Specifications

ramTest
675Fabric OS Version 3.1.x/4.1.x Reference Guide
The method used is to write pattern D to location N, write the complementary
pattern D to location N+1, and then read and compare location N to location
N+1. Bump the location to test: N=N+1. Repeat the double write and read
until all locations are tested with the following patterns:
— 0x55555555
— 0x69696969
— 0x3c3c3c3c
— 0x1e1e1e1e
— 0x87878787
— 0x14284281
— 0x137ffec8
— 0x0f0f0f0f
— 0x00000000
Since the test requires the operating system to operate, it does not and cannot
test all 16 MB of the memory. Instead it tests the largest portion as given by
the OS, which is typically about 13 MB.
Operands
This command has the following operand:
Example
To run the RAM test on a switch:
patternSize Specify a number from 0 to 9 to determine the number of
patterns used for the data subtest. The default value is 0
which runs all nine patterns. A value from 1 to 9 will
execute the specified number of patterns. Any value over 9
is truncated to 9. Only the data subtest is configurable. The
address subtest is always executed. This operand is
optional.
switch:admin> ramTest
Running System DRAM Test ...... passed.