M4000 Domain 1 Jumpstart failure

 Hi all!  We have an M4000, divided into 2 domains.  We use Jumpstart for all our OS installs, and had no problem with Domain 0.  Domain 1, however, has no internal disk, so we have to boot from SAN (specifically EMC Clariion NS960).  I got LUNS allocated and started the boot process.  After some fiddling to label the LUN, I finally got it to the point where it starts writing to disk.  But, a few minutes after it starts, the server simply reboots with no errors or warnings:
        Extracted 5091.00 MB ( 82% of 6170.24 MB archrebooting...
ive)
        Extracted 5092.00 MB ( 82% of 6170.24 MB archive)
[A few more lines of MB extracted