mdadm create raid10 array with only 2 drives

mdadm --create /dev/md1 --level 10 --raid-devices=2 /dev/sdb2 /dev/sdc2 --layout=f2 --metadata=0.90

Note that layout=f2 or layout=n2 is very important as without it you'll get a complaint like this:

mdadm --create /dev/md0 --level 10 --raid-devices /dev/sdb1 /dev/sdc1 missing missing
mdadm: invalid number of raid devices: /dev/sdb1

It is basically more like a proper/hardware based RAID 1 where you see read speeds of both drives as one.

Eg. 90MB/s drives will yield about 180-190MB/s read speeds.

 


Tags:

mdadm, raid, array, drivesmdadm, dev, md, devices, sdb, sdc, layout, metadata, ll, complaint, invalid, hardware, speeds, eg, mb, yield,

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