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Is it possible to introduce in a RAID 1 setup a larger drive using its free space for further uses?

E.g:

What we have:

sda - 250 GB HD
 |-- sda1 - /boot
 |-- sda2 - /

sdb - 500 GB HD
 |-- sdb1 - /boot
 |-- sdb2 - /
 |-- sdb3 - whatever

md - RAID1 setup
 |-- md0 - /boot - sd[ab]1
 |-- md1 - / - sd[ab]2

In this case we could use sdb3 for something else. Is this possible? I've never set up a software RAID and this struck my mind.

5

Yes, sdb3 is available for you to use as you wish.

In your example the MD devices would probably be md0 and md1 rather than md0p1 and md0p2.

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