Article ID: 122340, created on Jul 12, 2014, last review on Jun 17, 2016

  • Applies to:
  • Virtuozzo containers for Linux 4.7
  • Virtuozzo containers for Linux 4.6


It is not possible to boot into the PVCfL 4.7 kernel on CentOS 5.x after upgrading to PVCfL 4.7 if the root is placed on software RAID built with dmraid.

A similar output may be observed on the server console: `switchroot mount failed: No such file or directory.

 [3.668771] Kernel panic - not syncing. Attempted to kill init!
 [3.668887] Pid: 1, comm: init veid2 0 Not tainted 2.6.32—042stab044.11 #1
 [3.669000] Call Trace2
 [3.669111] [<ffffffff814ca02c>] ? panic+0x78/0x143
 [3.669228] [<ffffffff8106f229>] ? do_exit+0x909/0x910
 [3.669401] [<ffffffff8106f288>] ? do_group_exit+0x58/0xd0
 [3.669515] [<ffffffff8106f317>] ? sys_exit_group+0x1?/0x20
 [3.669632] [<ffffffff8100b242>] ? system_call_fastpath+0x16/0x1b`


initrd contains following commands to detect dmraid on boot:

echo Scanning and configuring dmraid supported devices
dmraid -ay -i -p --rm_partitions "ddf1_RootVG"
kpartx -a -p p "/dev/mapper/ddf1_RootVG"

These commands fail to detect dmraid which causes boot to fail.

This behavior was reported as a product issue #PCLIN-31691.


Until the fix for PCLIN-31691 is released, please use one of the following workarounds:

  • Re-install the OS to CentOS 6 to gain full support for dmraid
  • Split the software RAID and use separate physical disks.

It is strongly recommended to use first suggestion (to re-install the host OS) as CentOS 6 is a native environment for 2.6.32 kernel family, and CentOS 5 cannot be as reliable as CentOS 6 while running on 2.6.32 kernel.

Additional information

You might want to check following related article:

113107 - Kernel panic after PVC upgrade on system with SCSI disks

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