Need Clocking Verification for your SSDs?

By Patty Brogdon | September 21, 2022 | SANBlaze

The SANBlaze SBExpress PCIe Gen5 system allows us to verify the various clocking modes below for customers’ drives, including:

  • Common clocking mode without SSC

  • Common clocking mode with SSC

  • Separate reference clock without SSC (Static SRNS)

  • Separate reference clock independent SSC (Static SRIS)

  • RefClk without SSC for PEX only (no RefClk to the target drive, Dynamic SRNS)

  • RefClk with SSC for PEX only (no RefClk with SSC to the target drive, Dynamic SRIS)




The SANBlaze SBExpress PCIe Gen5 Test System is using the Broadcom® PEX89144 PCI Express (PCIe) 5.0 switch, which supports the following PCIe clocking modes:

  • Separate reference clock independent SSC (SRIS)

  • Dynamic SRIS: no clock to the drive

  • Static SRIS: provide clock to the drive

  • Separate reference clock without SSC (SRNS)

  • Dynamic SRNS: no clock to the drive

  • Static SRNS: provide clock to the drive

  • Spread spectrum clocking (SSC) isolation

  • Common clocking mode (without SSC or with SSC)

In order to meet a customer’s requirement of PCIe clocking modes verification, we implemented the PCIe clocking in our PCIe Gen5 system (board with PN= 600-950003) and created this white paper to provide detailed information on how to use the CLI commands to verify the various clocking modes.


Click this link to download our free Clocking Mode Verification for Gen5 Test System white paper.



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