Gene Heskett wrote: > The man page we have goes on and on for megabytes without ever giving an > example. > > I thought maybe it could scan for devices so that I could build an > mdadm.conf but it wont do a --scan by itself.
You are looking for mdadm --detail --scan It is in that man page, as an example under --detail. > But I don't see an option (or recognize it if it is there) to give it a > controller id and let it make a raid10 out of the 4 identical drives it > could find there. > > If there is such a critter, point me at it please. You have to feed mdadm the drives you want specifically; there's no scattershot approach. Let's say that the drives are /dev/sdf, /dev/sdg, /dev/sdh and /dev/sdi. (You can re-confirm what drive is what via hdparm -i, or smartctl.) If you have data on them, it will be wiped out. You should copy off anything important, and then run wipefs on each of them. Then, creation is # mdadm -C /dev/md0 --level=10 --raid-devices=4 /dev/sdf /dev/sdg /dev/sdh /dev/sdi (assuming you want it named /dev/md0 and there isn't one already) Then you can make a filesystem on /dev/md0 and put it in your fstab, mount it, and copy data over to it. > What I'd like to do when I install bullseye, is use this raid10 for > the /home partition in the bullseye install. The installer will recognize it as an md RAID and can be told that you want to use it as-is, or you can destroy it and re-create it without data. -dsr-
