Product and version information:
1.We mapped two LUNs from two separate RAID groups to a Windows 2008 R2 server.
2.We then copied files to the two mapped LUNs on the server.
3.We removed a member disk from a RAID group. The RAID group and the LUN on that RAID group failed. The copy progress on the failed LUN halted.
4.The copy progress on the healthy LUN also halted.
The first test indicated that the problem was irrelevant to the UltraPath. The second and third tests indicated that the problem was irrelevant to the storage devices. The fourth and fifth tests indicated that the problem was irrelevant to specific Windows 2008 R2 hosts, but was relevant to the Windows 2008 R2 operating system. The sixth test showed that installing the SP1 failed to solve the problem.
Conclusion: The problem was due to a inherent defect in the Windows 2008 R2 operating system, and was irrelevant to storage devices.