IBM 7133 Series, Руководство по обслуживанию

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Front Backplane Assembly
| Note for Models 010 and 500: The front backplane assembly can be removed while the
disk drive modules at the back of the 7133 remain operational. Unless you have a
particular reason to do so, do not turn off the using system or the 7133 when removing or
installing the front backplane assembly.
|
1
Use the Link Verification service aid (see the chapter about SSA service aids in the
| SSA Adapters: User’s Guide and Maintenance Information manual) to ensure that all
SSA loops that pass through the front backplane assembly are not broken. (For
example, all external SSA cables are connected correctly; all disk drive modules
and, if required, dummy disk drive modules are installed correctly.)
If a loop is broken, repair it, then check whether you have solved the original
problem. If the problem remains, go to step 2.
|
2
If not already done, remove (Models 010 and 020) or open (Models 500 and 600)
| the front cover (see “Covers” on page 3-2).
|
3
On Models 010 and 500, ensure that the disk drive modules at the front of the 7133
| are no longer available to the using system.
| On Models 020 and 600, stop all operations on the 7133, then remove power from
| the 7133 (see “All Power” on page 3-7).
|
4
Carefully make a note of the locations of the disk drive modules and (if present)
| dummy disk drive modules that are at the front of the 7133. This action ensures
| that you reinstall the modules into their original slots. (They might not all be
| connected to the same SSA loop.) Attach identifying labels to the modules if you
| want to.
5
Remove all the disk drive modules and dummy disk drive modules from the front of
the 7133 (see “Removing a Module” on page 3-17).
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7133 Service Guide