Hot-swap SATA and atacontrol

Justin Finkelstein justin at
Tue Aug 2 16:03:44 GMT 2005

That's what I thought; I've never sync'ed stuff before unmounting it before,
and chats with other BSD bods in my area say that just unmounting will do -
and I think I'll stick to that.

-----Original Message-----
From: Wilko Bulte [mailto:wb at] 
Sent: 02 August 2005 17:01
To: Scot Hetzel
Cc: Justin Finkelstein; Colin King; freebsd-current at
Subject: Re: Hot-swap SATA and atacontrol

On Tue, Aug 02, 2005 at 10:44:07AM -0500, Scot Hetzel wrote..
> On 8/2/05, Justin Finkelstein <justin at> wrote:
> > I might be being a little dense, but what do you mean by sync?
> > 
> before you unmount the drive, type:
> sync
> sync
> sync
> Then unmount the drive, and remove it.

Unmount does not return until the buffers have been synced anyway, so this
does not buy you anything.

The ancient form is more like:

sync;sync;sync;<halt button on your PDP/11 frontpanel>

Wilko Bulte				wilko at

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