"device or resource busy" on mdadm create
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| mdadm (Ubuntu) |
Confirmed
|
Undecided
|
Dimitri John Ledkov | ||
Bug Description
The issue manifested itself as a random failure during device creation:
$ mdadm --create /dev/md0 --level=0 --chunk 256 --raid-devices=4 /dev/xvdh1 /dev/xvdh2 /dev/xvdh3 /dev/xvdh4
mdadm: Defaulting to version 1.2 metadata
mdadm: ADD_NEW_DISK for /dev/xvdh3 failed: Device or resource busy
The problem can be solved by disabling udev events during device creation to avoid contention on device handles.
$ udevadm control --stop-exec-queue
$ mdadm --create /dev/md0 --run --level=0 --raid-devices=4 ...
$ udevadm control --start-exec-queue
And we now have consistent reliable device creation.
More details: http://
Note: I am not the author of the post, but I experience the same issue, also using instances on Amazon EC2.
| Launchpad Janitor (janitor) wrote | #1 |
| Changed in mdadm (Ubuntu): | |
| status: | New → Confirmed |
| Changed in mdadm (Ubuntu): | |
| assignee: | nobody → Dmitrijs Ledkovs (dmitrij.ledkov) |
Status changed to 'Confirmed' because the bug affects multiple users.