46
Figure 30
Inserting an ESM
Verifying component operation
After replacing the ESM, verify that the CRU OK LED (rear panel) illuminates green, indicating that the
ESM is online/operating normally. It may take two to five minutes for the replacement ESM to become
ready.
Replacing a disk drive module
A disk drive module consists of a disk in a sled. Disk drive modules are hot-swappable, which means they
can be replaced without halting I/O to the arrays or powering off the enclosure. The new disk drive
module must be of the same type, and possess capacity equal to or greater than the one being replaced.
NOTE:
Remove the bezel to access drives and drive blanks. Reattach the bezel when finished viewing
them (see
Attaching and removing the enclosure bezel
Drive blanks
When installed, a drive blank looks like a disk drive module; however, it is an empty box used to maintain
optimal air flow for proper cooling within the enclosure. Drive blanks are installed in slots missing disk
drive modules. If you must remove a disk drive module, but cannot immediately replace it, you must either
leave the faulty module in place, or insert a drive blank in its place.
The drive blank is installed using the same procedure as
Installing a disk drive module
Similarly, the drive blank is removed using the same procedure as
Before you begin
CAUTION:
Removing a disk drive module impacts the airflow and cooling ability of the enclosure. If the
internal temperature exceeds acceptable limits, the enclosure may overheat and automatically shut down
or restart. To avoid potential overheating, wait 20 seconds to allow the internal disks to stop spinning, then
insert the new disk drive module.
See CAUTION bullets regarding “electrostatic discharge” and “anti-static protection” on
