Are you using MPIO?  Also, do you have the advanced options setup properly (ISCSI is not set high in the priority list, and the networking services are not enabled).  I would make sure the drivers are up to date, and the network is not having any issues.. 

From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Hadrian Baron
Sent: Thursday, January 24, 2008 2:49 PM
To: 'Glenn Walker'; toasters@mathworks.com
Subject: RE: Cleaning up Messy SW iSCSI connections

It’s software based iSCSI, so the normal gigE NIC becomes the HBA.  It sounds like a similar issue though. 

- Hadrian

From: Glenn Walker [mailto:ggwalker@mindspring.com]
Sent: Thursday, January 24, 2008 2:46 PM
To: Hadrian Baron; toasters@mathworks.com
Subject: RE: Cleaning up Messy SW iSCSI connections

Not using an HBA are you?  We had similar problems with the QLogic 4050C HBAs.  The TCP session would drop on the HBA and a reset would be required to get it going again.

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From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Hadrian Baron
Sent: Thursday, January 24, 2008 1:28 PM
To: toasters@mathworks.com
Subject: Cleaning up Messy SW iSCSI connections

Hello Toasters,

We have Snapdrive + MS iSCSI on a few boxes.  I’ve noticed that once in awhile the iSCSI connection will become unavailable.  If you browse the iSCSI front-end in Snapdrive, it will show unavailable where it would show the IP addresses for target & portal.

If you browse the iSCSI control panel, it shows a target that is “reconnecting”, but you cannot disconnect it to properly re-establish the connection.

Does anyone have a way to properly clean up these connections?   Typically disabling iSCSI / Snapdrive services, bouncing the box, and turning them up will let me re-establish, but this is painful.

If anyone is wondering, it’s Snapdrive 4.2.1 + MS iSCSI 2.05.

Thanks all,

- Hadrian