User guide

exer
exer — exercise devices
Exercises one or more devices by performing read, write, and compare operations.
Optionally, reports performance statistics.
A read operation reads from a device into a buffer. A write operation writes from
a buffer to a device. A comparison operation compares the contents of the two
buffers.
The exer command uses two buffers, buffer1 and buffer2. A read or write
operation can be performed using either buffer. A compare operation uses both
buffers.
You can tailor the behavior of the exer command by using options to specify the
following:
• An address range to test within the devices
• The packet size, also known as the I/O size, which is the number of bytes read
or written in each I/O operation
• The number of passes to run
• The number of seconds to run
• A sequence of individual operations performed on the test devices. You specify
this with the action string option.
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_name1 [ device_name2 ]
Arguments
device_name1 [ device_name2 ]
Specifies the names of the devices or file streams to be exercised.
Options
-sb start_block
Specifies the starting block number (hexadecimal) within the file stream. The
default is 0.
13–40 Console Commands