Ramtest - HP StorageWorks 8B - FC Entry Switch Reference Manual

ramTest

Bit write and read test of SDRAMs in the switch.
Synopsis
ramTest [patternSize]
Availability
admin
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
are faulty resulting in failures to program unique values.
Following is the ramp pattern used in the test:
2. The data subtest verifies that each cell in the SDRAMs can be independently written and read,
and that there is no short, stuck-at-1, or stuck-at-0 faults between data cells.
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
9 patterns:
•
•
•
•
•
•
•
•
•
Since the test requires the operating system to operate which is loaded in the same memory, 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:
patternSize Specify a number from 0 to 9 to determine the number of patterns used for the
Fabric OS Reference
0x57626f42, 0x57626f43, 0x57626f44, 0x57626f45, ...
0x55555555
0x69696969
0x3c3c3c3c
0x1e1e1e1e
0x87878787
0x14284281
0x137ffec8
0x0f0f0f0f
0x00000000
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.
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Telnet Commands
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