Andrew, You asked me to test if the issues I reported (Re: JMicron 20360/20363 AHCI Controller much slower with 2.6.18 / Re: SATA CD/DVDRW Support in 2.6.18? / Re: Problems with Samsung SH-W163A SATA CD/DVDRW JMicron 20360/20363 2.6.18.1) were still present with 2.6.19-rc5, I tried it today and ran into a very strange problem, the 4 400gb Samsung SATA HDs connected to ata_piix were detected as normal but the raid that they belong to failed to start, the raid system couldnt find any superblock at all. Is it possible that the addressing of the sectors has changed such that the device data structure does not map to the on disk data in the same way as it did with 2.6.18.x ? unfortunately they drives are not partitioned, just added straight to the raid, otherwise checking the partition table would be a good test. I had a idea about taking a copy of a few kbs of data from each drive using both kernel versions and comparing them, but if the raid is started under 2.6.18 its possible the data would change anyway.. so I dont think that would work. Any suggestions? I really want to complete testing of the two issues I reported.. Thanks Andy - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html