I would appreciate any comments on my configuration. My server has two double network cards. Each one has the two ports teamed so that they look like one card. I am using one of the cards for general access to the server on our normal 192.168.0 subnet. With the other card, I have plugged it directly into the N5200Pro (not via the switch) and its on 192.168.10. I thought that this would be better as the ISCSI data will now not go via the switch and will not bump into other traffic. I was also planning to aggregate the links on the N5200Pro.
I guess my questions are :
1. Is it better to plug directly rather than go through a switch? 2. Is Link aggregation going to help at all? 3. Would it be faster to plug the box in as a USB2 device?
The obvious disadvantage of this is that no other server can use space.
Anyway, I would very much appreciate any comment as it is beyond my capabilities to test every configuration.
In computing, iSCSI , is an abbreviation of Internet Small Computer System Interface, an Internet Protocol (IP)-based storage networking standard for linking data storage facilities. By carrying SCSI commands over IP networks, iSCSI is used to facilitate data transfers over intranets and to manage storage over long distances. iSCSI can be used to transmit data over local area networks (LANs), wide area networks (WANs), or the Internet and can enable location-independent data storage and retrieval. The protocol allows clients (called initiators) to send SCSI commands (CDBs) to SCSI storage devices (targets) on remote servers. It is a storage area network (SAN) protocol, allowing organizations to consolidate storage into data center storage arrays while providing hosts (such as database and web servers) with the illusion of locally-attached disks. Unlike traditional Fibre Channel, which requires special-purpose cabling, iSCSI can be run over long distances using existing network infrastructure.
SAN deployments have been driven by an insatiable demand for storage and the user benefits delivered by networked storage. These benefits include efficient storage utilization through storage consolidation, the ability to manage more storage capacity, rapid deployment of new storage, higher availability, and faster backup and restore operations. With the recent development of the iSCSI protocol and silicon-based TCP/IP offload engines, SANs based on IP networks are now possible. The IP networking infrastructure includes multi-gigabit networks, sophisticated bandwidth allocation and network management tools, and the ubiquitous reach of IP and Ethernet. These factors together enable new IP Storage solutions, using the iSCSI protocol. 1500 bytes. This is the standard size for Ethernet frames and is the default value in the iSCSI HBA. If you configure an iSCSI HBA to use an MTU of 1500, you do not need to be concerned about Ethernet switch MTU compatibility. 9000 bytes. An industry term for frames larger than 1500 bytes is 'jumbo frames'. If you configure an iSCSI HBA to use an MTU of 9000, you must ensure that all network equipment involved, such as switches, is capable of handling an MTU of at least 9000 and is configured to do so. If this condition is not satisfied, the xSeries or blade may fail to boot (typically with only a blinking cursor on the xSeries or blade console).