I banged on this for weeks with my Red Hat TAM and we never got it to
work properly in RHEL5.2. We still have a ticket open about it; they're
targeting RHEL6 for the fix, IIRC.
One caveat: We have a bit of a unique situation in that the primary NIC
(eth0) was *not* the iSCSI NIC; rather we had to be able to bring up
eth1 on a private network to connect to the iSCSI shelf via a different
switch. We never tried using the primary interface to do this, since in
our environment, SAN traffic is not allowed to share the network with
the other traffic.
Paul Krizak 7171 Southwest Pkwy MS B400.2B
Senior Systems Engineer Austin, TX 78735
Advanced Micro Devices Desk: (512) 602-8775
Linux/Unix Systems Engineering Cell: (512) 791-0686
Silicon Design Division Fax: (512) 602-0468
Pasi Kärkkäinen wrote:
On Wed, Jul 22, 2009 at 11:13:06PM -0500, Chris Adams wrote:
Once upon a time, Paul Krizak <[email protected]> said:
iSCSI boot enablement != iSCSI HBA. All that will do is allow your NIC
to mount an iSCSI device as a boot drive and load the first few blocks
from it (i.e. a bootloader). When the kernel actually loads into memory
and boots, it will need to be able to do the following before it can
actually load the OS past the initrd:
1. Start up the NIC
2. Run DHCP (or set a static IP)
3. Load the iSCSI daemon
4. Initiate a connection to the iSCSI shelf which should create
/dev/<something> (I think...been a while since I did iSCSI)
5. Mount the iSCSI LUN (/dev/something) as root.
IIRC that is all handled already by the RHEL mkinitrd, and doesn't
require specialized (and usually more expensive) hardware and drivers.
Yes, RHEL supports taking care of that automatically. Also that's where iBFT
helps.
I think RHEL5 can do that automatically with iBFT, and without iBFT, but then
you have to
configure the boot iSCSI LUN settings twice - first to BIOS/NIC, and then to
RHEL (installer).
-- Pasi
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