Bypassed Physical Disk

What Caused the Problem?

The EMM has reported that the physical disk has been bypassed to maintain the integrity of the fibre channel loop. The Recovery Guru Details area provides specific information you will need as you follow the recovery steps.

Caution: Possible loss of data accessibility. Do not remove a component when either (1) the Service action (removal) allowed (SAA) field in the Details area of this recovery procedure is NO (), or (2) the SAA LED on the affected component is OFF (note that some products do not have SAA LEDs). Removing a component while its SAA LED is OFF may result in temporary loss of access to your data. Refer to the following Important Notes for more detail.

Caution: Electrostatic discharge can damage sensitive components. Always use proper antistatic protection when handling components. Touching components without using a proper ground may damage the equipment.

Important Notes

No data has been lost.
The physical disk may be bypassed because the physical disk is defective.
The physical disk may be bypassed because it is not capable of operating at the data rate that the fibre channel loop is currently operating. For example, a physical disk that is only capable of operating at 1 Gb/s will be bypassed if it is inserted into a expansion enclosure operating at 2 Gb/s. You can obtain the maximum and current data rates of the various fibre channel components by selecting the components button for each affected enclosure in the physical view of the Array Management Window (AMW).
The physical disk may be by-passed if the expansion enclosure contains a link (data) rate switch and it was changed while power was on. The physical disk is by-passed because it is operating at a data rate that differs from the other devices on the physical disk channel. Check the rate on the switch and then select the components button for the affected enclosure in the physical view of the Array Management Window (AMW). Compare the current data rate shown for the EMMs with the link rate switch. If they differ, then change the switch to the other rate, remove the physical disk, and then insert the physical disk back into the slot.
The physical disk may be bypassed because it is not the same physical disk technology (physical disk type) as the other physical disks in the expansion enclosure.
The physical disk status may still be optimal if the physical disk is being bypassed by only one EMM module.
When replacing a physical disk, make sure the replacement physical disk is the same or compatible model. A compatible model is one that is capable of operating at the same data rate as the physical disk it is replacing and has a capacity equal to or greater than the bypassed physical disk.
You can replace the bypassed physical disk while the storage array is performing I/O operations.
Service Action Allowed Important Information:
- The Service action (removal) allowed field in the Details area indicates whether or not you can safely remove the component. If the SAA field is NO (), then the affected component must remain in place until you service another component first.
- The Service action LED on Component field in the Details area indicates whether or not a physical SAA LED is present on the hardware component. This field does NOT indicate whether the LED is ON or OFF (that indication is provided by the Service action (removal) allowed field).
- If a component does not have an SAA LED, then it is OK to remove the component when its fault LED is lit and the Service action (removal) allowed field = YES () in the Details area.
- The Service action (removal) allowed field shown in the Details area and the physical SAA LED on the hardware component (if supported) MUST match before you remove the affected component. In rare cases (such as multiple problems), the status of the LED and the SAA field may not match. If there is a mismatch, then you should NOT remove the component until these indications match.

Recovery Steps

Check the Details area to identify the bypassed physical disk and to determine what component is bypassing the reported physical disk.

If...

Then...

A RAID controller module or physical disk component is bypassing the reported physical disk

Go to step 6.

Two EMM modules are bypassing the reported physical disk

Go to step 6.

Only one EMM module is bypassing the reported physical disk

Check the Summary area of Recovery Guru to see if there is also an EMM Configuration Settings Version Mismatch.

If...	Then...
There is an EMM Configuration Settings Version Mismatch	Follow the Recovery Guru steps to resolve that problem first.
There is not an EMM Configuration Settings Version Mismatch	There is likely a problem with the EMM that is bypassing the physical disk. Go to step 3 to collect all support data and then contact your technical support representative.

3 Select the Advanced >> Troubleshooting >> Support Data >> Collect menu option from the Array Management Window (AMW), and take the appropriate steps to save the support data to a .zip file.

Save the EMM State Capture information. You will send this to your technical support representative in a later step.

Open a Command Prompt, and type the following command:

SMcli -n <storageArray_name>;

where storageArray_name is the name of the storage array listed in the Details area.

Note: If you receive an error from this command, change your working directory to the directory that contains the SMcli executable.

Execute the following command in order to save the EMM State Capture information:

save storageArray diagnosticData esm file=?fileToSave.zip?;

where fileToSave.zip is the full directory path and name of the file you want to save.

c When the operation completes, exit the Command Prompt, and go to step 5.

5 Contact your technical support representative and indicate that a "Bypassed Physical Disk" problem is being reported by only one EMM. Send the files you saved in steps 3 and 4 to your representative and wait for further instruction. Do not continue with the remaining Recovery Steps.

6 Remove the bypassed physical disk. If the bypassed physical disk was recently used to replace another physical disk in this same physical disk slot or was inserted into an empty physical disk slot, go to step 7. Otherwise, go to step 8.

7 Check to make sure that the bypassed physical disk is appropriate for the expansion enclosure (see the Important Notes section). If the physical disk is NOT appropriate, go to step 8. Otherwise, go to step 9.

8 Obtain a replacement physical disk for the bypassed physical disk that is appropriate for the expansion enclosure (see the Important Notes section). Wait 30 seconds and then insert the new physical disk. Its fault indicator light may be lit for a short time (one minute or less). Go to step 10.

9 Wait 30 seconds and then re-insert the physical disk. Its fault indicator light may be lit for a short time (one minute or less). Go to step 10.

10 Click the Recheck button to rerun the Recovery Guru. The failure should no longer appear in the Summary area. If the failure appears again, contact your technical support representative.