After Oracle VM Kernel Upgrade, Kernel Detects Backend Disks of Hardware RAID using aacraid module
Last updated on SEPTEMBER 17, 2017
Applies to:Oracle VM - Version 3.4.2 and later
Linux OS - Version Oracle Linux 6.0 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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