[gPXE] Will gPXE support booting from iscsi cd-rom?

[KernSafe Technology]

Hi Andrew Bobulsky,

 

>if you were to put an iSCSI HDD on LUN 0 and an iSCSI ODD on LUN 1, you'd still need to specify a second iSCSI connection 

 

I don't think it need a second iSCSI connection if you put more than one LUNs to one target, most of popular iscsi initiators suppport multiple-lun feature, all the luns use only one connection.

I think at least two things we need to do:

1, Modify int13 interrupt in gpxe and make it support CD-ROM.

2, Make target support multiple-lun.

 

Windows setup will start to boot from gpxe (A iSCSI target with hold a CD-ROM and a harddisk is already descried by ibft), and then press F6 to install a third-party iSCSI drivers.

The iSCSI drivers will prepare two devices for windows (a hard drive and a CD-ROM).

 

>By the way, is your target OS here XP/2003 setup?

Yes, I only consider windows at this time.

 

KernSafe Technology
Windows iSCSI SAN provider,
www.kernsafe.com
 


Subject: Re: [gPXE] Will gPXE support booting from iscsi cd-rom?
From: rulerof at gmail.com
Date: Tue, 25 May 2010 16:07:12 -0400
CC: gpxe at etherboot.org
To: kernsafe at hotmail.com

Aldrich,


While I read that and though it might be a clever solution, the string that you pass to the sanboot command includes the LUN you want to connect the int13 device to, which defaults to LUN 0.


So, if you were to put an iSCSI HDD on LUN 0 and an iSCSI ODD on LUN 1, you'd still need to specify a second iSCSI connection :-(


By the way, is your target OS here XP/2003 setup?


-Andrew Bobulsky



On May 24, 2010, at 10:15 PM, KernSafe Technology wrote:

Hi Shao Miller,
 
If it is reachable (modify int13), we can input a hard disk and a CD-ROM into one Target (multiple-LUN), so the workstation will get two SCSI devices from iBFT.

 
> Subject: RE: [gPXE] Will gPXE support booting from iscsi cd-rom?
> Date: Mon, 24 May 2010 12:13:55 -0400
> From: Shao.Miller at yrdsb.edu.on.ca
> To: kernsafe at hotmail.com
> CC: gpxe at etherboot.org
> 
> Good day Aldrich,
> 
> Since there's no relationship between BIOS INT 13h drive numbers and
> drives that Windows finds, how do you propose to pass a virtual optical
> disc drive (ODD) to Windows?
> 
> For the HDD case, we already pass an iBFT (for iSCSI) or an aBFT (for
> AoE). I would suggest that you either need additional data associated
> with those tables to specify ODD as the drive-type, or your initiator
> could probe the SAN and look for El Torito ISO9660 structure in order to
> dynamically determine that the SAN is an ODD.
> 
> In regards to loading all of this during setup: For Windows XP/2003
> you'll likely run into some challenges, as A! ndrew mentioned. Have you
> already found a way to use your F6-extra-drivers-floppy-disk to load
> networking for the network card along with your initiator?
> 
> - Shao Miller



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