Wednesday, September 02, 2015

Storage related problems with LSI 12Gb SAS HBA card

Our Dell field engineer experienced strange storage problems with SAS storage connected to ESXi hosts having LSI 12Gb SAS HBAs. Datastores were inaccessible after ESXi reboot, paths were temporarily unavailable, etc. In this particular case it was DELL Compellent storage with SAS front-end ports but the problem was not related to particular storage and similar issue can be experienced on other SAS storage systems like DELL PowerVault MD, etc.

He has found (thanks Google) Christopher Glemot's blog post describing other issues with LSI 12Gb SAS HBA. However the key point was that mpt3sas driver should be used and not msgpt3 driver which was on these particular ESXi hosts.

The solution is relatively easy:

  • Uninstall msgpt3 driver - esxcli software vib remove –n lsi-msgpt3
  • Download the latest mpt3sas driver (currently
  • Unpack and upload mpt3sas driver  to ESXi host
  • Install  mpt3sas driver on ESXi host - esxcli software vib install –d /path/
  • Restart ESXi host
Hope this helps.