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.)
mark
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