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Attention:
v After you remove an ESM, wait at least 70 seconds before reseating or replacing
v The EXP810 ESM FRU is not the same as the EXP420 ESM FRU. The EXP420
Complete the following steps to remove a failed ESM:
116
IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User's and Maintenance Guide
the ESM so that the DS4000storage subsystem controller properly recognizes
that an ESM is removed from the configuration. Failure to do so may cause
undesired events.
ESM will be locked down when inserted in the EXP810 chassis. Verify that the
ESM FRU PN is correct before replacing an ESM.
1. Start the DS Storage Manager client program. In the Enterprise Management
window, open the Subsystem Management window for the DS4000 storage
subsystem that includes the EXP810 enclosure that requires the ESM
replacement.
2. Check the DS Storage Manager online help for ESM failure-recovery
procedures. Follow the steps provided in the failure-recovery procedures
before continuing to step 3.
3. Save the DS4000 profile by performing the following steps:
a. In the Subsystem Management Menu, select Storage Subsystem → View
→ Profile. The Storage Subsystem Profile window opens.
b. In the Storage Subsystem Profile window, click Save As. The Save Profile
window opens.
c. In the Save Profile window, select or enter the file directory and file name.
Click Save to save the profile. The Save Profile window closes.
Important: Do not store DS4000 profiles in the same location as the
logical drives that are defined on your DS4000 configuration. If you do, and
the logical drives fail, you will lose data.
d. Click Close to close the Storage Subsystem Profile window.
4. Label each cable to ensure that all cables are properly connected to the new
ESM.
5. Label the SFP modules when you remove them. You must install the SFP
modules in the same positions on the new ESM.
6. Remove the SFP modules and the fibre-channel cables from the failed ESM.
Attention:
Be careful not to bend the fibre-channel cables at a sharp angle
or pinch them with objects. This can decrease the performance or cause data
loss.
7. Squeeze the ESM latch. The ESM latch is a coral colored tab on the lever.
8. While squeezing the latch, pull the lever open 90° (so that the lever is
horizontal). Pull the lever away from the chassis to remove the ESM from the
EXP810 midplane, as shown in Figure 56 on page 117.
Note: The lever rotates upward or downward 90°, depending on whether the
ESM you are removing is in the right or left ESM bay.
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