VM has probably corrupted own IDE disk

[Ivan Gersi]

I have one VM..there is win DC server and server is working correctly.
I`d like to change array in this node (ssd for sas) and array will be destroyed. There is one disk failed in current sas array (raid6 from 8 disks).
But...I can do nothing with this machine. I can`t backup, I can`t migrate, I can`t copy this file to another array.
Examples:

2022-09-20 18:41:35 starting migration of VM 127 to node 'pve2' (192.168.3.78)
2022-09-20 18:41:36 found local disk 'backup:127/vm-127-disk-0.qcow2' (via storage)
2022-09-20 18:41:36 found local disk 'local:127/vm-127-disk-0.qcow2' (in current VM config)
2022-09-20 18:41:36 copying disk images
cannot import format raw+size into a file of format qcow2
send/receive failed, cleaning up snapshot(s)..
2022-09-20 18:41:37 ERROR: Failed to sync data - command 'set -o pipefail && pvesm export backup:127/vm-127-disk-0.qcow2 raw+size - -with-snapshots 0 | /usr/bin/ssh -e none -o 'BatchMode=yes' -o 'HostKeyAlias=pve2' root@192.168.3.78 -- pvesm import backup:127/vm-127-disk-0.qcow2 raw+size - -with-snapshots 0' failed: exit code 255
2022-09-20 18:41:37 aborting phase 1 - cleanup resources
2022-09-20 18:41:37 ERROR: found stale volume copy 'backup:127/vm-127-disk-0.qcow2' on node 'pve2'
2022-09-20 18:41:37 ERROR: migration aborted (duration 00:00:03): Failed to sync data - command 'set -o pipefail && pvesm export backup:127/vm-127-disk-0.qcow2 raw+size - -with-snapshots 0 | /usr/bin/ssh -e none -o 'BatchMode=yes' -o 'HostKeyAlias=pve2' root@192.168.3.78 -- pvesm import backup:127/vm-127-disk-0.qcow2 raw+size - -with-snapshots 0' failed: exit code 255
TASK ERROR: migration aborted

Of course there is not stale copy in pve2 but this script make 127 dir and 5MB vm-127-disk-0.qcow2 file in the pve2. If I deleted this dir and run script again there is the same result....5MB qcow2 file instead 32GB.
It seems the original qcow2 file in pve4 is corrupted. But windows server can run from this file.
Backup example.

INFO: starting new backup job: vzdump 127 --mode snapshot --storage backup --node pve4 --remove 0 --compress lzo
INFO: Starting Backup of VM 127 (qemu)
INFO: Backup started at 2022-09-20 18:46:06
INFO: status = running
INFO: update VM 127: -lock backup
INFO: VM Name: DC03
INFO: include disk 'ide0' 'local:127/vm-127-disk-0.qcow2' 32G
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating archive '/mnt/pve/backup/dump/vzdump-qemu-127-2022_09_20-18_46_06.vma.lzo'
INFO: started backup task 'cdb62a0c-1114-455e-a6eb-bf9cb6b7b0c4'
INFO: status: 0% (5898240/34359738368), sparse 0% (5193728), duration 1, read/write 5/0 MB/s
ERROR: job failed with err -5 - Input/output error
INFO: aborting backup job
ERROR: Backup of VM 127 failed - job failed with err -5 - Input/output error
INFO: Failed at 2022-09-20 18:46:09
INFO: Backup job finished with errors
TASK ERROR: job errors

again only 5MB transfered
or copy error

root@pve4:/var/lib/vz/images/127# cp vm-127-disk-0.qcow2 /ssd/images/127
cp: error reading 'vm-127-disk-0.qcow2': Input/output error

I think VM file must be corrupted but VM 127 runnig correctly.
Is here a way to fix it?