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1st ed., 6/30/04 - 312579601

 1. Merging multi-host HSC SMF records impacts the LSM ARM USE statistic as 

described above. However, not merging multi-host HSC SMF records affects the 
number of pass-thrus reported, as this is only the number of pass-thru operations 
occurring during the hosts LMU interval. 

 2. LSM ARM USE should never be reported higher than 100 percent. If the LSM is 

overlapping operations the arm is still only busy for 1 second even though it may be 
moving two cartridges during that 1 second time period. 

 3. The raw SMF record contains counts of pass-thru operations for each master 

pass-thru port of an LSM. The ACS section totals this information for its pass-thru 
count. 

 4. The ACS section of the Activities Report only processes the LMU statistics buffer 

data block SMF record (subtype 4). LMU statistics buffer records contain 
information calculated and returned by the LMU every HSC SMF interval. When 
attempting to understand ACS performance it may be worthwhile to decrease the 
HSC SMF interval so the HSC SMF records describe finer intervals of time (refer to 
‘‘Adding SMF Parameters’’ in the HSC Installation Guide).

 5. Depending on the 9740 microcode level, 9740 LSMs may display zeroes for LSM 

arm use percentage and pass-thru statistics.  Additionally, the SLSSLSB SMF record 
(refer to “SLSSLSB” on page 513) will contain zeroes in the LMU ATHS Statistics 
Buffer entries, and the SLSSLLG6 LOGREC record (refer to “SLSSLLG6” on page 
548) will not write robotics motion and soft fail counts for 9740s.

 Figure 9 on page 197 is an example of a typical Activities report.