109 lines
7.6 KiB
HTML
109 lines
7.6 KiB
HTML
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Component Report - Disk Activity" />
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<meta name="abstract" content="The Disk Activity section of the component report shows the average disk activity per hour and the disk capacity for each disk." />
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<meta name="description" content="The Disk Activity section of the component report shows the average disk activity per hour and the disk capacity for each disk." />
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<title>Component Report - Disk Activity</title>
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<body id="rzahxptcomdiskact"><a name="rzahxptcomdiskact"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Component Report - Disk Activity</h1>
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<div><p>The Disk Activity section of the component report shows the average
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disk activity per hour and the disk capacity for each disk.</p>
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<p>The values that display in the report header reflect the configuration
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metrics obtained from the QAPMCONF file when the collection started. These
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values might change for each interval within a collection period due to dynamic
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changes in logical partition configuration.</p>
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<div class="note"><span class="notetitle">Note:</span> A plus sign (+) displays next to the Unit column to identify multipath
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disk units. A multipath disk unit is a unit that has multiple redundant paths
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from the system to the disk unit.</div>
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<div class="example"><h4 class="sectiontitle">Example</h4><pre> Component Report 10/03/03 13:54:29
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Disk Activity Page 1
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Multipath disk data
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Member . . . : Q119115948 Model/Serial . : 840/10-3A6HM
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Main storage . . : 1024.0 GB Started . . . . : 04/29/03 11:59:48
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Library . . : MPLIB System name . . :ABSYSTEM
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Version/Release : 5/ 3.0 Stopped . . . . : 04/30/03 00:00:00
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Partition ID : 001 Feature Code . :23FE-2420-1546
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Int Threshold . : 10.00 %
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Virtual Processors: 4 Processor Units : 4.0
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---------- Average Disk Activity Per Hour ----------- ------ Cache hit Statistics ----- %Write
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Srv -------------- Disk Arm Seek Distance --------------- Device Controller Write EACS EACS Cache -Disk Capacity-
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Unit Util Time 0 1/12 1/6 1/3 2/3 >2/3 Read Read Effic Read Resp Overruns MB Percent
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---- ---- ----- -------- -------- -------- -------- -------- -------- ------ ---------- ----- ---- ---- -------- ------- -------
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0001 .1 .0346 516 564 8 111 0 0 23.0 25.6 86.1 .0 .0 .0 5,164 60.1
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0002 .0 .0000 67 397 43 76 0 0 30.9 63.4 80.8 .0 .0 .0 5,463 63.6
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0003 .1 .0189 228 388 96 93 10 6 38.9 57.1 81.2 .0 .0 .0 5,463 63.6
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+ 0004 .0 .0000 0 0 0 0 0 0 .0 .0 .0 .0 .0 .0 8,586 99.9
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+ 0005 .0 .0000 0 0 0 0 0 0 .0 .0 .0 .0 .0 .0 8,586 99.9
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+ Multipath disk unit
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Column Total Average
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--------------------------- ---------------- ----------------
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Util .0
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Srv Time .0000
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Disk Arm Seek Distance
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0 813
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1/12 1,350
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1/6 148
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1/3 281
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2/3 10
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>2/3 6
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Cache hit Statistics
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Device Read 27.7
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Controller Read 43.4
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Write Efficiency 82.4
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EACS Read .0
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EACS Resp .0
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%Write Cache Overruns .0
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Disk Capacity
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MB 67,606
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Percent 87.4
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Unit -- Disk arm identifier
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Util -- Drive utilization
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Srv Time -- Average service time per request in seconds
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Disk Arm Seek Distance -- Average seek distance distributions per hour
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0 -- Number of zero seeks
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1/12 -- Number of seeks between 0 and 1/12 of the disk
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1/6 -- Number of seeks between 1/12 and 1/6 of the disk
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1/3 -- Number of seeks between 1/6 and 1/3 of the disk
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2/3 -- Number of seeks between 1/3 and 2/3 of the disk
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>2/3 -- Number of seeks greater than 2/3 of the disk
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Cache hit Statistics --
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Device Read -- Percent of device read hits for each arm
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Controller Read -- Percent of controller cache read hits for each arm
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Write Efficiency -- Percent of efficiency of write cache
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EACS Read -- Extended Adaptive Cache Simulator percent read hits
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EACS Resp -- Extended Adaptive Cache Simulator estimated percent response time improvement
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%Write Cache Overruns -- Percent of Write Cache Overruns
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Disk Capacity -- Average amount of disk space used or available
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MB -- Millions of bytes available on the disk
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Percent -- Percent of space available on the disk</pre>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzahxreportperftools.htm" title="Performance Tools reports provide information on data that has been collected over time. Use these reports to get additional information about the performance and use of system resources.">Performance Tools reports</a></div>
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