Physical Disk Channel Data Rate Detection Mismatch

What Caused the Problem?

A mismatch in data rate has been detected in the physical disk channel listed in the Recovery Guru Details area. The port has been bypassed and will not transfer any data until this problem is resolved. The Recovery Guru Details area provides specific information you will need as you follow the Recovery Steps.

Possible causes include:

An SFP in the RAID controller module enclosure does not match the data rate previously established by the physical disk channel.
An SFP in a expansion enclosure does not match the data rate previously established by the physical disk channel.
A data rate switch on a expansion enclosure is set to a speed that conflicts with the data rate previously established by the physical disk channel. Some models of expansion enclosures auto-detect the data rate, and therefore, do not have data rate switches.
There are faulty SFPs in either the RAID controller module enclosure or expansion enclosure, or there are faulty cables.

Recovery Steps

Check the Summary area of the Recovery Guru to see if a failed SFP is being reported.

If...

Then...

There is not a failed SFP being reported or the failed SFP is on a different port than what is being reported in the Details area

Go to step 2.

There is a failed SFP being reported and it is on the same port as being reported in the Details area

Fix the problem using its associated recovery guru procedure.

Go to step 7.

Refer to the Details area, and compare the Current data rate for the affected physical disk channel with the Maximum data rate for the SFP in the RAID controller module enclosure's affected port.

If...

Then...

Both data rate values match

Go to step 3.

The data rate values do NOT match

Select Storage Array >> View >> Enclosure Components >> RAID Enclosure, and then select SFP from the left pane. Record the Part number and supported data rate of the optimal SFPs.

Remove the associated SFP from the RAID controller module enclosure and insert one that matches the data rate of the storage array.

Go to step 7.

Check the SFP in the expansion enclosure that is connected to the port listed in the Details area. The SFP may be failed or may not match the data rate of the rest of the storage array.

If...

Then...

The SFP is not failed, and matches the data rate of the storage array

If...	Then...
The expansion enclosure has data rate switches	Go to step 4.
The expansion enclosure does NOT have data rate switches	Go to step 5.

There is a problem with the SFP

Replace the SFP with one that matches the storage array's data rate.

Go to step 7.

Check the data rate switches on the expansion enclosure(s) connected to the physical disk channel listed in the Details area. A data rate switch may be set to a speed that conflicts with the data rate of the RAID controller module's physical disk channel.

If...

Then...

The data rate switches match the data rate of the physical disk channel

Go to step 5.

A data rate switch does NOT match the data rate of the physical disk channel

Set the switch so that it matches the data rate of the physical disk channel.

Go to step 7.

Unplug and reconnect the cable at both ends of the port specified in the Details area. Click the Recheck button to rerun the Recovery Guru.

If...	Then...
The cables are reconnected and the problem still occurs	Go to step 5.
Reconnecting the cables fixed the problem	Go to step 7.

Replace the cable attached to the port specified in the Details area, and then go to step 6.

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.