[Info-vax] Attempt to shadow IDE disk hangs DS10L

[Tom Wade]

Hello,

I first saw this on a customer site, and reproduced it on a test DS10L system.

OpenVMS Alpha 8.3, with UPDATE 13 (which includes SHADOWING 6) & PCSI  patches installed.  1 GB 
memory plus 18 GB IDE internal drive. OpenVMS was installed freshly from the CD.

The system boots fine unless shadowing is enabled.  The parameters were set:

SHADOWING=2
SHADOW_SYS_DISK=1
SHADOW_SYS_UNIT=0

Attempting to boot gets as far as the OpenVMS copyright banner, and then hangs.  No disk activity 
(observed on LED) after that.

If I CRASH the system, I get a dump which shows unit DSA0 has been formed.  The only process is 
SWAPPER, and I did notice there was no free paged dynamic memory (no lock data was available, and no 
page files were mapped, despite there being one on the disk).  Multiplying PAGEDYN by a factor of 10 
and an AUTOGEN made no difference.

The system is not clustered, and OPENVMS-ALPHA & VOLSHAD PAKs are loaded.

Has anyone seen anything like this, or can suggest a line of investigation ?

Regards

Tom Wade