On 12/24/2010 05:07 PM, Mark Knecht wrote: > 2010/12/24 JÃrn Nettingsmeier <nettings@xxxxxxxxxxxxxxxxxxxxxx>: >> On 12/23/2010 09:15 PM, Mark Knecht wrote: >> >>> 1) The Green drives do typically run at lower RPM. It's part of the >>> power saving strategy. I don't typically thing drive RPM has a huge >>> impact on audio work but clearly others could have a differing opinion >>> on that. It would make for an interesting conversation I think. >>> >>> 2) The biggest part of power saving on the WD Green drives is that >>> they park the heads _very_ often. While this hasn't been a big problem >>> under Windows for me under Linux it's a bit of an unknown at this >>> point. I have one system that uses one of the 1TB drives as the main >>> system drive. The head gets parked and then Linux wakes it up every 2 >>> minutes or so. The issue is these drives are only spec'ed at 300,000 >>> head parks over their lifetime and then they are out of spec. >>> >>> 30 parks per minute * 24 hours * 365 days = 262,800 head parks. >>> >>> Basically, if the drive is left in a Linux system that's powered up >>> all the time then the drive is out of spec in a little over a year. >>> >>> Does this matter? I don't know. I have one machine that is a year old >>> and it's approaching end-of-life? >> >> in a 24/7 machine, you must switch of the parking behaviour in the >> firmware, which is only possible with an arcane MS-DOS flash tool that >> requires a freedos image to use (luckily, it can boot off a usb stick, >> so you don't have to install a floppy). > > Yeah, I've heard of that, and I suspect it works. I've not used it > myself. I felt it reasonable to let folks know what they were buying > and what the issues might be. Who knows what the issues might be with > that feature turned off? the drive is a lot faster and will reach its expected lifetime, hopefully. > Certainly power consumption will go up. no. under linux, power consumption will actually go down, since the constant head parking and unparking is avoided. if you implement laptop mode with very large dirty buffers, you might actually reach a point where there's actual benefit to this "green" feature, but i have a very strong suspicion it's just a stupid greenwashing feature they came up with (without expecting much themselves), because marketing wanted it. > Maybe > most folks don't leave their DAWs powered up 24/7, I don't know. true. the problem hit me on a server. but i'm pretty sure that on a DAW, you don't want your disk heads to go for a nap every 15 seconds either, especially since they do it with a loud "clack" for extra emphasis... the caviar green is definitely a very stupid product, probably even under windows. as faberman said, if you are concerned about power consumption and noise, invest in 2.5" drives. happy holidays, jÃrn (who is stuck on a train in the snow and bored enough to read mail on christmas eve...) _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
