replacing the missing disk (mdadm --add /dev/md0 /dev/sdb1) and waiting for sync to complete leads to proper booting system
the system continued boot even after I --failed and --removed the second disk.
I could not return the system to it's original boot fail state until I zero'd the super block on the second disk.
some additional messages that I had not seen before (after boot is failing again)
device-mapper: table: 252:0: linear: dm-linear: Device lookup failed
device-mapper: ioctl: error adding target to table
device-mapper: table: 252:1: linear: dm-linear: Device lookup failed
device-mapper: ioctl: error adding target to table
(then repeats the above once more)
here is an interesting find:
replacing the missing disk (mdadm --add /dev/md0 /dev/sdb1) and waiting for sync to complete leads to proper booting system
the system continued boot even after I --failed and --removed the second disk.
I could not return the system to it's original boot fail state until I zero'd the super block on the second disk.
some additional messages that I had not seen before (after boot is failing again)
device-mapper: table: 252:0: linear: dm-linear: Device lookup failed
device-mapper: ioctl: error adding target to table
device-mapper: table: 252:1: linear: dm-linear: Device lookup failed
device-mapper: ioctl: error adding target to table
(then repeats the above once more)