Abstract: A disk drive carrier assembly for carrying plural disk drives is provided. The assembly has a casing having first and second opposed ends, opposed sides, a top and a bottom. Drive cards are provided in the casing. Each drive card has a disk drive receiving portion for receiving a disk drive and provides at least one of a power and a data connection to a disk drive. A baffle arrangement splits an air stream entering the casing at a first end of the casing to flow over the disk drive receiving portion of each of the drive cards. The drive cards and the baffle arrangement are arranged so that air flows only in parallel over the disk drive receiving portion of each of the drive cards. In this way, each disk drive receiving portion receives air that has not passed over another disk drive receiving portion of the assembly.