The exact steps to stop host I/O operations depend on the host operating
system and the configuration, which are beyond the scope of these
instructions. If you are not sure how to stop host I/O operations in your
environment, consider shutting down the host. . If the storage array
participates in a mirroring relationship, stop all host I/O operations on the
secondary storage array.
Possible data loss — If you continue this procedure while I/O operations are
occurring, the host application might lose data because the storage array will not
be accessible.
1.
Wait for any data in cache memory to be written to the drives.
The green Cache Active LED on the back of each controller is on when cached data needs to
be written to the drives. You must wait for this LED to turn off.
(1) Cache Active LED
2.
From the Home page of ThinkSystem System Manager, select View Operations in Progress.
3.
Wait for all operations to complete before continuing with the next step.
4.
Power off the shelves, using one of the following procedures:
◦ If you are replacing a drawer in a shelf with Drawer Loss Protection: There is NO need to
power off any of the shelves. You can perform the replace procedure while the drive drawer
is online, because the Set Drawer Service Action Allowed Indicator CLI command
completed successfully.
◦ If you are replacing a drawer in a controller shelf without Drawer Loss Protection:
a.
Turn off both power switches on the controller shelf.
b.
Wait for all LEDs on the controller shelf to go dark.
◦ If you are replacing a drawer in an expansion drive shelf without Drawer Loss Protection:
a.
Turn off both power switches on the controller shelf.
b.
Wait for all LEDs on the controller shelf to go dark.
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