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Bug 2158730 - Cannot assemble DDF array with 6.2 kernel
Summary: Cannot assemble DDF array with 6.2 kernel
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
medium
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: 2158574 2163711
TreeView+ depends on / blocked
 
Reported: 2023-01-06 11:15 UTC by Vojtech Trefny
Modified: 2023-01-26 13:59 UTC (History)
22 users (show)

Fixed In Version:
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Clone Of:
Environment:
Last Closed: 2023-01-26 13:59:54 UTC
Type: Bug
Embargoed:

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Description Vojtech Trefny 2023-01-06 11:15:00 UTC 
Version-Release number of selected component (if applicable):

$ mdadm --version
mdadm - v4.2 - 2021-12-30

$ uname -r
6.2.0-0.rc1.20221230gitbff687b3dad6.15.fc38.x86_64

Steps to Reproduce:

$ sudo mdadm --create /dev/md/test --run --level=container --metadata=ddf --raid-devices=2 /dev/sdb /dev/sdc -v
mdadm: size set to 479232K
mdadm: ADD_NEW_DISK for /dev/sdb failed: Invalid argument

from journal:
Jan 06 12:06:25 fedora kernel: md: could not open device unknown-block(8,16).

Additional info:

We hit this issue in libblockdev[1] test suite and this is on a system without real BIOS RAID support so it is possible this a cause behind this issue, but it works on older versions of Fedora.

[1] https://github.com/storaged-project/libblockdev
Comment 1 Vojtech Trefny 2023-01-23 09:26:22 UTC 
I can both create and activate the DDF array on Fedora 37 with the same version of mdadm so I am moving this to kernel. I've also change the title since the DDF container can be created on F37 but cannot be activated on F38

# mdadm --assemble --scan
mdadm: failed to add /dev/sdc to /dev/md/ddf: Invalid argument
mdadm: failed to add /dev/sdb to /dev/md/ddf: Invalid argument
mdadm: Container /dev/md/ddf has been assembled with 0 drives (out of 2)
mdadm: timeout waiting for /dev/md/ddf

from journal:
Jan 23 09:15:14 fedora kernel: md: could not open device unknown-block(8,16).
Jan 23 09:15:14 fedora kernel: md: could not open device unknown-block(8,32).
Jan 23 09:15:14 fedora kernel: md: md127 stopped.
Jan 23 09:15:14 fedora kernel: block device autoloading is deprecated and will be removed.


I am also raising the severity because it is blocking the F38 change[1] to switch from dmraid to mdadm for BIOS RAID support.


[1] https://fedoraproject.org/wiki/Changes/UseMdadmForBIOSRAIDInAnaconda
Comment 2 Vojtech Trefny 2023-01-26 13:59:54 UTC 
This now works with the latest kernel 6.2.0-0.rc5.20230125git948ef7bb70c4.40.fc38.x86_64 in today Fedora.
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