Hi,

within the following lines you can see the result of the current scsi-nodes

[EMAIL PROTECTED]:~# iscsiadm -m node
192.168.2.202:3260,1 iqn.2002-10.com.infortrend:raid.sn7455070.30
192.168.1.202:3260,1 iqn.2002-10.com.infortrend:raid.sn7455070.10
192.168.2.201:3260,1 iqn.2002-10.com.infortrend:raid.sn7455070.20
192.168.1.201:3260,1 iqn.2002-10.com.infortrend:raid.sn7455070.00
[EMAIL PROTECTED]:~# iscsiadm -m session
tcp: [1] 192.168.2.202:3260,1 iqn.2002-10.com.infortrend:raid.sn7455070.30
tcp: [2] 192.168.1.202:3260,1 iqn.2002-10.com.infortrend:raid.sn7455070.10
tcp: [3] 192.168.2.201:3260,1 iqn.2002-10.com.infortrend:raid.sn7455070.20
tcp: [4] 192.168.1.201:3260,1 iqn.2002-10.com.infortrend:raid.sn7455070.00

will this order allways be the same? In case of yes, I could prevent 
administration via udev -- and deal with this situation.
If not, it may be hard to map changing identifiers via udev, right?

Klemens

Am Thursday, 17. January 2008 13:51 schrieb Pasi Kärkkäinen:
> On Thu, Jan 17, 2008 at 12:03:11PM +0100, Klemens Kittan wrote:
> > Hi,
> >
> > I got a question about mapping iSCSI targets and device names.
> >
> > There exists a storage, containing 2 RAID groups. The first RAID group is
> > bound to iSCSI network channel 0 and 2, the second RAID is bound to iSCSI
> > network channel 1 and 3.
> >
> > These channels are connected by two switches, each in a separate network.
> > Switch 1 connects channel 0 and 1, switch 2 connects channel 2 and 3.
> > Thus i got redundancy, as one switch can go down and both RAIDs are still
> > available. In result, there are 4 targets -- and they all can be bound by
> > a client.
> >
> > Binding the 4 targets, these targets are mapped to scsi device names.
> > (e.g. sdb, sdc, ...)
> >
> > Now there is my question -- how can I configure the order, the targets
> > are bound into the system. In the situation right now (sda is local
> > drive) sdb is bound on target 3 (via switch 2), sdc is bound to target 1
> > (via switch 1), sdd is bound on target 2 (via switch 2), sde is bound to
> > target 0 (via switch 1).
> >
> > Why this is the order? Is this order allways the same? Can I configure
> > the order myself -- to ensure (e.g. channel 0 on sdb, channel 1 on sdc,
> > a.s.o.)?
>
> Maybe you can use /dev/disk/by-uuid/ ?
>
> Or then you can configure udev to give your iSCSI disks some fixed names..
>
> -- Pasi
>
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-- 
Klemens Kittan
Systemadministrator

Uni-Potsdam, Inst. f. Informatik
August-Bebel-Str. 89
14482 Potsdam

Tel.    :   +49-331-977/3125
Fax.    :   +49-331-977/3122
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