Let’s start with the basics - the Storage Area Network, or SAN, is a collection of computers and storage devices. A SAN permits storage devices attached to it be used by servers attached to it. You use the SAN to protect your data and the servers are peripheral to the data that’s stored in this network. The data itself is what is important to you. If you lose a server, yes, that’s sad. But if you lose your data, or access to your data - that’s a catastrophe!
Remember that your data will be transmitted over your SAN fiber cables. What do you need to look at and know about when choosing your SAN fiber cables? Time and money has been spent researching the requirements of the SAN device. Don’t leave the connectivity portion to chance. You can’t afford downtime due to the cabling.
We recommend following the TIA-942 design standard of structured cabling to manage your cabling system. A structured cabling system will help reduce cabling bulk, which will help with airflow congestion and allow for modularity. However, this does add more interconnects. When you add more interconnects, you add more loss.
In addition to this, as data speeds are increasing and loss budgets are decreasing, you still need to have guaranteed optical performance – every time. Exceeding optical loss budgets will lead to channel errors and possibly downtime. Because you can't risk downtime, you need to use cables that won’t exceed loss budgets.
How can you be confident in the loss budgets of your cables and trunks? Make sure they exceed industry standards, not meet – EXCEED! Look for maximum loss ( not typical). The CABLExpress maximum dB loss at 0.25 per MTP® well exceeds the industry standard. Most SAN fiber systems will need to be under 1.5dB to obtain the required distances. Demand documentation from your cabling vendor.
For more information check out this short video:
Tutorial Video #30 - Data Center Cabling is an Investment Not a Cost.