SAS ATA Upper Layers 3Gb/s SAS » Tutorials SAS ATA Upper Layers– 228 BK Covers basic ATA architecture, the ATA task file, ATA commands, Serial ATA frames, and compares ATAPI (ATA Packet Interface) vs. native SCSI. Posted on April 14, 2011 by Editor - Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.