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#238 – SAS 24GB+ Updates with Rick Kutcipal

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Once again Chris is joined by Rick Kutcipal, board member with the SCSI Trade Association. It’s been four years since episode #74 when Rick provided an update on SAS 24Gb. This time, Rick has details of new features in 24Gb+. What does the “plus” mean in this context? While the bus speed may not be increasing, new features (+) are continually being added to the SAS protocol, hence the additional designation.

In this episode, Rick discusses some interesting enhancements to drive management, mainly driven by the demands of hyper-scalers. These include Command Duration Limits, Format with Presets and Logical Depopulation. There are also additional features still in discussion that may yet be added in future releases.

To learn more about the work of the SCSI Trade Association, hop over to www.scsita.org, or of course, simply listen to our next podcast after Flash Memory Summit 2023.

Elapsed Time: 00:00:24:19

Timeline

  • 00:00:00 – Intros
  • 00:01:45 – How has the SCSI/SAS standard evolved?
  • 00:03:00 – There’s no need (currently) to go faster than 24Gb
  • 00:03:50 – What features keep SAS relevant in the market?
  • 00:05:35 – Hyper-scalers are driving the use of HDDs and SAS
  • 00:06:50 – What’s new in 24Gb+?
  • 00:09:45 – Enterprise customers will use new features (driven by hyper-scalers)
  • 00:10:15 – What is Command Duration Limits (CDL)?
  • 00:11:25 – What is Format with Presets?
  • 00:13:25 – What is Logical Depopulation?
  • 00:17:30 – Drive failure is a part of “normal” operations
  • 00:17:50 – What features are under consideration?
  • 00:20:15 – How will 24Gb+ features be rolled out?
  • 00:22:30 – Wrap Up

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