The only way to make the TL2000 a scsi device is to remove the SAS tape drive and install a SCSI LTO3 tape drive, there is no scsi to sas bridge for that library. Since you already have the iSCSI card in the library wouldn't it be easier to just download the FREE Microsoft initiator? You can attach the TL2K bridge directly to one of the 1850 NIC's if you are not using both or just attach the bridge to any ethernet switch on your network. All of the instructions for the initiators can be found here The users guide for the bridge can be found here Once the initiator is configured to the bridge device the server will see the library as if it were direct attached.  Hope this helps, Bob   If you decide to take the iSCSI route feel free to post any questions or comments back to this thread but you may be better served posting a new thread specific for your iSCSI questions.....      
We recently purchased a dell PV TL2000 tape library.  I noticed that the TL is shipped along with a SAS controller. The box also include a iSCSI 1Gb bridge adaptor. But our file server doesnt have a SAS or iSCSI Support. Its having SCSI ultra 320. is there any compactable SCSI bridge  or SCSI controller available for this TL2000..? pls help me.  
TL2000 with SCSI 