From: Toerless E. <tt...@cs...> - 2013-05-09 02:31:31
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Hi folks On WD USB disks, i see Power_on_hours being very low, eg: counting up only when the disk is active. Eg: one some archive disk that's 24/7 connected to a 27/7 PC just a few weeks of Power_on_Hour after 3 years, which is as little as i accessed the disk. Does this mean that the USB-SATA controller in the external case is actually disconnecting the disk from power ? I would have to open up one of the boxes and put it to a voltmeter otherwise ;-) I was hoping that this would be a real good thing for the life expectancy of the disk because even all the disc elecronics would be without power. So worst case if the USB adapter fails/expires one can always ge to the disk hook it up again and get to the data. On a SATA disk used natively in a NAS/PC i guess the drive electronics could also expire (probably not that often, mostly it's going to be surface issues, i know). Have folks experience with Power_on_hours on internal disks ? Eg: Seen any cases where in a NAS or PC or for some type of disk this counter would also just indicate the busy cycle ? Are there any NAS that can really disconnect powr from disks ? I know it's pretty impossible with a PC. Cheers Toerless |