How fast are they going (sata drives) connected to controller x:
# dmesg | grep -i sata | grep 'link up' [ 1.210000] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 1.210001] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 1.210002] ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 1.210003] ata6: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [ 1.210004] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
Ruh-roh. Looks like ata6 is the slow one in the bunch.
That is ok if it is a sata cd rom drive... Don't want to have the cd fly out and decapitate anybody.