When I contact Azure Support, they give this solution:
Since access to the console is not an available feature in Azure, basically you will install the problem OS disk as a data disk on a working virtual machine to fix changes to the file system configuration:
A = Original virtual machine (inaccessible virtual machine) B = New virtual machine (new Temp VM)
1) Stop Virtual Machine A through the Azure Management Portal
2) Remove VM A BUT select "save attached drives"
3) A VM B Azure Portal, , "A", " "
4) VM "B" , .
5) , "B" , , linux .
grep SCSI/var/log/kern.log(ubuntu)
6) /tempmount
df -h
mkdir /tempmount
mount /dev/sdc1 /tempmount
df –h
7) /etc,
cd /tempmount/etc/
cp fstab fstab_orig
8) , fstab, vi, nano .
vi fstab
cd /
umount /tempmount
9) VM B
10) A ( , ), , A - .
, .