STOP 0x7b booting from iSCSI

bootiscsistoperrorwindows-server-2008

I've a Windows 2008 SBS running. It boots of iSCSI. That setup worked
for months until yesterday. I intended to reboot and gained a: STOP
0x0000007b INACCESSIBLE_BOOT_DEVICE and no idea why. My setup hasn't
changed. No new controller, no new or changed iSCSI targets, no new
Network Card or IP address changes. I had all Windows Updates on
it.
Last known good: same STOP.
Allow unsigned drivers: same STOP.
Safe mode (all variants): same STOP.
Mount target from a client: works. Filesystem check fine.
I booted of the SBS DVD but in computer repair options my target
doesn't appear. When i choose setup the target appears.
So, how can i diagnose what's going wrong? Any helpful tools? Any
hints?

Thanks in advance

Michael

Best Answer

That STOP error code usually means Windows was unable to load a proper driver for the storage controller it needs to access the OS volume, so it just gives up booting as soon as it should be relying on its own device drivers instead of BIOS.

This can happen if the boot storage controller gets changed without informing the OS, as in physically changing it with a different make/model, or configuring it to appear to the OS as something different; it's a common error if you configure a SATA controller to emulate an IDE one, install Windows using it and then change it back to full SATA mode.

Maybe something was changed in the system BIOS or iSCSI card's config?

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