Troubleshooting and Diagnostics
Compaq ES40CSLP Rackmount System Installation/User/Service Guide 6–31
>>>exer –l 2 duc0
Read block numbers 0 and 1 from device duc0.
>>>exer –sb 1 –eb 3 –bc 4 –a ’w’ –d1 ’0x5a’ duc0
Write hex 5a’s to every byte of blocks 1, 2, and 3. The packet size is bc * bs, 4 * 512, 2048 for
all writes.
>>>ls –l du*.* dk*.*
d**.* no such file
r--- dk 0/0 0
dka0.0.0.0.0
>>>exer dk*.* -bc 10 –sec 20 -m –a ’r’
dka0.0.0.0.0 exer completed
packet IOs elapsed idle
size IOs bytes read bytes written /sec
bytes/sec seconds secs
8192 3325 27238400 0 166 1360288 20
19
>>>exer –eb 64 –bc 4 –a ’?w-Rc’ duc0
A destructive write test over block numbers 0 thru 100 on disk duc0. The packet size is 2048
bytes. The action string specifies the following sequence of operations:
1.
Set the current block address to a random block number on the disk between 0 and 97. A
four block packet starting at block numbers 98, 99, or 100 would access blocks beyond the
end of the length to be processed so 97 is the largest possible starting block address of a
packet.
2.
Write a packet of hex 5a’s from buffer1 to the current block address.
3.
Set the current block address to what it was just prior to the previous write operation.
4.
From the current block address read a packet into buffer2.
5.
Compare buffer1 with buffer2 and report any discrepancies.
6.
Repeat steps 1 thru 5 until enough packets have been written to satisfy the length
requirement of 101 blocks.
>>>exer –a ’?r-w-Rc’ duc0
A non-destructive write test with packet sizes of 512 bytes. The action string specifies the
following sequence of operations:
1.
Set the current block address to a random block number on the disk.
2.
From the current block address on the disk, read a packet into buffer1.
3.
Set the current block address to the device address where it was just before the previous
read operation occurred.
4.
Write a packet of hex 5a’s from buffer1 to the current block address.
5.
Set the current block address to what it was just prior to the previous write operation.
6.
From the current block address on the disk, read a packet into buffer2.
7.
Compare buffer1 with buffer2 and report any discrepancies.
Summary of Contents for ES40CSLP
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