On Wed, May 6, 2009 at 4:47 PM, Randall R Schulz <rschulz@sonic.net> wrote:
On Wednesday May 6 2009, Larry Stotler wrote:
On Wed, May 6, 2009 at 2:18 PM, Randall R Schulz wrote:
...
However, whether a drive is connected by SATA, eSATA, USB, FireWire, SCSI, SAS or IDE / ATA, it is still and equally "directly" connected.
Not if there is some other problem.
I guess I don't know what you mean by "direct." In all these cases there is an electrical connection between the device and the computer that conveys power and the control and data signals. What can be more "direct" than that?
Well, usb is a scsi protocol transport (T10), not a ata protocol transport (T13). So the linux kernel sends scsi commands to the usb adapter. It has a SAT device (scsi to ata translator) that turns those into ata commands and sends those to the drive. So a bug in the SAT device can cause the drive to not work correctly. I don't consider that a direct connection. Greg -- Greg Freemyer Head of EDD Tape Extraction and Processing team Litigation Triage Solutions Specialist http://www.linkedin.com/in/gregfreemyer First 99 Days Litigation White Paper - http://www.norcrossgroup.com/forms/whitepapers/99%20Days%20whitepaper.pdf The Norcross Group The Intersection of Evidence & Technology http://www.norcrossgroup.com -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org