Error #0:
OMV\ExecException: Failed to execute command 'export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C.UTF-8; omv-mkraid /dev/md0 -l mirror -n 2 -N Storage /dev/sdb /dev/sdc 2>&1' with exit code '2': mdadm: super1.x cannot open /dev/sdb: Device or resource busy
mdadm: ddf: Cannot use /dev/sdb: Device or resource busy
mdadm: Cannot use /dev/sdb: It is busy
mdadm: cannot open /dev/sdb: Device or resource busy in /usr/share/php/openmediavault/system/process.inc:182
Stack trace:
#0 /usr/share/openmediavault/engined/rpc/raidmgmt.inc(300): OMV\System\Process->execute()
#1 [internal function]: Engined\Rpc\RaidMgmt->create(Array, Array)
#2 /usr/share/php/openmediavault/rpc/serviceabstract.inc(123): call_user_func_array(Array, Array)
#3 /usr/share/php/openmediavault/rpc/rpc.inc(86): OMV\Rpc\ServiceAbstract->callMethod('create', Array, Array)
#4 /usr/sbin/omv-engined(537): OMV\Rpc\Rpc::call('RaidMgmt', 'create', Array, Array, 1)
#5 {main}