Are there differences in the way CentOS 6.0 handles md raid1 arrays compared to earlier versions? After getting my drive with 4k sectors partitioned with a 64-sector starting offset and working under 5.6 with about a 20Mb/sec sync rate, I booted with the 6.0 livecd to see if there would be any improvement, but instead of autodetecting the pairing, it assembled each partition into its own md device with missing members. And the sync of the drive with the 4k sectors would only go at about 4Mb/sec (regardless of what I put in /proc/sys/dev/raid/speed_limit_min and _max).
What was worse was that booting back to 5.6 left most of the raid pairs broken, some still having numbers in the md120 range, and one of the drives with an unrecognizable partition table. I think I can repair everything, but did I miss something about this in release notes somewhere?