HP EML E-series Tape Libraries - Manual (Page 39)

2 Using the library
This chapter describes operating procedures for the library.
Powering on the library
1. Close the center door of the library and turn the center-door knob one-quarter turn clockwise to lock it.
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Figure 22 Closing the center door
2. At the back of the library, press the library main power switch to the I (On) position.
Enterprise Modular Library E-Series 39