Hi team, here's a new case.
Problem
When a storage device is directly connected to a host through optical fibers, a large number of bit errors are reported on the port on the storage device.
Symptom
Storage alarms are displayed as follows:
Cause
Customers use self-purchased single-mode optical fibers to connect storage devices and hosts.
The storage devices and hosts usually use multi-mode optical modules.
The cables do not match the modules.
As a result, the receive optical power of ports is low and bit errors are large.
Location Method
1. View the storage running data file and collect the keyword PowerReal or power(uW).
If the search result is obtained using PowerReal, check the receive power and transmit power.
The normal receive power is about 500 uW.
If the search result is displayed by using power(uW), check the receive power and transmit power.
The normal receive power is about 5000.
2. Check whether the cables used at the site are multimode fibers.
Solution
If an incorrect cable is used, replace the faulty cable.
If the cable is normal, check the peer optical module.
Post-Recovery Check
Check whether the number of bit errors on the switch continues to increase.
Check whether the receive and transmit power of the optical module is normal.
Applicability
All OceanStor series storage versions
