The STKIOT query produces two sets of daily charts. The charts show daily host and Real Tape Drive (RTD) channel I/O for each StorageTek Virtual Tape Storage Subsystem (VTSS). One chart set shows the hourly I/O totals, with the host I/O displayed using vertical bars, and the RTD I/O shown with a vertical line. The second chart set shows the hourly host I/O for each VTSS with the I/O count for each SYSID shown with stacked vertical bars.
The top example shows the daily chart for VTSSID "VTSS4." The highest volume of host I/O activity occurred during HOUR 3, with 89.7 million channel I/Os. The peak hour for RTD I/O activity was HOUR 8, with just over 55 million I/Os.
The bottom example shows the hourly host channel I/O with the SYSID breakdown for the same VTSSID. Over most hours, VTSS activity is fairly evenly spread over the attached SYSID hosts.
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