Skip to main content
  • Place orders quickly and easily
  • View orders and track your shipping status
  • Enjoy members-only rewards and discounts
  • Create and access a list of your products
  • Manage your Dell EMC sites, products, and product-level contacts using Company Administration.

Article Number: 000054904


NVP-vProxy: FLR recovery of Linux XFS(version 5) fails with error: FLR_ERROR: Unable to mount any FLR file systems.

Article Content


Symptoms



NetWorker 9.1.x vProxy versions (2.0.0-12 or 2.0.0-12_1) based FLR recovery of a Linux host fails to mount the hosts XFS filesystems.
Impact is only to systems using newer version 5 XFS i.e. RHEL 7(or similar like CentOS 7)
In the FLR mount logs the following errors:
 

2017/02/17 14:53:00 TRACE:  [@(#) Build number: 43] Mounting '/dev/EMC-FLR#########/lv_root' on '/opt/emc/vproxyra/flr/mountpoints/FLR#########/lvm00-lv_root', fstype 'xfs'
2017/02/17 14:53:00 TRACE:  [@(#) Build number: 43] Could not mount '/dev/EMC-FLR#########/lv_root': Invalid argument
2017/02/17 14:53:00 TRACE:  [@(#) Build number: 43] No LVM volumes were mounted.
2017/02/17 14:53:00 TRACE:  [@(#) Build number: 43] No LVM volumes were mounted.
2017/02/17 14:53:00 TRACE:  [@(#) Build number: 43] Unable to mount any FLR file systems.
2017/02/17 14:53:00 TRACE:  [@(#) Build number: 43] Removing device '0:0:1:0'
2017/02/17 14:53:00 TRACE:  [@(#) Build number: 43] FLR_ERROR: Unable to mount any FLR file systems.
2017/02/17 14:53:00 TRACE:  [@(#) Build number: 43] Mount error: exit status 1
2017/02/17 14:53:00 TRACE:  [@(#) Build number: 43] Mount [0/1/0] failed: Unable to mount any FLR file systems.
 

At the time of mount failure, the (destination) VM s /var/log/messages file will show:

Corruption warning: Metadata has LSN (#:#####) ahead of current LSN (#:#). Please unmount and run xfs_repair (>= v4.3) to resolve.
 



 

Cause

vProxy v2.0.0 does not support File Level Recover from newer 7.3 Red Hat clients.
With these systems, XFS version on source client is higher than what is used in the vProxy OS.
  • vProxy v2.0.0.x uses xfsprogs-3.2.1-3.5.x86_64
  • In this example, source client uses a newer xfs version:
rpm -qa|grep xfs
xfsprogs-4.5.0-8.el7.x86_64

As a result, during FLR, vProxy fails to work on newer XFS version.

Resolution

Fix:
Use NetWorker v9.2(or newer) with vProxy 2.1.0-17(or newer).


Workaround:
Use Alternative recovery mechanism like Image recover.

Article Properties


Last Published Date

20 Nov 2020

Version

2

Article Type

Solution