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3.1
Overview
The DLTSage firmware sets TapeAlert flags that the DLTSage host software, the ISV software, and the
library controller can read independently. When a TapeAlert flag is set, it indicates that the DLTSage
firmware has determined a specific condition related to the data cartridge or the SDLT tape drive itself.
You can read these TapeAlert flags after the data cartridge is loaded, anytime during use, after an error
(Check Condition Status) is reported, and you should definitely read them before unloading the data
cartridge.
This chapter provides detailed information about the SDLT tape drive firmware, TapeAlert flags,
typical host responses to TapeAlert flags, DLTSage xTalk, DLTSage iTalk, and Pocket DLTSage iTalk.
3.2
Theory of Operation
3.2.1
How DLTSage Collects Data
DLTSage uses over 2000 data collection structures to continuously monitor, accumulate, and analyze
critical tape drive and media performance parameters. These structures contain data that is collected
for each track, each segment (eight segments per track), each Magneto Resistive (MR) channel, and
each optical band.
The amount of data collected and the level of granularity allow DLTSage tape drive firmware to
differentiate between tape drive and media-related problems. If a critical operating parameter exceeds
a DLTSage threshold, the data structure—corresponding to the track, segment, MR channel, or optical
band—is marked to indicate system performance degradation.
81-81201-01 Rev A01
Features of DLTSage
Chapter 3
October 2003
C
3
HAPTER
3-1
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