What Caused the Problem?
An enclosure with redundant drive loops (channels) has lost communication through one of its loops. The enclosure has only one loop available for I/O. The Recovery Guru Details area provides specific information you will need as you follow the recovery steps.
Loss of path redundancy can result from any of the following:
Caution
Electrostatic discharge can damage sensitive components. Use a grounding wrist strap or other anti-static precautions before removing or handling components.
Important Notes
Recovery Steps
Fix any other problems reported by the Recovery Guru before attempting to fix this problem.
If...
Then...
The controllers for this Storage Subsystem are located in an enclosure containing both controllers and drives
If...
Then...
One of the controller canisters is removed
Reinsert the controller. Go to Step 7.
Both controller canisters are present
To locate the non-working channel, start with the controller canister that is associated with the working channel.
Looking at the controller canisters from the back of the enclosure, Controller A is the left controller canister and is associated with channel 1. Controller B is the right controller canister and is associated with channel 2. Go to Step 3.
The controllers for this Storage Subsystem are located in an enclosure containing only controllers
To locate the non-working channel, start with the drive mini-hub in the controller enclosure that corresponds to the working channel (refer to the labels on the back of the controller enclosure if needed). Go to Step 3.
Trace the cable from the working channel to the environmental card canister in the affected drive enclosure reported in the details area.
Caution
Do not disconnect any cables on the working channel. Doing so will cause data loss!
Locate the other environmental card canister in the affected drive enclosure and trace the cables back to the corresponding non-working channel in the drive mini-hub for the controller enclosure or the controller canister for the combination controller/drive enclosure. When tracing the cables, check the bypass lights on the environmental cards. If there is a connection problem between two enclosures, an amber loop bypass light (In Bypass or Out Bypass) is lit.
If...
Then...
There is a connection problem such as cable damage or a poor connection
Correct it and go to step 5.
There is not a connection problem
Go to step 6.
Select Recheck to rerun Recovery Guru to ensure that the problem has been fixed.
If...
Then...
The problem has been fixed
You are finished with this procedure.
The problem has not been fixed
Go to step 6.
Check the green power light on each environmental card canister along the non-working channel. If it is off, reseat the canister by removing it from the drive enclosure and waiting 10 seconds. Re-insert the canister firmly, then go to step 7.
Select Recheck to rerun Recovery Guru to ensure that the problem has been fixed.
If...
Then...
The problem has been fixed
You are finished with this procedure.
The problem has not been fixed
Contact your Customer Support Representative.