Compaq AlphaServer ES40, Service Manual

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4-18 Compaq AlphaServer ES40 Service Guide
7. Compare buffer1 with buffer2 and report any discrepancies.
8. Repeat the above steps until each block on the disk has been written once
and read twice.
You can tailor the behavior of exer by using options to specify the following:
•
An address range to test within the test device(s)
•
The packet size, also known as the I/O size, which is the number of bytes
read or written in one I/O operation
•
The number of passes to run
•
How many seconds to run
•
A sequence of individual operations performed on the test devices. The
qualifier is called the action string qualifier.
Syntax
exer ( [-sb start_block>] [-eb end_block>] [-p pass_count>]
[-l blocks>] [-bs block_size>] [-bc block_per_io>]
[-d1 buf1_string>] [-d2 buf2_string>] [-a action_string>]
[-sec seconds>] [-m] [-v] [-delay milliseconds>]
device_name>... )
Arguments
device_name Specifies the names of the devices or filestreams to be
exercised.
Options
-sb <start_block>
Specifies the starting block number (hex) within
filestream. The default is 0.
-eb <end_block> Specifies the ending block number (hex) within
filestream. The default is 0.
-p <pass_count> Specifies the number of passes to run the exerciser. If 0,
then run forever or until Ctrl/C. The default is 1.
-l <blocks> Specifies the number of blocks (hex) to exercise. -l has
precedence over -eb. If only reading, then specifying
neither -l nor -eb defaults to read till eof. If writing, and
neither -l nor -eb are specified then exer will write for
the size of device. The default is 1.