PowerEdge: Kioxia CM6 NVMe SSDs Experience I2C Bus Issues on 17G Servers

Summary: Kioxia CM6 NVMe SSDs on 17‑generation servers experience I2C (Inter‑Integrated Circuit) communication issues. The fan speed stays locked at 100 % after OS boot. This behavior is observed on 17G servers only running Integrated Dell Remote Access Controller (iDRAC) 10 firmware version 1.30.10.50 or older. ...

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Symptoms

  • Fan speed on the cooling page remains at 100 % after booting into the operating system when using iDRAC10 1.30.10.50 or older.
  • Clock stretching on the I2C bus causes response times to exceed specifications and results in time‑outs.
  • Other devices on the I2C bus may experience communication problems due to the clock‑stretching events.

Cause

The root cause of the issue is an I2C communication fault in iDRAC 10 firmware versions 1.30.10.50 or older. This defect affects the I2C controller handling of Kioxia CM6 NVMe drives on 17G servers.

  • Clock‑stretching events occur on the I2C bus, causing response times to exceed specification limits.
  • Extended response times trigger time‑outs, leading to communication failures for the NVMe drives, and other devices sharing the I2C bus.
  • Repeated clock‑stretching can destabilize the backplane, risking loss of connectivity for all attached drives.

Resolution

Upgrade iDRAC Firmware to 1.30.30.50 or Newer to Resolve I2C Communication and Fan Speed Issues.

Affected Products

AX-670, AX-770, Dell XC Core XC670, Dell XC Core XC6715, Dell XC Core XC770, OEMR XL R470, OEMR XL R570, OEMR XL R670, OEMR XL R770, OEMR XL R6715, OEMR XL R6725, OEMR XL R7715, OEMR XL R7725, PowerEdge M7725, PowerEdge R470, PowerEdge R570 , PowerEdge R670, PowerEdge R6715, PowerEdge R6725, PowerEdge R770, PowerEdge R770AP, PowerEdge R7715, PowerEdge R7725, PowerEdge R7725xd, PowerEdge XE7740, PowerEdge XE7745, PowerEdge XE8712, PowerEdge XE9712, PowerEdge XE9780, PowerEdge XE9780L, PowerEdge XE9785, PowerEdge XE9785L, PowerEdge XR8000-P, PowerEdge XR8720t, Dell vSAN R670 Ready Node, Dell vSAN R6715 Ready Node, Dell vSAN R770 Ready Node, Dell vSAN R7715 Ready Node, Dell vSAN R7725 Ready Node, VxRail VE-670, VxRail VP-770 ...
Article Properties
Article Number: 000430558
Article Type: Solution
Last Modified: 01 Jul 2026
Version:  4
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