7–iSCSI Configuration
Open-iSCSI and Boot from SAN Considerations
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To overcome this limitation, perform the initial boot from SAN with the pure L2
interface (do not use hardware offloaded iSCSI) using one of the following
procedures during the boot from SAN.
To boot from SAN using a software initiator:
1.
Complete the following in the adapter's preboot device configuration:
a.
On the iSCSI Boot Configuration Menu, set
iSCSI Offload
to
Disable
.
b.
Set
HBA Mode
to
Disable
.
c.
Set
Boot Mode
to
iSCSI
.
2.
Configure the initiator and target entries.
3.
At the beginning of the installation, pass the following boot parameter with
the DUD option:
For RHEL 7.x and SLES 12.0 rd.iscsi.ibft:
No separate options are required for older distributions of RHEL and
SLES.
For FastLinQ DUD package (for example, on RHEL 7):
fastlinq-8.18.10.0-dd-rhel7u3-3.10.0_514.el7-x86_64.iso
4.
Install the OS on the target LUN.
To migrate from a non-offload interface to an offload interface:
1.
Upgrade qedi transport-supported Open-iSCSI tools such as iscsiadm,
iscsid, iscsiuio, and iscsistart.
a.
Use the following Open-iSCSI RPM package:
qlgc-open-iscsi-2.0_873.107-1.x86_64.rpm
b.
Issue the following command:
rpm -ivh qlgc-open-iscsi-2.0_873.107-1.x86_64.rpm –force
NOTE
The preceding step is required because DUDs contain qedi, which
binds to the iSCSI PF. After it is bound, open-iscsi infrastructure fails
due to unknown transport driver.