Re: [patch] My AMD IDE driver, v2.7

Andre Hedrick
2002-03-19T22:34:43Z

Pavel,

No, it is called being a "BAD HOST". Things were added before the
infrastructure was complete to support feature. Thus the feature is now a
BUG. Sorry but that is the simple true, one of the reasons why I asked
you to delay but it is not important now.

Regards,

Andre Hedrick
Linux Disk Certification Project Linux ATA Development

On Tue, 19 Mar 2002, Pavel Machek wrote:

> Hi!
>
> > > > commands. With the proper sequencing, you can even do power management
> > > > of the drives in userspace. You don't want to do system suspend/resume
> > > > that way, but you can certainly have a userspace policy daemon running,
> > > > that powers-down and powers-up the drives, etc.
> > >
> > > See noflushd, Hdparm is able to powersave disks well, already, and it
> > > was in 2.2.X, too.
> >
> > Not all of them safely, though. Many a drive will corrupt data if it
> > receives a command when not spinned up. You need to issue a wake command
> > first, which hdparm doesn't, it just leaves it to the kernel to issue a
> > read command or whatever to wake the drive ...
>
> Is this common disk bug, or are they permitted to behave like that?
>
> Pavel
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