Proxmox full clone will not boot: A disk read error occurred

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David Fisher

Member
Nov 3, 2016
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I created a virtual machine in Proxmox which was Windows Server 2008 R2 using a raw disk format.

After installing, running updates etc & configuring the VM, I converted it into a template.

Now every time I create a full clone from this template the resulting VM will not boot. All I'm getting is a black screen with "A disk read error occurred Press Ctrl+Alt+Del to restart"

If I create a linked clone, this will work.

I don't understand what I've done wrong here, and I really don't want to start over building a new template as it took all day to get Windows updated and configured.
 
root@proxmox:/etc# pveversion -v
proxmox-ve: 4.3-66 (running kernel: 4.4.19-1-pve)
pve-manager: 4.3-1 (running version: 4.3-1/e7cdc165)
pve-kernel-4.4.19-1-pve: 4.4.19-66
lvm2: 2.02.116-pve3
corosync-pve: 2.4.0-1
libqb0: 1.0-1
pve-cluster: 4.0-46
qemu-server: 4.0-88
pve-firmware: 1.1-9
libpve-common-perl: 4.0-73
libpve-access-control: 4.0-19
libpve-storage-perl: 4.0-61
pve-libspice-server1: 0.12.8-1
vncterm: 1.2-1
pve-qemu-kvm: 2.6.1-6
pve-container: 1.0-75
pve-firewall: 2.0-29
pve-ha-manager: 1.0-35
ksm-control-daemon: 1.2-1
glusterfs-client: 3.5.2-2+deb8u2
lxc-pve: 2.0.4-1
lxcfs: 2.0.3-pve1
criu: 1.6.0-1
novnc-pve: 0.5-8
zfsutils: 0.6.5.7-pve10~bpo80



root@proxmox:/var/log/pve/tasks# cat ./B/UPID\:proxmox\:0000699E\:023FF539\:5821810B\:qmclone\:102\:root@pam\:
create full clone of drive scsi0 (data:102/base-102-disk-1.qcow2)
Formatting '/datastore/images/110/vm-110-disk-1.raw', fmt=raw size=34359738368
transferred: 0 bytes remaining: 34359738368 bytes total: 34359738368 bytes progression: 0.00 %
transferred: 388265043 bytes remaining: 33971473325 bytes total: 34359738368 bytes progression: 1.13 %
transferred: 752478270 bytes remaining: 33607260098 bytes total: 34359738368 bytes progression: 2.19 %
transferred: 1120127470 bytes remaining: 33239610898 bytes total: 34359738368 bytes progression: 3.26 %
transferred: 1484340697 bytes remaining: 32875397671 bytes total: 34359738368 bytes progression: 4.32 %
transferred: 1848553924 bytes remaining: 32511184444 bytes total: 34359738368 bytes progression: 5.38 %


transferred: 31799937859 bytes remaining: 2559800509 bytes total: 34359738368 bytes progression: 92.55 %
transferred: 32164151086 bytes remaining: 2195587282 bytes total: 34359738368 bytes progression: 93.61 %
transferred: 32528364312 bytes remaining: 1831374056 bytes total: 34359738368 bytes progression: 94.67 %
transferred: 32896013513 bytes remaining: 1463724855 bytes total: 34359738368 bytes progression: 95.74 %
transferred: 33260226740 bytes remaining: 1099511628 bytes total: 34359738368 bytes progression: 96.80 %
transferred: 33624439966 bytes remaining: 735298402 bytes total: 34359738368 bytes progression: 97.86 %
transferred: 33992089167 bytes remaining: 367649201 bytes total: 34359738368 bytes progression: 98.93 %
transferred: 34356302394 bytes remaining: 3435974 bytes total: 34359738368 bytes progression: 99.99 %
transferred: 34359738368 bytes remaining: 0 bytes total: 34359738368 bytes progression: 100.00 %
transferred: 34359738368 bytes remaining: 0 bytes total: 34359738368 bytes progression: 100.00 %
TASK OK

 
Something else interesting I noted. If I run 'file' against the clone image:


root@proxmox:/datastore/images/104# file base-104-disk-1.raw
base-104-disk-1.raw: DOS/MBR boot sector MS-MBR Windows 7 english at offset 0x163 "Invalid partition table" at offset 0x17b "Error loading operating system" at offset 0x19a "Missing operating system", disk signature 0xc56623c1; partition 1 : ID=0x7, active, start-CHS (0x0,32,33), end-CHS (0xc,223,19), startsector 2048, 204800 sectors; partition 2 : ID=0x7, start-CHS (0xc,223,20), end-CHS (0x3ff,254,63), startsector 206848, 66899968 sectors

Maybe something happened when it was converted to a template, can't explain why a linked clone works though
 
Just to add to this - I just started over creating another Win 2008 R2 machine and even if I dont convert to template first and simply clone, the clone will not boot. Looks like some problem using raw disk format on Win 2008 R2
 
David Fisher said:
Something else interesting I noted. If I run 'file' against the clone image:


root@proxmox:/datastore/images/104# file base-104-disk-1.raw
base-104-disk-1.raw: DOS/MBR boot sector MS-MBR Windows 7 english at offset 0x163 "Invalid partition table" at offset 0x17b "Error loading operating system" at offset 0x19a "Missing operating system", disk signature 0xc56623c1; partition 1 : ID=0x7, active, start-CHS (0x0,32,33), end-CHS (0xc,223,19), startsector 2048, 204800 sectors; partition 2 : ID=0x7, start-CHS (0xc,223,20), end-CHS (0x3ff,254,63), startsector 206848, 66899968 sectors

Maybe something happened when it was converted to a template, can't explain why a linked clone works though
Click to expand...

I don't think these are meaning a bad image.
Seems to be some phrases in the boot loader.
 
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