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dracut Warning: No root device "block:/dev/disk/by-label/DBSYS" found というメッセージにより Exadata ノードの起動が失敗する (Doc ID 2275681.1)

Last updated on AUGUST 04, 2018

適用範囲:

Linux OS - バージョン Oracle Linux 6.0 以降
Linux x86
Linux x86-64

現象

Exadata ノード起動失敗時、コンソール画面に以下のようなメッセージが出力されます:

...
sda: sda1 sda2 sda3
sd 0:2:0:0: [sda] Attached SCSI disk
dracut: Scanning devices sda2 sda3 for LVM volume groups
dracut: Reading all physical volumes. This may take a while...
dracut: Found volume group "VGExaDb" using metadata type lvm2
dracut: FATAL: Module dm_snapshot not found.
dracut: /sbin/modprobe failed: 1
dracut: Can't process LV root_snap: snapshot target support missing from kernel?
dracut: Can't process LV os_backup_fs_snap: snapshot target support missing from kernel?
dracut: 34 logical volume(s) in volume group "VGExaDb" now active
dracut: Scanning devices sda2 sda3 for LVM volume groups
dracut: Reading all physical volumes. This may take a while...
dracut: Found volume group "VGExaDb" using metadata type lvm2
dracut: PARTIAL MODE. Incomplete logical volumes will be processed.
dracut: FATAL: Module dm_snapshot not found.
dracut: /sbin/modprobe failed: 1
dracut: Can't process LV root_snap: snapshot target support missing from kernel?
dracut: Can't process LV os_backup_fs_snap: snapshot target support missing from kernel?
dracut: 34 logical volume(s) in volume group "VGExaDb" now active


dracut Warning: No root device "block:/dev/disk/by-label/DBSYS" found

dracut Warning: Boot has failed. To debug this issue add "rdshell" to the kernel command line.

Kernel panic - not syncing: Attempted to kill init!

Pid: 1, comm: init Not tainted 2.6.39-400.250.4.el6uek.x86_64 #1

Call Trace:
[<ffffffff8150a90a>] panic+0xa6/0x1bd
[<ffffffff81061782>] ? enqueue_entity+0x52/0x210
[<ffffffff81071c8b>] forget_original_parent+0x32b/0x330
[<ffffffff8105af6f>] ? sched_move_task+0xaf/0x150
[<ffffffff81071cab>] exit_notify+0x1b/0x190
[<ffffffff81072dae>] do_exit+0x1fe/0x460
[<ffffffff81073065>] do_group_exit+0x55/0xd0
[<ffffffff810730f7>] sys_exit_group+0x17/0x20
[<ffffffff81515d02>] system_call_fastpath+0x16/0x1b

Rebooting in 60 seconds..

 

変更点

再起動実行前に、LVM スナップショットが作成されていました。

原因

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