Quite cheap.
Now there is a chance that these keys will also work on the M5014/5015 cards to enable RAID6 and SED.
I got a M5000 Adv feature key that happily works on the M1015, so it may work the other way too.
DON'T hold me to it
http://www.ebay.com/itm/New-IBM-M10...sk_Controllers_RAID_Cards&hash=item19d78c6a9c
http://www.ebay.com/itm/New-IBM-M10...sk_Controllers_RAID_Cards&hash=item484dc92b4d
http://www.ebay.com/itm/New-IBM-M10...sk_Controllers_RAID_Cards&hash=item3ccd7689a8
Now there is a chance that these keys will also work on the M5014/5015 cards to enable RAID6 and SED.
I got a M5000 Adv feature key that happily works on the M1015, so it may work the other way too.
DON'T hold me to it
http://www.ebay.com/itm/New-IBM-M10...sk_Controllers_RAID_Cards&hash=item19d78c6a9c
http://www.ebay.com/itm/New-IBM-M10...sk_Controllers_RAID_Cards&hash=item484dc92b4d
http://www.ebay.com/itm/New-IBM-M10...sk_Controllers_RAID_Cards&hash=item3ccd7689a8