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How to start a RAID1 with a single disk? (Preferably via YAST)

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Hello everyone


I'm currently fiddling around with creating a home-server, to replace my aging Synology Diskstation setup. Having run several Synology's over the past 7 years, I've finally gotten around to wanting to ditch the Synology's, and the limitations imposed by their hardware/software.

Therefore I've tried assembling a (relatively) low-wattage system, based on an i3-3250T, and a ASUS P8P67 Deluxe motherboard (which I raided from my desktop).

I've thrown it into a case which has 4 hot-swap-bays, for the data-drives I'm about to run in the server. The main drive is being backed-up to an external drive, as well as the most important config-files/docs etc. are being backed up to an offsite backup.


My question comes from my desire to migrate the data from my Synology DS209, currently running a RAID1 with 2 3TB-drives (WD & Seagate) to my new home server.

I could just move the drives directly to the servers hot-swap-bays, and openSUSE would recognize it, and be able to use it. (Did that with an even older 207, which I then proceeded to wiping and create a clean SW RAID1)

Synology however formats the drives with 3 partitions (/, /tmp? & data). And the RAID1 from the DS209 is even Ext3, and I'd like to upgrade that to Ext4.

I do not however, have enough free space to make a complete duplicate of all data on the drives, and I'm therefore looking for a way to start the RAID1 with 1 drive.
I'll yank the drive from the DS209, insert it to the new server, format and prep it for becoming one half of the RAID1 in the server.

Then I'm hoping to copy all the data from the DS209 to the new server's (50%) RAID1. Then when this is done, yank the last drive, and plug it into the server, and then hopefully build/sync a complete software RAID1 from the 3TB-drive in the server.

I'm of course well aware that this is a risky operation, as there will only be one drive with the data, until the copy&rebuild (sync) is completed, but not having much other choice at the moment, this is what I'm looking for.


I don't however, see an option like that in YAST Partition Manager.
It's doable, and rather painless, through the Diskstation Manage webinterface (DSM) the DS209 (& the 207), and actually how I build the RAID1 there in the first place.

Does anyone have any good ideas, or did I loose everyone, after the third line? ;)


Regards

/Bawl

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