DEC Digital Alpha VME 4/224 User Manual page 354

exer
5. >>> exer -eb 64 -bc 4 -a '?w-Rc' dka0
A destructive write test over block numbers 0 through 100 on disk
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 from
buffer1
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 through 5 until enough packets have been written to
satisfy the length requirement of 101 blocks.
6. >>> exer -a '?r-w-Rc' dka0
A nondestructive 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 0x5as 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.
8. Repeat the above steps until each block on the disk has been written once
and read twice.
13–46 Console Commands
(contains the previously read data) to the current
dka0 . The