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Cisco UCS server Blades keep crashing

Swapped from HP ProLiant BL460c G7 to UCS blades UCSB-B200-M3 Specs: UCS blades 384GB RAM; E5-2690 @2.9GHz x2CPU.
However this is happened 3rd time after shutdown or restart the server doesn't come back up.  Boot MGR error.  We opened the case with Cisco and they have no clue also.
Twice happened after a normal shutdown.  Once after applying MS patches and reboot.

Anyone have the same experience with UCS servers?
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Tiras25
Asked:
Tiras25
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3 Solutions
 
Ryan McCauleyData and Analytics ManagerCommented:
We have UCS blades and haven't had this issue - are you booting from local storage or from SAN-attached storage? Also, how many blades do you have, and do you see this issue with all the blades, or just some of them? Any difference on OS between the blades and do/don't see this issue (or among all the ones that do)?
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Tiras25Author Commented:
Booting from SAN-attached storage.  

I just bought 5 and 3 of them have issues.  No OS differences.
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Ryan McCauleyData and Analytics ManagerCommented:
I checked with our SA group, and we boot from SAN-attached storage as well - we'd talked about doing that at one point and wasn't sure if it had actually been configured, but we're not having any issues like what you're mentioning. I assume all the configuration is the same between the nodes that do have the problem and those that don't? Any potential difference in how the hardware is set up or connected to the SAN?

Also, if they're identical hardware configuration and you're booting from SAN, what happens if you swap the boot LUNs between two nodes - one that's having the problem and one that isn't? Does the problem stay with the hardware, or does it follow the boot LUN?
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Tiras25Author Commented:
Yes configs are the same and no differences in hardware.
I tried multiple times to replicate again and no luck.  Weird.  Tried with files copying restart same time, nothing.  Comes right back in.
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Ryan McCauleyData and Analytics ManagerCommented:
Can you swap the boot LUNs between a working a non-working server? If you try to boot on a working server with the hard drive image from a bad server, what happens?
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Tiras25Author Commented:
The issue is intermittent. Nothing is crashing at the moment.  However, I am not comfortable going into production with UCS blades now.
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Tiras25Author Commented:
Thanks all for trying.
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