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CentOS 7.2 like Hyper-V guest VM RRS feed

  • Question

  • After update Windows Server with Hyper-V, I started to receive a lot of logs with "warn" and "err" tags from kernel during "Live Migration" of VM.

    Is it critical problem? Or I should ignore it? Thank you.

    P.S.

    There is only one VHD in VM - /dev/sda

    err kernel: sd 0:0:0:2: [sdb] Asking for cache data failed
     notice kernel: [2779709.386569] sd 0:0:0:2: [sdb] Write Protect is off
     err kernel: [2779709.387222] sd 0:0:0:2: [sdb] Asking for cache data failed
     err kernel: [2779709.387886] sd 0:0:0:2: [sdb] Assuming drive cache: write through
     err kernel: sd 0:0:0:2: [sdb] Assuming drive cache: write through
     notice kernel: sd 0:0:0:2: [sdb] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.389289] sd 0:0:0:2: [sdb] Sector size 0 reported, assuming 512.
     warning kernel: [2779709.390365] Dev sdb: unable to read RDB block 0
     info kernel: [2779709.390375] sdb: unable to read partition table
     warning kernel: Dev sdb: unable to read RDB block 0
     info kernel: sdb: unable to read partition table
     notice kernel: [2779709.392108] sd 0:0:0:2: [sdb] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.392913] sd 0:0:0:2: [sdb] Attached SCSI disk
     notice kernel: sd 0:0:0:2: [sdb] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:2: [sdb] Attached SCSI disk
     notice kernel: sd 0:0:0:3: [sdc] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:3: [sdc] 1 512-byte logical blocks: (512 B/512 B)
     notice kernel: [2779709.393685] sd 0:0:0:3: [sdc] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.393689] sd 0:0:0:3: [sdc] 1 512-byte logical blocks: (512 B/512 B)
     notice kernel: [2779709.393696] sd 0:0:0:3: [sdc] 0-byte physical blocks
     notice kernel: [2779709.393902] sd 0:0:0:3: [sdc] Write Protect is off
     notice kernel: sd 0:0:0:3: [sdc] 0-byte physical blocks
     notice kernel: sd 0:0:0:3: [sdc] Write Protect is off
     err kernel: sd 0:0:0:3: [sdc] Asking for cache data failed
     err kernel: sd 0:0:0:3: [sdc] Assuming drive cache: write through
     notice kernel: sd 0:0:0:4: [sdd] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:4: [sdd] 1 512-byte logical blocks: (512 B/512 B)
     notice kernel: sd 0:0:0:4: [sdd] 0-byte physical blocks
     err kernel: [2779709.394486] sd 0:0:0:3: [sdc] Asking for cache data failed
     err kernel: [2779709.395200] sd 0:0:0:3: [sdc] Assuming drive cache: write through
     notice kernel: [2779709.395237] sd 0:0:0:4: [sdd] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.395239] sd 0:0:0:4: [sdd] 1 512-byte logical blocks: (512 B/512 B)
     notice kernel: [2779709.395240] sd 0:0:0:4: [sdd] 0-byte physical blocks
     notice kernel: [2779709.395975] sd 0:0:0:4: [sdd] Write Protect is off
     err kernel: [2779709.396078] sd 0:0:0:4: [sdd] Asking for cache data failed
     notice kernel: [2779709.396576] sd 0:0:0:3: [sdc] Sector size 0 reported, assuming 512.
     err kernel: [2779709.396658] sd 0:0:0:4: [sdd] Assuming drive cache: write through
     notice kernel: sd 0:0:0:4: [sdd] Write Protect is off
     err kernel: sd 0:0:0:4: [sdd] Asking for cache data failed
     notice kernel: sd 0:0:0:3: [sdc] Sector size 0 reported, assuming 512.
     err kernel: sd 0:0:0:4: [sdd] Assuming drive cache: write through
     warning kernel: Dev sdc: unable to read RDB block 1
     info kernel: sdc: unable to read partition table
     warning kernel: sdc: partition table beyond EOD, enabling native capacity
     notice kernel: sd 0:0:0:3: [sdc] Sector size 0 reported, assuming 512.
     warning kernel: Dev sdc: unable to read RDB block 1
     info kernel: sdc: unable to read partition table
     warning kernel: sdc: partition table beyond EOD, truncated
     warning kernel: [2779709.398049] Dev sdc: unable to read RDB block 1
     info kernel: [2779709.398053] sdc: unable to read partition table
     warning kernel: [2779709.398056] sdc: partition table beyond EOD, enabling native capacity
     notice kernel: [2779709.398586] sd 0:0:0:3: [sdc] Sector size 0 reported, assuming 512.
     warning kernel: [2779709.398723] Dev sdc: unable to read RDB block 1
     info kernel: [2779709.398738] sdc: unable to read partition table
     warning kernel: [2779709.398738] sdc: partition table beyond EOD, truncated
     notice kernel: [2779709.399756] sd 0:0:0:3: [sdc] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:3: [sdc] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.400446] sd 0:0:0:4: [sdd] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.400453] sd 0:0:0:3: [sdc] Attached SCSI disk
     notice kernel: [2779709.400569] sd 0:0:0:6: [sdf] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.400572] sd 0:0:0:6: [sdf] 1 512-byte logical blocks: (512 B/512 B)
     notice kernel: [2779709.400574] sd 0:0:0:6: [sdf] 0-byte physical blocks
     notice kernel: [2779709.400605] sd 0:0:0:6: [sdf] Write Protect is off
     notice kernel: [2779709.400613] sd 0:0:0:7: [sdg] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.400621] sd 0:0:0:7: [sdg] 1 512-byte logical blocks: (512 B/512 B)
     notice kernel: [2779709.400622] sd 0:0:0:7: [sdg] 0-byte physical blocks
     err kernel: [2779709.400707] sd 0:0:0:6: [sdf] Asking for cache data failed
     notice kernel: [2779709.401211] sd 0:0:0:5: [sde] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.401213] sd 0:0:0:5: [sde] 1 512-byte logical blocks: (512 B/512 B)
     notice kernel: [2779709.401214] sd 0:0:0:5: [sde] 0-byte physical blocks
     err kernel: [2779709.401275] sd 0:0:0:6: [sdf] Assuming drive cache: write through
     notice kernel: [2779709.401869] sd 0:0:0:7: [sdg] Write Protect is off
     notice kernel: sd 0:0:0:4: [sdd] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:3: [sdc] Attached SCSI disk
     notice kernel: sd 0:0:0:6: [sdf] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:6: [sdf] 1 512-byte logical blocks: (512 B/512 B)
     notice kernel: sd 0:0:0:6: [sdf] 0-byte physical blocks
     notice kernel: sd 0:0:0:6: [sdf] Write Protect is off
     notice kernel: sd 0:0:0:7: [sdg] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:7: [sdg] 1 512-byte logical blocks: (512 B/512 B)
     notice kernel: sd 0:0:0:7: [sdg] 0-byte physical blocks
     err kernel: sd 0:0:0:6: [sdf] Asking for cache data failed
     notice kernel: sd 0:0:0:5: [sde] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:5: [sde] 1 512-byte logical blocks: (512 B/512 B)
     notice kernel: sd 0:0:0:5: [sde] 0-byte physical blocks
     err kernel: sd 0:0:0:6: [sdf] Assuming drive cache: write through
     notice kernel: sd 0:0:0:7: [sdg] Write Protect is off
     err kernel: sd 0:0:0:7: [sdg] Asking for cache data failed
     err kernel: [2779709.402182] sd 0:0:0:7: [sdg] Asking for cache data failed
     err kernel: [2779709.402704] sd 0:0:0:7: [sdg] Assuming drive cache: write through
     notice kernel: [2779709.402859] sd 0:0:0:5: [sde] Write Protect is off
     err kernel: [2779709.403302] sd 0:0:0:5: [sde] Asking for cache data failed
     notice kernel: [2779709.403543] sd 0:0:0:6: [sdf] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.403635] sd 0:0:0:7: [sdg] Sector size 0 reported, assuming 512.
     warning kernel: [2779709.403782] Dev sdf: unable to read RDB block 1
     info kernel: [2779709.403785] sdf: unable to read partition table
     warning kernel: [2779709.403788] sdf: partition table beyond EOD, enabling native capacity
     err kernel: [2779709.403846] sd 0:0:0:5: [sde] Assuming drive cache: write through
     warning kernel: [2779709.403866] Dev sdg: unable to read RDB block 1
     info kernel: [2779709.403869] sdg: unable to read partition table
     warning kernel: [2779709.403871] sdg: partition table beyond EOD, enabling native capacity
     warning kernel: [2779709.404480] Dev sdd: unable to read RDB block 1
     info kernel: [2779709.404484] sdd: unable to read partition table
     warning kernel: [2779709.404486] sdd: partition table beyond EOD, enabling native capacity
     notice kernel: [2779709.404882] sd 0:0:0:7: [sdg] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.404891] sd 0:0:0:4: [sdd] Sector size 0 reported, assuming 512.
     err kernel: sd 0:0:0:7: [sdg] Assuming drive cache: write through
     notice kernel: sd 0:0:0:5: [sde] Write Protect is off
     err kernel: sd 0:0:0:5: [sde] Asking for cache data failed
     notice kernel: sd 0:0:0:6: [sdf] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:7: [sdg] Sector size 0 reported, assuming 512.
     warning kernel: Dev sdf: unable to read RDB block 1
     info kernel: sdf: unable to read partition table
     warning kernel: sdf: partition table beyond EOD, enabling native capacity
     err kernel: sd 0:0:0:5: [sde] Assuming drive cache: write through
     warning kernel: Dev sdg: unable to read RDB block 1
     info kernel: sdg: unable to read partition table
     warning kernel: sdg: partition table beyond EOD, enabling native capacity
     warning kernel: Dev sdd: unable to read RDB block 1
     info kernel: sdd: unable to read partition table
     warning kernel: sdd: partition table beyond EOD, enabling native capacity
     notice kernel: sd 0:0:0:7: [sdg] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:4: [sdd] Sector size 0 reported, assuming 512.
     warning kernel: Dev sdd: unable to read RDB block 1
     info kernel: sdd: unable to read partition table
     warning kernel: sdd: partition table beyond EOD, truncated
     warning kernel: [2779709.405214] Dev sdd: unable to read RDB block 1
     info kernel: [2779709.405219] sdd: unable to read partition table
     warning kernel: [2779709.405221] sdd: partition table beyond EOD, truncated
     warning kernel: [2779709.405664] Dev sdg: unable to read RDB block 1
     info kernel: [2779709.405668] sdg: unable to read partition table
     warning kernel: [2779709.405671] sdg: partition table beyond EOD, truncated
     warning kernel: Dev sdg: unable to read RDB block 1
     info kernel: sdg: unable to read partition table
     warning kernel: sdg: partition table beyond EOD, truncated
     notice kernel: sd 0:0:0:6: [sdf] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.406190] sd 0:0:0:6: [sdf] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.407048] sd 0:0:0:4: [sdd] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.407064] sd 0:0:0:7: [sdg] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.407186] sd 0:0:0:5: [sde] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:4: [sdd] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:7: [sdg] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:5: [sde] Sector size 0 reported, assuming 512.
     warning kernel: [2779709.407477] Dev sdf: unable to read RDB block 1
     info kernel: [2779709.407481] sdf: unable to read partition table
     warning kernel: [2779709.407484] sdf: partition table beyond EOD, truncated
     notice kernel: [2779709.407727] sd 0:0:0:7: [sdg] Attached SCSI disk
     notice kernel: [2779709.407734] sd 0:0:0:4: [sdd] Attached SCSI disk
     notice kernel: [2779709.407933] sd 0:0:0:6: [sdf] Sector size 0 reported, assuming 512.
     warning kernel: Dev sdf: unable to read RDB block 1
     info kernel: sdf: unable to read partition table
     warning kernel: sdf: partition table beyond EOD, truncated
     notice kernel: sd 0:0:0:7: [sdg] Attached SCSI disk
     notice kernel: sd 0:0:0:4: [sdd] Attached SCSI disk
     notice kernel: sd 0:0:0:6: [sdf] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.409149] sd 0:0:0:6: [sdf] Attached SCSI disk
     warning kernel: [2779709.409565] Dev sde: unable to read RDB block 1
     info kernel: [2779709.409569] sde: unable to read partition table
     warning kernel: [2779709.409573] sde: partition table beyond EOD, enabling native capacity
     notice kernel: sd 0:0:0:6: [sdf] Attached SCSI disk
     warning kernel: Dev sde: unable to read RDB block 1
     info kernel: sde: unable to read partition table
     warning kernel: sde: partition table beyond EOD, enabling native capacity
     notice kernel: [2779709.411009] sd 0:0:0:5: [sde] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:5: [sde] Sector size 0 reported, assuming 512.
     warning kernel: [2779709.411492] Dev sde: unable to read RDB block 1
     info kernel: [2779709.411496] sde: unable to read partition table
     warning kernel: [2779709.411500] sde: partition table beyond EOD, truncated
     warning kernel: Dev sde: unable to read RDB block 1
     info kernel: sde: unable to read partition table
     warning kernel: sde: partition table beyond EOD, truncated
     notice kernel: [2779709.412550] sd 0:0:0:5: [sde] Sector size 0 reported, assuming 512.
     notice kernel: sd 0:0:0:5: [sde] Sector size 0 reported, assuming 512.
     notice kernel: [2779709.412915] sd 0:0:0:5: [sde] Attached SCSI disk
     notice kernel: sd 0:0:0:5: [sde] Attached SCSI disk
     err systemd-udevd: inotify_add_watch(7, /dev/sde, 10) failed: No such file or directory
     info systemd-udevd: error: /dev/sde: No such file or directory
     info kernel: [2779711.540951] hv_balloon: Received INFO_TYPE_MAX_PAGE_CNT
     info kernel: [2779711.540965] hv_balloon: Data Size is 8
     info kernel: hv_balloon: Received INFO_TYPE_MAX_PAGE_CNT
     info kernel: hv_balloon: Data Size is 8


    Thursday, December 22, 2016 8:45 AM