Chapter 2. Host Software Component Functions 67
1st ed., 6/30/04 - 312579601
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
Version
LMU
Version
Number of
LMUs Powered
Up
Valid
Combination
Functionality Available
1.2 +
ECap SPE
3.2
1
Yes
New HSC features are available. Dual LMU
can be configured
*
, but switchover cannot
occur.
* Configuration of dual LMU is done by a StorageTek Customer Services Engineer (CSE).
2
Yes
New HSC features are available. Dual LMU
must be configured
*
. Switchover can be
automated.
1.2 or later
3.6 or later
1
Yes
New HSC features are available. Dual LMU
can be configured
*
, but switchover cannot
occur.
2
Yes
New HSC features are available. Dual LMU
must be configured
*
. Switchover can be
automated.
2.0 or later
9315/30 1.0
or later.
1
Yes
New HSC features are available. Dual LMU
can be configured
*
, but switchover cannot
occur.
2
Yes
New HSC features are available. Dual
LMU must be configured
*
. Switchover can
be automated.
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