disks not visible after OS upgrade linux

Hi All,

I have rhel 6.4 on UCS Hardware c220M3 server. there were few Luns and tape drives we were using.

Then we have upgraded UCS firmware of the server its wrking fine but after few days we did kernel and os upgrade from RHEL 6.4 to RHEL 6.6 and now we are not able to see any Luns or tape on the server. even we checked dmesg no attached disk anywhere.

Please help what could be the issue.
The RockAsked:
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Steven RomanConnect With a Mentor Commented:
Hello

Try this to rescan the scsi bus, also make sure no on e unplugged anything

echo "- - -" > /sys/class/scsi_host/host0/scan
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Duncan RoeSoftware DeveloperCommented:
Make sure you have loaded the required Linux Kernel Modules (LKMs) for your hardware. Try first the SCSI controller for your tape.
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The RockAuthor Commented:
Thanks all for your suggestion we have also opened a case with storage . Will update you all soon with feedback. For now no luck
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Duncan RoeConnect With a Mentor Software DeveloperCommented:
In the meantime, please post the output from lspci
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The RockAuthor Commented:
Thanks Duncan and Steven for your suggestion. We found the issue and solution i.e we have upgraded the NIC firmware and drivers and issue resolved. many thanks
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