EMC QLA23xx, QLA22xx manual Boot Crashdump, Save to Disk, Behavior

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Configuring an EMC Boot Device

Boot Crashdump	If you system is configured to write crashdumps after system failures,
Save to Disk	and the host is configured to boot from the array, you will be able to
Behavior	successfully save the crashdump only on the original available boot
	device path on which the system started. This is a Windows
	limitation, and installing PowerPath will not affect this behavior. At
	the time a system crash is to be written to disk, Windows has already
	saved the original boot path, and PowerPath cannot redirect the
	crashdump file (MEMORY.DMP) to an alternative available device. If
	you have a configuration for which you want to capture a
	crashdump, you should ensure that the original primary boot path is
	available at the time of the crash.

3-4 EMC Fibre Channel with QLogic HBAs in Windows Hosts