot.conf: >> > set tty com0 >> > stty com0 115200 >> /etc/ttys: >> > tty00 "/usr/libexec/getty std.115200" vt220 on secure >> >> 2. For live data, if you care about it at all, this sounds like a really >> bad idea. Ensure you have good backups before you do anything >> destructive. Consider whether another drive's cost really means more to >> you than your data. You can keep the extra drives as spares for later. >> Better safe than sorry. >> >> K.
