Date: Tue, 17 Mar 2009 14:47:42 +0200 From: Andriy Gapon <avg@icyb.net.ua> To: Garrett Cooper <yanefbsd@gmail.com> Cc: "army.of.root" <army.of.root@googlemail.com>, freebsd-current@freebsd.org Subject: Re: ata: printf on every spinup/spindown? Message-ID: <49BF9BEE.5090706@icyb.net.ua> In-Reply-To: <7d6fde3d0903170529u54d76afaiafc3db490aab8558@mail.gmail.com> References: <49BE7C5A.2080103@icyb.net.ua> <49BEB449.9090302@googlemail.com> <7d6fde3d0903170528g656e9edfn4fe5afc013c42999@mail.gmail.com> <7d6fde3d0903170529u54d76afaiafc3db490aab8558@mail.gmail.com>
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on 17/03/2009 14:29 Garrett Cooper said the following: > On Tue, Mar 17, 2009 at 5:28 AM, Garrett Cooper <yanefbsd@gmail.com> wrote: >> On Mon, Mar 16, 2009 at 1:19 PM, army.of.root >> <army.of.root@googlemail.com> wrote: >>> Andriy Gapon wrote: >>>> I am playing with ata spindown feature and I think that it is really >>>> unnecessary >>>> to print a message each time ata driver is going to spindown a disk or let >>>> it be >>>> spinned up: >>>> ad6: Idle, spin down >>>> ad6: request while spun down, starting. >>>> ad6: drive spun down. >>>> ad6: Idle, spin down >>>> ad6: request while spun down, starting. >>>> >>>> Especially this is not useful when "Idle, spin down" messages are going >>>> spin up >>>> the disk via syslog logging to disk :-) >>>> >>>> Maybe put these under verboseboot if not drop entirely? >>>> >>> Hi, >>> >>> yah, I had some unpleasant experience with spinning down disks. That really >>> is only useful for backup disks or similar disks which are not accessed >>> frequently or used by any programs. >>> >>> :) The HDD consumes in Idle mode only something like 1W so it isnt really >>> economic to spin it down. >> Spinning down to a lower RPM seems legitimate, compared to spinning it >> down, which kills the drives. Look at WD's green drives -- they claim >> to get 30% ~ 50% better power efficiency than standard drives. >> >> It may not seem like much, but HDD's really kill laptop batteries and >> also really suck up juice in data centers. Any way to reduce energy >> consumption without killing off hardware is really good in my book >> 8-). >> >> Thanks PHK! > > Err... Andriy :P! For nothing? :-) phk is the author of the for this feature. -- Andriy Gapon
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