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    SubjectRe: [patch] My AMD IDE driver, v2.7
    On Mon, Mar 18, 2002 at 08:20:05PM +0100, Pavel Machek wrote:
    > > 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 ...

    Vojtech Pavlik
    SuSE Labs
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