Collect the crash dump when booting through the SAN LUN which is not accessble

NTDEV
1

Hi All,

I already posted this query in windbg forum. There is no response. Forgive me for duplicate post.

We need to collect the crash dump when we boot through the SAN LUN.(Disk less Boot - No Local Hard Disk Drive[HDD] is availble)

When booting through LUN, LUN path is down. That is the Windows Host can not find the LUN. So that we got BSOD Bugcheck Code-7B(Inaccessible boot device).

Since existing primary path(LUN) is not accessible, the crash dump creation is not completed successfully.
Is that possible to store the dump in the LUN?
Is there any other way to store the dump in some other drive ? If Yes, Please let us know the procedures/steps.

As we don’t have any alternate path to LUN. Only available path is also getting down.

At this point windows have the intelligence to store the dump in the Lost LUN??? Or any other ways to get the dump ? (because it is a server in production)

We are critically blocked because of this issue.

Thanks in Advance.

Regards,
Vignesh

2

There is a way to specify an alternate dump file location, see
DedicatedDumpFile:

https://support.microsoft.com/en-us/kb/957517

However, 0x7B happens before crash dump support initialization so there
isn’t much you can do to get a crash dump at this point. Can you attach a
kernel debugger?

-scott
OSR
@OSRDrivers

wrote in message news:xxxxx@ntdev…

Hi All,

I already posted this query in windbg forum. There is no response. Forgive
me for duplicate post.

We need to collect the crash dump when we boot through the SAN LUN.(Disk
less Boot - No Local Hard Disk Drive[HDD] is availble)

When booting through LUN, LUN path is down. That is the Windows Host can not
find the LUN. So that we got BSOD Bugcheck Code-7B(Inaccessible boot
device).

Since existing primary path(LUN) is not accessible, the crash dump creation
is not completed successfully.
Is that possible to store the dump in the LUN?
Is there any other way to store the dump in some other drive ? If Yes,
Please let us know the procedures/steps.

As we don’t have any alternate path to LUN. Only available path is also
getting down.

At this point windows have the intelligence to store the dump in the Lost
LUN??? Or any other ways to get the dump ? (because it is a server in
production)

We are critically blocked because of this issue.

Thanks in Advance.

Regards,
Vignesh