A known issue with the Oracle ZFS SCSI storage driver causes
significant delays during Oracle VM Server boot and writes a large number
of I/O error messages to the kernel log. This issue occurs because
the storage driver loads before the SCSI device handler modules
(scsi_dh
) are available. As a result, the
system issues I/O operations to SCSI multipath devices before the
devices can handle them.
Workaround: Add the SCSI device
handler modules (scsi_dh
) to the kernel
command line parameters as follows:
Open
/etc/default/grub
for editing.Add
rdloaddriver=scsi_dh_alua
to theGRUB_CMDLINE_LINUX
line.Regenerate the GRUB2 configuration.
BIOS-based systems:
grub2-mkconfig -o /boot/grub2/grub.cfg
UEFI-based systems:
grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg
Bug 25686610