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Text below is taken from customer description of his environment which has two worker appliances, both of which encounter failures when attempting to scan vm appliances using UEFI . ===== There is only one HD on the VMs that are failing. The VMs that are currently failing with this error are (listing for my own sake): - ipa01 - ipa02 - mta01 - rhs01 - rhs02 - ssh01 - sto01 All of these are running RHEL 7.2 using a thin provisioned disk. There are several other RHEL VMs that are succeeding (few examples): - cfg01 - dns01 - mon01 These VMs are also running RHEL 7.2 using a thin provisioned disk. ============================================= Below is a comparison of the partitioning layout between VMs that are failing (ssh01, ipa01) and VMs that are succeeding (mon01, cfg01) FAILING: [root@ssh01 ~]# df -T Filesystem Type 1K-blocks Used Available Use% Mounted on /dev/mapper/rhel-root xfs 18102272 1969180 16133092 11% / devtmpfs devtmpfs 1930668 0 1930668 0% /dev tmpfs tmpfs 1941056 64 1940992 1% /dev/shm tmpfs tmpfs 1941056 130028 1811028 7% /run tmpfs tmpfs 1941056 0 1941056 0% /sys/fs/cgroup /dev/sda2 xfs 508588 195696 312892 39% /boot /dev/sda1 vfat 204580 9636 194944 5% /boot/efi tmpfs tmpfs 388212 0 388212 0% /run/user/0 [root@ipa01 ~]# df -T Filesystem Type 1K-blocks Used Available Use% Mounted on /dev/mapper/rhel-root_lv xfs 19191808 4169968 15021840 22% / devtmpfs devtmpfs 3986852 0 3986852 0% /dev tmpfs tmpfs 3997052 68 3996984 1% /dev/shm tmpfs tmpfs 3997052 270936 3726116 7% /run tmpfs tmpfs 3997052 0 3997052 0% /sys/fs/cgroup /dev/sda2 xfs 508588 234120 274468 47% /boot /dev/sda1 vfat 204580 9636 194944 5% /boot/efi tmpfs tmpfs 799412 0 799412 0% /run/user/0 SUCCEEDING: [root@mon01 ~]# df -T Filesystem Type 1K-blocks Used Available Use% Mounted on /dev/mapper/rhel_mon01-root xfs 18307072 6602188 11704884 37% / devtmpfs devtmpfs 3986916 0 3986916 0% /dev tmpfs tmpfs 3997344 64 3997280 1% /dev/shm tmpfs tmpfs 3997344 98804 3898540 3% /run tmpfs tmpfs 3997344 0 3997344 0% /sys/fs/cgroup /dev/sda1 xfs 508588 182320 326268 36% /boot tmpfs tmpfs 799472 0 799472 0% /run/user/0 [root@cfg01 ~]# df -T Filesystem Type 1K-blocks Used Available Use% Mounted on /dev/mapper/rhel_cfg01-root xfs 37300436 3243100 34057336 9% / devtmpfs devtmpfs 1922520 0 1922520 0% /dev tmpfs tmpfs 1932948 0 1932948 0% /dev/shm tmpfs tmpfs 1932948 186072 1746876 10% /run tmpfs tmpfs 1932948 0 1932948 0% /sys/fs/cgroup /dev/sda1 xfs 508588 155272 353316 31% /boot tmpfs tmpfs 386592 0 386592 0% /run/user/0 ============================================= The scan fails on both cwk01 and cwk02 appliances. It appears that all VMs that have a vfat UEFI partition are failing. VMs that do not have this partition are succeeding. This is the only difference i see thus far. No errors are reported in vCenter on any of the VMs failing to scan. =====