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[Frank Heimes <1689946@xxxxxxxxxxxxxxxxxx>]

** Also affects: ubuntu-power-systems
   Importance: Undecided
       Status: New

** Changed in: ubuntu-power-systems
       Status: New => In Progress

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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1689946

Title:
  Ubuntu16.04: NVMe 4K+T10 DIF/DIX format returns I/O error on dd with
  split op

Status in The Ubuntu-power-systems project:
  In Progress
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  ==== State: Open by: mdate on 19 March 2017 12:33:34 ====

  On a Bolt adapter in a system with Ubuntu 16.04, I've formatted the
  Bolt for T10 and am using it to do a dd with a 2M block size.

  Here are the commands:
  nvme format /dev/nvme0n1 --lbaf=1 --pil=0 --ms=0 --pi=2

  dd if=/dev/urandom of=/dev/nvme0n1 bs=2M oflag=direct count=1

  I get an error on the dd.
  	root@x1623bp1:~# dd if=/dev/urandom of=/dev/nvme0n1 bs=2M oflag=direct count=1
  	dd: error writing '/dev/nvme0n1': Input/output error
  	1+0 records in
  	0+0 records out
  	0 bytes copied, 0.0525061 s, 0.0 kB/s

  dmesg shows:
          [589997.985151] blk_update_request: I/O error, dev nvme0n1, sector 0

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