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I upgraded RAM in 2 of our R610 servers. (1 has 6-SSD RAID5, the other 6-HDD RAID10) Upon restarting, the Perc H700 controller reported 1 virtual disk as expected, but then the machine would not boot. On both machines, I noticed heavy activity on the drive activity lights for several minutes. Analysis showed that zeroes had been written to the virtual disk starting from the beginning. Of course the partition table was wiped out immediately and much more data lost after that point as well. The BIOS screen just sat there and said "no boot devices present" while all this mayhem occurred.

Has anyone else run across a disaster like this? (A 3rd identical machine was upgraded with no incident) How in the world would the Perc decide to start initializing the virtual disk?

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