B200M3 server occasionally disconnects san

[Hungnt_sbd]

Hello,

Our customer reported that their vsphere hosts deployed on Cisco UCS unexpectedly crash (purple screen). The hosts are san booted.

We checked release notes for firmware 2.0(2r) and came across this information:

- "Fibre Channel firmware issues disconnect the SAN and cause a server outage" (CSCtz87024)

So we are planning to upgrade ucs firmware to 2.1(1a).

I have read through documents, watched videos and ready to go.

Just want to know if anyone has experienced this same problem and has resolved it by upgrading ucs firmware.

Any precaution would be great as well.

Some related information:

- UCS environment: Firmware 2.0(2r), FI 6120, B200M3 Server, Vic 1240 + Nexus 1000v

- Vsphere environment: Vsphere host 5.1, Vcenter 5.1

[Christopher Federico]

I would make sure all the paths look good going to your FC switches . You can check the logs on Brocades if your using them or MDS switches. Make sure you have primary and secondary targets in your boot policy . Check your hosts do they have Dead paths on your Fiber connections ?

When ESxi loads up ... it loads into memory . So even a disconnect might not be painful but if its trying to write to a debug log on the LUN that might cause a crash cause it cannot get there .

Just my 2 cents .

Chris