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Current release of SCSI hot swap controller (HSC) firmware, version 1.07 or earlier, has an I2C bus protocol issue.
There are three visible symptoms of this issue.
- First, the system may hang during boot or during the power on self test (POST).
- Second, the system may mark DIMMs off line with no indication during the POST memory initialization.
- Third, a firmware update of the mini base board controller (mBMC) may fail to complete successfully.
The chance of any of these errors occurring varies from about 30% to 50%.
To correct this issue, How-Swap Controller Firmware version 1.12 or later has been released. The SCSI back plane HSC firmware must be updated to version 1.12 first before updating the server board mBMC firmware.
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