The Disk Activity section of the component report shows the average disk activity per hour and the disk capacity for each disk.
The values that display in the report header reflect the configuration metrics obtained from the QAPMCONF file when the collection started. These values might change for each interval within a collection period due to dynamic changes in logical partition configuration.
A plus sign (+) displays next to the Unit column to identify multipath disk units. A multipath disk unit is a unit that has multiple redundant paths from the system to the disk unit.
Component Report 10/03/03 13:54:29 Disk Activity Page 1 Multipath disk data Member . . . : Q119115948 Model/Serial . : 840/10-3A6HM
Main storage . . : 1024.0 GB Started . . . . : 04/29/03 11:59:48 Library . . : MPLIB System name . . :ABSYSTEM
Version/Release : 5/ 3.0 Stopped . . . . : 04/30/03 00:00:00 Partition ID : 001 Feature Code . :23FE-2420-1546
Int Threshold . : 10.00 %
Virtual Processors: 4 Processor Units : 4.0 ---------- Average Disk Activity Per Hour ----------- ------ Cache hit Statistics ----- %Write Srv -------------- Disk Arm Seek Distance --------------- Device Controller Write EACS EACS Cache -Disk Capacity-
Unit Util Time 0 1/12 1/6 1/3 2/3 >2/3 Read Read Effic Read Resp Overruns MB Percent ---- ---- ----- -------- -------- -------- -------- -------- -------- ------ ---------- ----- ---- ---- -------- ------- -------
0001 .1 .0346 516 564 8 111 0 0 23.0 25.6 86.1 .0 .0 .0 5,164 60.1 0002 .0 .0000 67 397 43 76 0 0 30.9 63.4 80.8 .0 .0 .0 5,463 63.6 0003 .1 .0189 228 388 96 93 10 6 38.9 57.1 81.2 .0 .0 .0 5,463 63.6 + 0004 .0 .0000 0 0 0 0 0 0 .0 .0 .0 .0 .0 .0 8,586 99.9 + 0005 .0 .0000 0 0 0 0 0 0 .0 .0 .0 .0 .0 .0 8,586 99.9 + Multipath disk unit Column Total Average --------------------------- ---------------- ----------------
Util .0 Srv Time .0000 Disk Arm Seek Distance 0 813 1/12 1,350 1/6 148 1/3 281 2/3 10 >2/3 6 Cache hit Statistics Device Read 27.7 Controller Read 43.4 Write Efficiency 82.4 EACS Read .0 EACS Resp .0 %Write Cache Overruns .0 Disk Capacity MB 67,606 Percent 87.4 Unit -- Disk arm identifier Util -- Drive utilization Srv Time -- Average service time per request in seconds Disk Arm Seek Distance -- Average seek distance distributions per hour 0 -- Number of zero seeks 1/12 -- Number of seeks between 0 and 1/12 of the disk 1/6 -- Number of seeks between 1/12 and 1/6 of the disk 1/3 -- Number of seeks between 1/6 and 1/3 of the disk 2/3 -- Number of seeks between 1/3 and 2/3 of the disk >2/3 -- Number of seeks greater than 2/3 of the disk Cache hit Statistics --
Device Read -- Percent of device read hits for each arm Controller Read -- Percent of controller cache read hits for each arm Write Efficiency -- Percent of efficiency of write cache EACS Read -- Extended Adaptive Cache Simulator percent read hits EACS Resp -- Extended Adaptive Cache Simulator estimated percent response time improvement %Write Cache Overruns -- Percent of Write Cache Overruns Disk Capacity -- Average amount of disk space used or available MB -- Millions of bytes available on the disk Percent -- Percent of space available on the disk