After Oracle VM Kernel Upgrade, Kernel Detects Backend Disks of Hardware RAID using aacraid module
(Doc ID 2301437.1)
Last updated on FEBRUARY 03, 2019
Applies to:Oracle VM - Version 3.4.2 and later
Linux OS - Version Oracle Linux 6.0 and later
Oracle Cloud Infrastructure - Version N/A and later
Upgrading Oracle VM Server(OVS) kernel, root filesystems got corrupted. It is found that instead of one local disk, kernel see and create block device (sd) for 3 disks. The additional two disks are part of backend H/W RAID . Normally OS shouldn't create associated sd* devices for the backend H/W RAID disks instead it should create one sd device.
This causes OS filesystems to get mounted using any one of these disks and causes issues in H/W RAID level sync and finally it cause filesystem corruption in root filesystems.
Everything works fine with old kernel.
oracle-hmp-libs RPM is installed, then kernel is upgraded.
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