Comment 7 for bug 539064

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liorda (liorda) wrote : Re: [Bug 539064] Re: "Safely remove drive" is waking-up my external HD

Is there any way that the drive can signal the OS about a spindown
going to happen? that way, the OS can flush changes *prior* the
spindown and the problem of "waking up" will be fixed.

On Wed, Sep 15, 2010 at 10:47 AM, AmenophisIII
<email address hidden> wrote:
> i agree, that this is a design problem of the filesystem/blockdevice cache management.
> the drive spins down possibly before pending changes are written out so unmounting has to ensure that later by waking up the disk and commit the changes. also drives can spindown themself without OS intervention (see hdparm -S docs).
>
> --
> "Safely remove drive" is waking-up my external HD
> https://bugs.launchpad.net/bugs/539064
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