159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:38 TRACE: [@(#) Build number: 246] /dev/loop0
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:38 TRACE: [@(#) Build number: 246] ====End of output from '/sbin/losetup'.
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:40 TRACE: [@(#) Build number: 246] ====Executing [/sbin/blkid -c /dev/null /dev/loop0]
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:40 TRACE: [@(#) Build number: 246] /dev/loop0: PTUUID="00041d0c" PTTYPE="dos"
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:40 TRACE: [@(#) Build number: 246] ====End of output from '/sbin/blkid'.
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:40 TRACE: [@(#) Build number: 246] Attached VMDK 'vm-422-disk-key-2000-flat.vmdk' at '/dev/loop0' with partitions [/dev/loop0p3 /dev/loop0p2 /dev/loop0p1]
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:40 TRACE: [@(#) Build number: 246] ====Executing [/sbin/losetup --find --show -P /opt/emc/vproxy/runtime/state/flr/temp/nfs-905033c8-d093-46c7-a8b3-ea9722b76eeb/vm-422-disk-key-2001-flat.vmdk]
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:40 TRACE: [@(#) Build number: 246] /dev/loop2
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:40 TRACE: [@(#) Build number: 246] ====End of output from '/sbin/losetup'.
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:42 TRACE: [@(#) Build number: 246] ====Executing [/sbin/blkid -c /dev/null /dev/loop2]
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:42 TRACE: [@(#) Build number: 246] ====Executing [/sbin/losetup -d /dev/loop2]
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:44 TRACE: [@(#) Build number: 246] ====Executing [/sbin/losetup --find --show -P /opt/emc/vproxy/runtime/state/flr/temp/nfs-905033c8-d093-46c7-a8b3-ea9722b76eeb/vm-422-disk-key-2001-flat.vmdk]
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:44 TRACE: [@(#) Build number: 246] /dev/loop2
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:44 TRACE: [@(#) Build number: 246] ====End of output from '/sbin/losetup'.
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:46 TRACE: [@(#) Build number: 246] ====Executing [/sbin/blkid -c /dev/null /dev/loop2]
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:46 TRACE: [@(#) Build number: 246] Removing 1 temporary loop devices
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:46 TRACE: [@(#) Build number: 246] ====Executing [/sbin/losetup -d /dev/loop0]
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:46 TRACE: [@(#) Build number: 246] ====Executing [/sbin/pvscan --cache]
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:46 TRACE: [@(#) Build number: 246] File descriptor 10 (socket:[4601043]) leaked on pvscan invocation. Parent PID 2560: /opt/emc/vproxy/bin/vflrd
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:46 TRACE: [@(#) Build number: 246] /dev/loop1: read failed after 0 of 4096 at 10737352704: Input/output error
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:46 TRACE: [@(#) Build number: 246] /dev/loop1: read failed after 0 of 4096 at 10737410048: Input/output error
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:46 TRACE: [@(#) Build number: 246] /dev/loop1: read failed after 0 of 4096 at 0: Input/output error
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:46 TRACE: [@(#) Build number: 246] /dev/loop1: read failed after 0 of 4096 at 4096: Input/output error
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:46 TRACE: [@(#) Build number: 246] ====End of output from '/sbin/pvscan'.
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:46 ERROR: [@(#) Build number: 246] Unable to unmount '/opt/emc/vproxy/runtime/state/flr/temp/nfs-905033c8-d093-46c7-a8b3-ea9722b76eeb': device or resource busy
159373:nsrvproxy_flr: vProxy Log: 2019/01/08 14:56:46 INFO: [@(#) Build number: 246] Unmounting after mount failure: Unable to get partition information: exit status 2
<VM_Name>:~ # fdisk -l
Disk /dev/sdb: 10 GiB, 10737418240 bytes, 20971520 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/sda: 30 GiB, 32212254720 bytes, 62914560 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00041d0c
Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 4208639 4206592 2G 82 Linux swap / Solaris
/dev/sda2 * 4208640 29382655 25174016 12G 83 Linux
/dev/sda3 29382656 62914559 33531904 16G 83 Linux
<VM_Name>:~ # file -sL /dev/sd*
/dev/sda: DOS/MBR boot sector
/dev/sda1: Linux/i386 swap file (new style), version 1 (4K pages), size 525823 pages, no label, UUID=0ce67b73-cf94-4511-84f6-572201fd8491
/dev/sda2: DOS/MBR boot sector
/dev/sda3: SGI XFS filesystem data (blksz 4096, inosz 512, v2 dirs)
/dev/sdb: data
<VM_Name>:~ # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 16G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 15G 0 part ├─centos-root 253:0 0 13.4G 0 lvm / └─centos-swap 253:1 0 1.6G 0 lvm [SWAP] sdb 8:16 0 1G 0 disk sr0 11:0 1 1024M 0 rom <VM_Name>:~ # blkid /dev/sda1: UUID="0ce67b73-cf94-4511-84f6-572201fd8491" TYPE="swap" PARTUUID="00041d0c-01" /dev/sda2: UUID="8375d6ba-626d-43ef-a881-82230d4b84a5" UUID_SUB="b333cada-c2fe-48aa-8a24-f6f839a0c46a" TYPE="btrfs" PTTYPE="dos" PARTUUID="00041d0c-02" /dev/sda3: UUID="6514e3e9-5bea-467f-8f73-479a71380753" TYPE="xfs" PARTUUID="00041d0c-03" /dev/sr0: UUID="2017-07-12-03-04-39-00" LABEL="SLE-12-SP3-Server-DVD-x86_640473" TYPE="iso9660" PTUUID="1285b34e" PTTYPE="dos"From the above commands we can see that a device (/dev/sdb) is attached to the VM but it has no formatting, partition, or data.
A code fix was released to skip the unformatted disk.
Prior to NetWorker 19.7.x and vProxy 4.3.0-29, perform an Instant Recovery of the VM. This creates a temporary (offline) copy of the VM on the Data Domain system. The needed disks can be NFS mounted to the source (online) VM and copied from the VM operating system. This process is detailed under: https://www.dell.com/support/kbdoc/000158482