Iscsi Cable Types

Scsi uses three different signaling types single ended se differential hvd or high voltage differential and lvd or low voltage differential.

Iscsi cable types.

It allows fibre channel frames to be encapsulated over ethernet networks. Iscsi is the scsi protocol mapped to tcp ip and run over standard ethernet technologies. Small computer system interface scsi ˈ s k ʌ z i skuz ee is a set of standards for physically connecting and transferring data between computers and peripheral devices the scsi standards define commands protocols electrical optical and logical interfaces scsi is most commonly used for hard disk drives and tape drives but it can connect a wide range of other devices including. Since 10gbps iscsi can take either an optical cable or twinax form it is important to determine which type is best to be used in the data center and double check that the compatible technology of the cables sfp have been ordered before the day of the install.

The physical cable really does not make a difference to the protocols that run on top of it. It provides block level access to storage devices by carrying scsi commands over a tcp ip network. There are many different ways to cable the network the iscsi configuration could even be added to an existing ethernet network. Much more info on scsi cable lengths and gotchas below the chart sta scsi trade association endorsed terms terminology for scsi parallel interface technology.

Parallel scsi and serial attached scsi sas are technologies designed to be inside a box such as das or within a storage array. The scsi types bus lengths devices supported etc. See here for term descriptions. The most important things to remember when selecting your scsi cable is the type of connector required by your devices and the location of the cable either internal or external.

As i mentioned on twitter i d be careful using the cabling types as a differentiator between protocols. All the possibilities won t be covered here. There are a couple of important considerations that must be observed when cabling the iscsi configuration. Iscsi is used to facilitate data transfers over intranets and to manage storage.

While iscsi is a more mature technology to provide block level access to storage devices by carrying scsi commands over standard tcp ip ethernet. In computing iscsi ˈ aɪ s k ʌ z i eye skuz ee is an acronym for internet small computer systems interface an internet protocol ip based storage networking standard for linking data storage facilities.