Date: Mon, 16 Mar 2009 20:02:58 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Andriy Gapon <avg@icyb.net.ua> Cc: freebsd-current@freebsd.org Subject: Re: ata: printf on every spinup/spindown? Message-ID: <10611.1237233778@critter.freebsd.dk> In-Reply-To: Your message of "Mon, 16 Mar 2009 18:20:42 %2B0200." <49BE7C5A.2080103@icyb.net.ua>
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In message <49BE7C5A.2080103@icyb.net.ua>, Andriy Gapon writes: >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. The reason I added the printf was to make it very annoying. Spinning a disk up and down too often wears it out much faster than leaving it running. In general you do not want to spin a disk down unless it is going to stay spun down for at least 15-30 minutes. If dmesg is going to spin your disk up, then it will wake up every 5 minutes due to the atrun message and you are clearly doing it wrong. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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