My update:
It looks the issue is somehow related to the backup, but I tend to think there is a bug somewhere in the storvsc driver code -- it's very hard to track it down because before the ext4 read-only issue happens, the ext4 file system may have been somewhat corrupted.
My update:
It looks the issue is somehow related to the backup, but I tend to think there is a bug somewhere in the storvsc driver code -- it's very hard to track it down because before the ext4 read-only issue happens, the ext4 file system may have been somewhat corrupted.