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EMC - Storage Array Error

Posted on 2014-02-12
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Last Modified: 2014-02-21
Hi there,

We have a CX3-80 and we started getting this error last week and we continuously get it a few times every day.  Any suggestions?

Time Stamp 02/12/14 14:52:36 (GMT) Event Number 71174001 Severity Warning Host CX3-PROC-A Storage Array APM00070904191 SP N/A Device N/A Description SFP Diagnostic condition "Transmit bias high warning" detected for physical port 2
 00 00 04 00 03 00 56 00 d3 04 00 00 01 40 17 a1 01 40 17 a1 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 71 17 40 01

Thanks,
- Christian
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Question by:Christian Palacios
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by:Duncan Meyers
Duncan Meyers earned 2000 total points
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That suggests that the SFP on  Port 2 on SPB is failing. You *may* also see CRC errors or similar on the matching port on the connected fibre channel switch.

I'd call it in to EMC and get the storage processor replaced. The SFP are fixed on a CX3-80, so the whole unit had to be replaced.
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by:Christian Palacios
ID: 39868828
Hi Duncan,

Thank you.  What is the SFP?  If it fails, what can/could occur?  When you mean unit, do you mean the entire CX3-80 unit, not a hot-swappable part of the CX3-80 unit??

Thanks,
- Christian
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Duncan Meyers earned 2000 total points
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SFP = Small Form-factor Pluggable - the optical transceiver module that the FC cable plugs into. Often incorrectly referred to as a GBIC (Giga Bit Interface Converter) - on a CX3-80, it's soldered onto the storage processor board.

In this case, the unit is the affected storage processor sub assembly. It's 100% hot-swappable, but I'd recommend doing the swap at a quiet time as the replacement will temporarily affect array performance - and it obviously temporarily reduces redundancy. You should perform a couple of pre-checks before swapping a storage processor board. Check that the path balancing algorithm in VMware is set correctly (should be Round Robin or MRU) and for physical hosts, check that PowerPath is happy and reporting that paths are alive. If all that checks out OK, then the hosts will cope with losing a storage processor and LUNs will fail over correctly. You could also do a pre-emptive trespass of all LUNs on the faulty storage processor to its partner. To force a trespass (this is non-disruptive), right-click on the LUN in Unisphere or Navisphere and select Trespass.
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by:Duncan Meyers
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Sorry - missed this bit: if the SFP fails, the array will continue to operate normally and whatever path balancing/path fail-over software you have will route FC frames down other paths to the arrays, but you've lost a level of redundancy and if you're working the array hard, you've potentially lost some performance too.
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