Specifications

Fabric OS Commands
674 Fabric OS Version 3.1.x/4.1.x Reference Guide
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.
ramTest