Raid

I previously blogged here and here on my research into finding power saving RAID controllers. I have been using LSI MegaRAID SAS 9280-4i4e controllers in my Windows 7 workstations and LSI MegaRAID SAS 9280-8e controllers in my Windows Server 2008 R2 servers. These controllers work great, my workstations go to sleep and wake up, and in workstations and servers drives spin down when not in use. I am testing a new set of workstation and server systems running Windows 8 and Server 2012, and using the “2nd generation” PCIe 3.0 based LSI RAID controllers. I’m using LSI MegaRAID SAS 9271-8i with CacheVault and LSI MegaRAID SAS 9286CV-8eCC controllers. ...

This post continues from my last post on power saving RAID controllers. It turns out the Adaptec 5 series controllers are not that workstation friendly. I was testing with Western Digital drives; 1TB Caviar Black WD1001FALS, 2TB Caviar Green WD20EADS, and 1TB RE3 WD1002FBYS. I also wanted to test with the new 2TB RE4-GP WD2002FYPS drives, but they are on backorder. I found that the Caviar Black WD1001FALS and Caviar Green WD20EADS drives were just dropping out of the array for no apparent reason, yet they were still listed in ASM as if nothing was wrong. ...

I’ve been a longtime user of Adaptec SATA RAID cards (3805, 5805, 51245), but over the years I’ve become more energy saving conscious, and the Adaptec controllers did not support Windows power management. My workstations are normally running in the “Balanced” power mode so that they will go to sleep after an hour, but sometimes I need to run computationally intensive tasks that leave the machines running 24/7. During these periods the disks don’t need to be on and I want the disks to spin down, like they would had they been directly connected and not in a RAID configuration. ...