An alternative is to use the --size option of mdadm to make the array
slightly smaller than the smallest drive.  

timtowtdi, as usual

quoted

quoted

However as you should be listing the uuids in /etc/mdadm.conf, any

Umm... yeah, should I?

What else would you use to uniquely identify the arrays?  Not device
names I hope.

Right now all that's in mdadm.conf is:

DEVICE /dev/sd[abcd]1
ARRAY /dev/md0 devices=/dev/sda1,/dev/sdb1,/dev/sdc1,/dev/sdd1
MAILADDR root@localhost

Something important missing..?

quoted

Should get me some sedatives for the day when this all explodes :P

Just make sure it happens on your day off, then someone else will
need the sedatives :-)

Yeah, the landlord.

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