The LSI SAS 2108 is capable of power save mode for non-active and hot spare drives. All LSI SAS 2108 fimrware versions have these 2 options for power save mode. Once the drives go into power save mode, there is a definite quieting from the server. The disk noise is not excessive but audible all the same. Hitachi 7k200 drives are known for good performance and reliability but also noise. That equals about $83.22 per year, just to keep the hard drives idle. $83 I can spend on other things like one beer a month for a year. The RAID controller will be an LSI SAS 2108 based card.Ĥ5.6w at idle may not seem like a big deal as they consume about the same as 2x energy efficient light bulbs. Over a year it ads up. Let’s say 20 hours of idle a day = 912whr per day * 365 = 332.88Kwhr per year. In NZ each kwhr = about $0.25. Since money is not growing on trees, I need to keep the power bill to a minimum. My system main storage will be: 6x 2TB Hitachi 7k2000 Hard Drives in RAID5 each using 7.6w at idle = 45.6w total, I may at some point get 2 more and go RAID6. As I’m slowly setting up my new Home Server build, I’m starting to think about the long term use of the server. Its going to be on 24/7. SAS 2108 cards can be found inexpensively as the IBM ServeRAID M5014 deal shows us. For those wondering, the LSI SAS 2108 is an 8 port SAS 6.0gbps controller that supports parity RAID functions such as RAID 5. Today we are going to look at the LSI SAS 2108 power save feature for Active and Configured drives.
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