c/ubuntuserver · by Haui@discuss.tchncs.de · 3y

Change current ssd to raid1

Hi there, I just ordered a second (similar) ssd to the one I have. Not a boot drive. Once it arrives, I'd like to put it in raid 1 with my current drive. The current drive is not empty (but I could back it up if necessary).

I have used mdadm in the past but never with a drive that is actually in production use. Which steps would you suggest?

Have a good one!

1 points · 6 comments · view on lemmy.world

6 Comments

recycledbits@discuss.tchncs.de · 3 pts · 3y (2 replies)

What I usually do:

create degraded raid1 with the new disk only
copy the files over
adjust fstab if needed
wipe the old disk and add it to the raid
wait for the kernel to resync it

recycledbits@discuss.tchncs.de · 1 pts · 3y

Dreizonk@discuss.tchncs.de · 1 pts · 3y

Sounds absolutely legit to me. Aside this, a backup will never hurt.

Goodman@discuss.tchncs.de · 1 pts · 3y (1 reply)

I am not an expert, so take my advice with a grain of salt. I'm just a random person on the internet and it's your data.

First I'd make a backup like you said. Then setup the RAID 1 device as usual and then transfer the data from your backup back onto the raid device. Because I believe that if you create a raid device you have to make a new filesystem. Don't quote me on that though.

Hope that helps

Haui@discuss.tchncs.de · 1 pts · 3y

Thank you very much! I figured that this would be a way to do it but hoped someone would say: dude! Its a lot easier than that! Try this! :D well, no such luck so far. Lets see. Gonna try it sometime this week. Will update.