Hi, I just installed a fresh version of 12.04 server and have everything configured. When i set the spin down settings on hdparm.conf everything appeared to go fine. However, when i checked the status of the drives later, it appears that 2 of my drives (bot seagate barracudas) spun down successfully while 2 drives (both WD caviar blacks) didn't. I can spin them down using hdparm -y, but not using the normal -S switch.
Also, I read that you may need to use -B, but when i tried it, i got the following:
setting Advanced Power Management level to 0xfe (254)
HDIO_DRIVE_CMD failed: Input/output error
setting standby to 1 (5 seconds)
APM_level = not supported
There is nothing touching the drives, and I followed this link to make sure SMART wasn't interrupting the process. http://zackreed.me/articles/60-spin-...dle-hard-disks
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