Just rebuilt a C6 box last week as C7. Four drives, and sda and sdb for root, with RAID-1 and luks encryption.
Layout: lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 931.5G 0 disk ├─sda1 8:1 0 200M 0 part /boot/efi ├─sda2 8:2 0 1G 0 part /boot ├─sda3 8:3 0 500.1G 0 part │ └─md127 9:127 0 500G 0 raid1 │ └─luks-5e007234-cd4c-47c6-b305-734f353a4405 253:0 0 500G 0 crypt / ├─sda4 8:4 0 4G 0 part │ └─md126 9:126 0 4G 0 raid1 │ └─luks-9dd9aacc-e702-43d9-97c2-e7e954619886 253:1 0 4G 0 crypt [SWAP] └─sda5 8:5 0 426.2G 0 part └─md125 9:125 0 426.1G 0 raid1 sdb 8:16 0 931.5G 0 disk ├─sdb1 8:17 0 500.1G 0 part │ └─md127 9:127 0 500G 0 raid1 │ └─luks-5e007234-cd4c-47c6-b305-734f353a4405 253:0 0 500G 0 crypt / ├─sdb2 8:18 0 4G 0 part │ └─md126 9:126 0 4G 0 raid1 │ └─luks-9dd9aacc-e702-43d9-97c2-e7e954619886 253:1 0 4G 0 crypt [SWAP] └─sdb3 8:19 0 426.2G 0 part └─md125 9:125 0 426.1G 0 raid1
The problem is md125. System gagged on bringing it up when I rebooted, until I commented it out of fstab.
Now, cryptsetup gives me the same UUID as I have in /etc/mdadm.conf. The entry in /etc/crypttab looks identical to the RAIDs for root and swap, but nope.
I was able to d an mdadm --assemble -u $(UUID from mdadm.conf), and then a cryptopen luks... but never got anything in /dev/mapper.
I'm still fighting - any thoughts? (No, I can't reboot again, like I did this morning, it's now serving four important home directories from another pair of drives with RAID 1.)
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