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Cisco Bug: CSCvt16048 - mmc blk_update_request I/O errors seen while collecting showtech OS

Last Modified

Sep 02, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)


On Cisco NCS 540L router, when issuing <CmdBold>show tech os<noCmdBold>, below error message may appear and/or repeat

blk_update_request: I/O error, dev mmcblk0rpmb, sector 0

Below messages are in show tech file of the RP.

++++++++++ List partition layout [11:43:55.450 IST Mon Feb 24 2020] +++++++++++

Error: /dev/mmcblk0rpmb: unrecognised disk label
Warning: Error fsyncing/closing /dev/mmcblk0rpmb: Input/output error
Error: /dev/mmcblk0boot0: unrecognised disk label
Error: /dev/mmcblk0boot1: unrecognised disk label

Symptoms are observed on routers with eMMC drive that includes a RPMB, or read protected memory block, partition.

Messages are informative only. Non operation impacting.
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