Date: Mon, 26 Feb 2001 08:50:08 -0800 (PST) From: Stephen Rose <rose@rose.nu> To: Soren Schmidt <sos@freebsd.dk> Cc: freebsd-hackers@FreeBSD.ORG, Joe Gleason <clash@tasam.com> Subject: Re: ata-disk ioctl and atactl patch Message-ID: <Pine.BSF.4.05.10102260845001.64594-100000@k9.rose.nu>
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A couple of us on the questions list have asked for a way to spin down ide
disks when idle. Is there any chance that this utility could lead to
something useful there?
Steve Rose
It seems Scott Renfro wrote:
> As I promised on -mobile earlier this week, I've cleaned up my patches
> to port the {Net,Open}BSD atactl utility, including a simplistic
> ata-disk ioctl. They apply cleanly against this afternoon's -stable
> (including Soren's latest commit bringing -stable up to date with
> -current). I've been running them for some time and they ''work great
> here''.
>
> Before announcing this in a broader context, I wanted to get a bit of
> feedback on the ioctl implementation. In particular, is it safe to
> just do an ata_command inside adioctl() without any further checking?
> (e.g., can this cause bad things to happen under heavy i/o load?)
No its not safe at all, you risk trashing an already running command...
Anyhow, I have an atacontrol thingy in the works for attach/detach,
raid control etc, etc, I'll try to merge this functionality into that
(the ioctl's will change etc, but the functionality is nice)...
-S?ren
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