HP StorageWorks MSA 2/8 HP StorageWorks Fabric OS V3.1.x/4.1.x Reference Guide - Page 674

Fabric OS Commands ramTest Bit write and read test of SDRAMs in the switch. Synopsis ramTest [patternSize] Availability Admin Release V3.1.x Description Use this command to verify the address and data bus of the SDRAMs that serve as CPU memory in the switch. The test consists of two subtests: 1. The address subtest verifies that SDRAM locations can be uniquely accessed. The method used is to write a unique pattern to each location in the SDRAMs. When all are written, the data is read back from each location and compared against the data previously written. A failure in the test implies that the address path between the CPU and the SDRAMs is faulty resulting in failures to program unique values. Following is the ramp pattern used in the test: 0x57626f42, 0x57626f43, 0x57626f44, 0x57626f45, ... 2. The data subtest verifies that each cell in the SDRAMs can be independently written and read, and that there are no short, stuck-at-1, or stuck-at-0 faults between data cells. 674 Fabric OS Version 3.1.x/4.1.x Reference Guide