2.2.37 Booting from SAN installation fails using multipath on Pure Storage FlashArray

Some systems installed with Oracle Linux 6 Update 10 and configured to use the UEK R4 kernel fail to boot if the boot disk is a multipath logical unit number (LUN) on a Pure Storage FlashArray. The system boots successfully if the LUN is exposed on a single path, or if the system is installed using Oracle Linux 6 Update 8. Note that the system also boots successfully if it is configured to use RHCK.

This issue has been replicated by using a Pure Storage FlashArray FA-420 Pure Array and a QLogic QLE2562 HBA and is still currently under investigation. (Bug IDs 26732037, 27093062).