1. T10/11-119r0 by Robert Elliott, HP (elliott@hp.com) 7 March 2011
SCSI over PCI Express (SOP) SCSI Trade Association/T10 Information Exchange March 2011
T10/11-119r0
by Robert Elliott, HP
7 March 2011

2. Proposal: SCSI over PCIe (SOP)
Configuration space definitions, register definitions, queue structures, and information unit formats to carry SCSI CDBs over PCI Express
Goal
Optimize SSD performance
Embrace modern PCI Express features
Fully support SCSI Architecture Model (SAM-5) and
new SCSI features
Leverage existing SCSI software
Facilitate optimized device drivers (e.g., memory usage)
Allow for a basic in-box device driver
Allow for vendor-specific value-add drivers
Support a wide range of use cases (see next slide)
7 March 2011
T10/11-119r0 SCSI over PCI Express (SOP) for March 2011 STA/T10 meeting

3. Use cases SOP is not just for SSDs 1. PCIe CEM attached SSDs
3. PCIe attached RAID controllers
5. Internal interface for external targets
HP P2000 MSA external RAID controller
(SAS, iSCSI, or FC front-end; SAS back-end)
HP PCIe IO Accelerator
HP Smart Array P800 controller
2. PCIe Storage FF attached SSDs
4. PCIe attached HBAs
6. Other PCIe fabrics
HP 2.5" SSD (SATA shown)
HP NC373F iSCSI HBA and NIC
7 March 2011
T10/11-119r0 SCSI over PCI Express (SOP) for March 2011 STA/T10 meeting

4. Supporting work
SOP is just part of the story to make PCIe storage viable...
Work
Venue
SOP
INCITS T10
SCSI Block Commands (SBC) enhancements for SSDs
Simplified SBC command set profile for SSDs
PCIe SOP tunneling over SAS
Multifunction MultiLink connector
SFF Committee
PCIe Storage form factor
PCIe error handling improvements
PCI SIG
Electrical specification for
PCIe Storage form factor devices
PCI SIG (?)
7 March 2011
T10/11-119r0 SCSI over PCI Express (SOP) for March 2011 STA/T10 meeting