ZiLOG System 8000 - Page 282

HRM
TEST NAME:
Zilog
HRM
SMDTEST two write-read-compare
single-sector disk accesses and
transfers.
PARAMETERS:
tests of random
random-length disk
Parameter 1 = disk unit to be tested (Default: unit =
0). The range of valid unit numbers is 0 - 3.
Parameter 2 = test to be performed. (Default: testnum
= 1). If testnum = 1, the random single-sector seek
test is done. If testnum = 2, the random-length disk
transfer test is done.
DESCRIPTION:
Before the test begins, SMDTEST goes through the
start-up sequence described in the INTRODUCTION TO SMD
DIAGNOSTICS. Any errors during that procedure cause
SMDTEST to abort.
SMDTEST is actually a pair of random tests. Which test
is performed during any invocation of SMDTEST depends
upon the value of P?rameter 2.
TEST 1:
The single-sector ~est is a good test of random seeks.
Initially, a queue is formed of 128 elements. Each
element is initialized to a random,· unique disk"
address. Associated with each queue element is a
unique source buffer and a unique destination buffer.
The source buffers are initialized with random data.
Each lap proceeds as follows:
]) For each of the 128 queue elements, the source
buffer for that element is written to the disk
address. This is a single-sector write.
2) For each of the 128 queue elements:
a) the sector address is read into the destina-
tion buffer associated with that queue ele-
ment~
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Zilog
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