Comment 127 for bug 1470250

Lo luck here :( Even though I have the hv_vss_daemon that logs FREEZE/THAW I experienced crashes:

Mar 15 10:36:38 emsi-02 Hyper-V VSS: VSS: op=FREEZE: succeeded
Mar 15 10:36:38 emsi-02 kernel: [320343.560935] sd 2:0:0:0: [storvsc] Sense Key : Unit Attention [current]
Mar 15 10:36:38 emsi-02 kernel: [320343.560949] sd 2:0:0:0: [storvsc] Add. Sense: Changed operating definition
Mar 15 10:36:38 emsi-02 kernel: [320343.560958] sd 2:0:0:0: Warning! Received an indication that the operating parameters on this target have changed. The Linux SCSI layer does not automatically adjust these parameters.
Mar 15 10:36:38 emsi-02 Hyper-V VSS: VSS: op=THAW: succeeded
Mar 15 10:37:08 emsi-02 kernel: [320373.536208] sd 2:0:0:0: [storvsc] Sense Key : Unit Attention [current]
Mar 15 10:37:08 emsi-02 kernel: [320373.536222] sd 2:0:0:0: [storvsc] Add. Sense: Changed operating definition
Mar 15 10:37:08 emsi-02 kernel: [320373.536287] sd 2:0:0:0: Warning! Received an indication that the operating parameters on thi

and then later on:

[Wed Mar 16 10:06:45 2016] sd 2:0:0:0: [storvsc] Sense Key : Unit Attention [current]
[Wed Mar 16 10:06:45 2016] sd 2:0:0:0: [storvsc] Add. Sense: Changed operating definition
[Wed Mar 16 10:06:45 2016] sd 2:0:0:0: Warning! Received an indication that the operating parameters on this target have changed. The Linux SCSI layer does not automatically adjust these parameters.
[Wed Mar 16 10:08:12 2016] sd 2:0:0:0: [storvsc] Sense Key : Unit Attention [current]
[Wed Mar 16 10:08:12 2016] sd 2:0:0:0: [storvsc] Add. Sense: Changed operating definition
[Wed Mar 16 10:08:12 2016] sd 2:0:0:0: Warning! Received an indication that the operating parameters on this target have changed. The Linux SCSI layer does not automatically adjust these parameters.
[Wed Mar 16 10:08:12 2016] blk_update_request: I/O error, dev sda, sector 1061736
[Wed Mar 16 10:08:12 2016] Aborting journal on device sda1-8.
[Wed Mar 16 10:08:12 2016] EXT4-fs error (device sda1): ext4_journal_check_start:56:
[Wed Mar 16 10:08:12 2016] EXT4-fs error (device sda1): ext4_journal_check_start:56: Detected aborted journal
[Wed Mar 16 10:08:12 2016] EXT4-fs (sda1): Remounting filesystem read-only
[Wed Mar 16 10:08:12 2016] EXT4-fs error (device sda1): ext4_journal_check_start:56: Detected aborted journal
[Wed Mar 16 10:08:12 2016] EXT4-fs error (device sda1): ext4_journal_check_start:56: Detected aborted journal
[Wed Mar 16 10:08:12 2016] Detected aborted journal
[Wed Mar 16 10:08:12 2016] EXT4-fs error (device sda1) in ext4_writepages:2421: IO failure