Imre, your suggestion worked. I zeroed the first several MB of the disk and performed the mdadm --zero-superblock as recommended by ceg in bug #527401. I did the install the same, except I manually created the partition and did not create swap.
I then tried installing on RAID1 again, the only difference being the addition of a swap partition. All other options were the same as the single drive install. It fails with the "Invalid Argument" error. :(
Imre, your suggestion worked. I zeroed the first several MB of the disk and performed the mdadm --zero-superblock as recommended by ceg in bug #527401. I did the install the same, except I manually created the partition and did not create swap.
I then tried installing on RAID1 again, the only difference being the addition of a swap partition. All other options were the same as the single drive install. It fails with the "Invalid Argument" error. :(
I'll try again with no swap partition.