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A disk read error occurred BOOTMGR is missing . BOOTMGR is compressed. Press Ctrl+alt
2017-07-16, 07:29
Post: #1
A disk read error occurred BOOTMGR is missing . BOOTMGR is compressed. Press Ctrl+alt
I got the message [A disk read error occurred BOOTMGR is missing . BOOTMGR is compressed. Press Ctrl+alt+Del to restart] by capturing packet with wireshark when I start up window 7 with following command:
sanboot iscsi:192.168.1.100::::iqn.1991-05.com.microsoft:joy-0001-image-target.
Then I reinstalled again, similar problem occurred again.
Hopefully, someone would like to tell me how to fix this problem.
Greatly appreciate!!!
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2017-07-18, 04:51
Post: #2
RE: A disk read error occurred BOOTMGR is missing . BOOTMGR is compressed. Press Ctrl+alt
I tried again, after i installed the OS ,I can enter the windows immediately, But after that, The same error was reported .
The iscsi server still send [a disk read error occured BOOTMGR is missing, BOOTMGR is compressed]
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2017-07-18, 16:17
Post: #3
RE: A disk read error occurred BOOTMGR is missing . BOOTMGR is compressed. Press Ctrl+alt
You should have more information then just the BOOTMGR message.

If you see that message in wireshark then that is just the contents of the packets and is no issue on it's own (it's data on disk)

Also the iSCSI server itself will never know anything about BOOTMGR.

Are you running a windows installation on a iSCSI disk via wimboot which fails on reboot?

Might help us understand your issue if you could post an image of this message.
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2017-07-19, 03:47
Post: #4
RE: A disk read error occurred BOOTMGR is missing . BOOTMGR is compressed. Press Ctrl+alt
I have installed the window7 on iscsi vhd, The first time I can enter the window fast (in 1 minute), but second time, I spent 20 minutes to enter the windw 7.

because I cant upload a picture here ,so I try to describe the issue here:
I paste the packet near the point where the error occured

3970 39.414859 192.168.1.100 192.168.1.103 iSCSI 8306 SCSI: Data In LUN: 0x00 (Read(10) Response Data) SCSI: Response LUN: 0x00 (Read(10)) (Good)
------------------------------The partial of the content of packet
A disk read error occurred
BOOTMGR is missing
BOOTMGR is compressed
Press Ctrl+Alt+Del to restart
UBOOTMGR$I30$"NTLDRff

3975 39.723519 192.168.1.100 192.168.1.103 TCP 1514 [TCP Retransmission] 3260 → 39951 [ACK] Seq=5232113 Ack=64949 Win=129792 Len=1448 TSval=58426 TSecr=80837680

3980 40.331899 192.168.1.100 192.168.1.103 TCP 1514 [TCP Retransmission] 3260 → 39951 [ACK] Seq=5232113 Ack=64949 Win=129792 Len=1448 TSval=58486 TSecr=80837680

3985 41.533023 192.168.1.100 192.168.1.103 TCP 1514 [TCP Retransmission] 3260 → 39951 [ACK] Seq=5232113 Ack=64949 Win=129792 Len=1448 TSval=58607 TSecr=80837680

3989 43.935195 192.168.1.100 192.168.1.103 TCP 1514 [TCP Retransmission] 3260 → 39951 [ACK] Seq=5232113 Ack=64949 Win=129792 Len=1448 TSval=58847 TSecr=80837680

4013 48.739599 192.168.1.100 192.168.1.103 TCP 1514 [TCP Retransmission] 3260 → 39951 [ACK] Seq=5232113 Ack=64949 Win=129792 Len=1448 TSval=59327 TSecr=80837680


------------------------ waitting here for a long time

5999 734.664511 192.168.1.103 192.168.1.100 TCP 66 39951 → 3260 [ACK] Seq=64949 Ack=5240353 Win=262144 Len=0 TSval=81546584 TSecr=58395

6000 734.664513 192.168.1.103 192.168.1.100 iSCSI 114 SCSI: Read(10) LUN: 0x00 (LBA: 0x00000000, Len: 1)

6010 734.938928 192.168.1.103 192.168.1.100 TCP 114 [TCP Retransmission] 39951 → 3260 [PSH, ACK] Seq=64949 Ack=5240353 Win=262144 Len=48 TSval=81546864 TSecr=58395

6011 735.488152 192.168.1.103 192.168.1.100 TCP 114 [TCP Retransmission] 39951 → 3260 [PSH, ACK] Seq=64949 Ack=5240353 Win=262144 Len=48 TSval=81547424 TSecr=58395

6014 736.531666 192.168.1.103 192.168.1.100 TCP 114 [TCP Retransmission] 39951 → 3260 [PSH, ACK] Seq=64949 Ack=5240353 Win=262144 Len=48 TSval=81548488 TSecr=58395

6019 738.563794 192.168.1.103 192.168.1.100 TCP 114 [TCP Retransmission] 39951 → 3260 [PSH, ACK] Seq=64949 Ack=5240353 Win=262144 Len=48 TSval=81550560 TSecr=58395

6024 742.628040 192.168.1.103 192.168.1.100 TCP 114 [TCP Retransmission] 39951 → 3260 [PSH, ACK] Seq=64949 Ack=5240353 Win=262144 Len=48 TSval=81554704 TSecr=58395

-------------------------- a new connection again
6039 749.767988 192.168.1.103 192.168.1.100 TCP 78 32597 → 3260 [SYN] Seq=0 Win=65532 Len=0 TSval=81561984 TSecr=0 SACK_PERM=1 WS=512 MSS=1460


Hopefully, The above message is helpful to analysis the problem!!!
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2017-07-19, 04:13
Post: #5
RE: A disk read error occurred BOOTMGR is missing . BOOTMGR is compressed. Press Ctrl+alt
Ok so the issue is that the boot takes 20 minutes?
There is plenty of sites where you can upload images and then add link here.

Again packet captures contains disk data NOT ERROR MESSAGES!

Which version of iPXE are you using ?

what is your full ipxe startup script? does it have set net0/gateway 0.0.0.0 ?

Have you seen http://forum.ipxe.org/showthread.php?tid=7962 ?
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2017-07-19, 09:19 (This post was last modified: 2017-07-21 04:58 by nick.)
Post: #6
RE: A disk read error occurred BOOTMGR is missing . BOOTMGR is compressed. Press Ctrl+alt
Which version of iPXE are you using ?
------------------------------------------------------------------------
I just downloaded the undionly.kpxe from http://boot.ipxe.org/undionly.kpxe
I checked the version of iPXE is 1.0.0+

what is your full ipxe startup script? does it have set net0/gateway 0.0.0.0 ?
I just input in command line as below:
iPXE> dhcp net0
iPXE> set keep-san 1
iPXE> sanboot iscsi:192.168.1.100::::iqn.1991-05.com.microsoft:joy-0001-image-target
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2017-07-21, 12:14 (This post was last modified: 2017-07-21 12:30 by nick.)
Post: #7
RE: A disk read error occurred BOOTMGR is missing . BOOTMGR is compressed. Press Ctrl+alt
I configured my DHCP as below:
[Image: ?ui=2&ik=dea61831b0&view...amp;atsh=1]

And my client loop to download undionly.kpxe file.

I also tried following command in command line:
iPXE > dhcp
iPXE > set net0/gateway 0.0.0.0
iPXE > sanboot iscsi:192.168.1.100::::iqn.1991-05.com.microsoft:joy-0001-image-target

finally, I got the same problem,20+ minutes later, I enter the windows 7.
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