StorageTek 6 LMU Switchover Messages, After an LMU Switch Occurs, HSC/LMU Software Combinations

LMU Switchover Messages

The HSC Messages and Codes Guide contains all the messages appropriate to the LMU switchover process.

After an LMU Switch Occurs

After a switch of LMUs occurs and the LSMs have finished quick initialization procedures, all cartridge motion requests are re-driven and completed. If a motion request cannot be completed, the cartridge in question is made errant.

Note: ENter and EJect operations may need to be restarted after a switchover.

HSC/LMU Software Combinations

Table 4 describes the various possible combinations of HSC software with LMU microcode and installed hardware. The table indicates valid combinations.

Table 4. HSC/LMU Validity Matrix

HSC	LMU	Number of	Valid
		LMUs Powered		Functionality Available
Version	Version		Combination
		Up
		1	Yes	New HSC features are available. Dual LMU
				can be configured*, but switchover cannot
1.2 +	3.2			occur.
ECap SPE
		2	Yes	New HSC features are available. Dual LMU
				must be configured*. Switchover can be
				automated.
		1	Yes	New HSC features are available. Dual LMU
				can be configured*, but switchover cannot
1.2 or later	3.6 or later			occur.
		2	Yes	New HSC features are available. Dual LMU
				must be configured*. Switchover can be
				automated.
		1	Yes	New HSC features are available. Dual LMU
				can be configured*, but switchover cannot
2.0 or later	9315/30 1.0			occur.
	or later.
		2	Yes	New HSC features are available. Dual
				LMU must be configured*. Switchover can
				be automated.

* Configuration of dual LMU is done by a StorageTek Customer Services Engineer (CSE).

Chapter 2. Host Software Component Functions 67

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