Tech Brief: Recording SATA DevSlp Low Power
Contents
1. Configuration used for Host Emulation mode 4 Record traces in the normal way The DevSlp Status will be recorded in the trace and will be displayed by the software Figure 6 Recorded trace showing DevSip status To show Device Sleep status in Packet View during Command sequences open up any FIS Type packet to the Link level then right click on the green Link field On the menu that then appears choose Show Field then Device Sleep as shown Likewise to show Device Sleep during OOB sequences right click on any OOB packet to bring up the Show Field menu Figure 4 Attachment of probe leads to DevSip and GND pins attachment clips shown here 3 b For host emulation mode connect the power or power sense cable 921095 or 921097 to the power connector on the exansion card Connect the other end to the power connector on the DUT Connect a SATA cable from the from the Target port of the analyzer to the DUT Recording Protocol Traces for Device Sleep DevSip Drives Teledyne LeCroy Page 2 of 22. at a time until the card is fully released TECHNICAL BRIEF Recording Protocol Traces for Device Sleep DevSlp Drives 2 Recording Protocol Traces for Device Sleep DevSip Drives Matthew Dunn and Peter Lizak Teledyne LeCroy Protocol Solutions Group 3 A Nee C a powe ae Figure 1 Removing an existing expansion card Insert the ACC EXP 005 X Sierra External Power Expansion Card by sliding it into the slots provided and tighting the screws using a standard screwdriver Figure 2 Inserting the ACC EXP 005 X card a For pass through mode connect the power or power sense cable 921671 to the POWER connector on the expansion card Connect the other end of the cable to the ground and DevSlp line on the device under test DUT This connection can be made either by soldering short wires Supplied to exposed traces or pins or by clipping the attachment clips also supplied to pins Connect SATA data cables from the HBA to the Initiator port on the analyzer and then from the Target port of the analyzer to the DUT Teledyne LeCroy Page 1 of 2 Y Everywhereyoulook ae ee aaa Detection Of Device Sleep in pass through mode Detection Of Device Sleep Host Emulator Mode SATA Power DvSlp SATA Power Ovsip COENE i pres Cable SATA 921095 or 9271095 HBA SATA Cable Teledyne LeCroy Sierra SATA Analyser Figure 3 Configuration used for pass through mode Figure 5
3. wm TELEDYNE LECROY Everywhereyoulook H s solid state drives SSDs continue to develop in capability and sophistication new features such as Device Sleep DevSlp are being added to the feature set of many drives DevSlp allows a drive to sleep in a very low power state typically about 5 of power draw compared to IDLE mode while maintaining a quick response to access requirements for the drive Recording of protocol traces for drives using DevSlp requires the protocol analyzer to be able to monitor the DevSlp state and record this information along with normal data traffic Teledyne LeCroy supports this capability for systems including the Sierra M6 2 Sierra M6 4 and Sierra M124 by offering an expansion card that has the ability to directly monitor DevSlp status and records this information as part of the trace file stored by the protocol analyzer Process To record DevSlp status the ACC EXP 005 X expansion card is required This card inserts into the expansion slot available on certain Teledyne LeCroy protocol analyzer systems To use the system follow these steps 1 Power off the Sierra system and remove the blank cover plate from the expansion slot see page 32 of the User Manual for detailed instructions If there is already a different expansion card in use remove the expansion card by using the special removal tool supplied and slowing backing the existing expansion card out by loosening one side
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