[  467.288815] loop0: detected capacity change from 0 to 4096000
[  480.051944] loop1: detected capacity change from 0 to 4096000
[  492.680096] loop2: detected capacity change from 0 to 4096000
[  505.466021] loop3: detected capacity change from 0 to 4096000
[  517.955262] device-mapper: raid: Loading target version 1.15.1
[  520.165382] device-mapper: raid: Superblocks created for new raid set
[  520.167182] md/raid1:mdX: not clean -- starting background reconstruction
[  520.167206] md/raid1:mdX: active with 4 out of 4 mirrors
[  520.469048] mdX: bitmap file is out of date, doing full recovery
[  520.579970] md: resync of RAID array mdX
[  525.187447] md: mdX: resync interrupted.
[  527.205470] device-mapper: raid: Superblocks created for new raid set
[  527.207650] md/raid:mdX: not clean -- starting background reconstruction
[  527.207741] md/raid:mdX: device dm-1 operational as raid disk 0
[  527.207772] md/raid:mdX: device dm-3 operational as raid disk 1
[  527.207800] md/raid:mdX: device dm-5 operational as raid disk 2
[  527.207841] md/raid:mdX: device dm-7 operational as raid disk 3
[  527.208511] md/raid:mdX: raid level 5 active with 4 out of 4 devices, algorithm 2
[  527.290219] device-mapper: raid: raid456 discard support disabled due to discard_zeroes_data uncertainty.
[  527.290264] device-mapper: raid: Set dm-raid.devices_handle_discard_safely=Y to override.
[  527.410500] mdX: bitmap file is out of date, doing full recovery
[  527.488858] md: resync of RAID array mdX
[  528.213995] md: mdX: resync interrupted.
[  530.255805] device-mapper: raid: Superblocks created for new raid set
[  530.257938] md/raid10:mdX: not clean -- starting background reconstruction
[  530.257955] md/raid10:mdX: active with 4 out of 4 devices
[  530.468895] mdX: bitmap file is out of date, doing full recovery
[  530.556264] md: resync of RAID array mdX
[  531.530348] md: mdX: resync interrupted.
[  533.720564] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 2 prio class 2