Date: Thu, 1 Dec 2011 12:04:44 +0100 From: Polytropon <freebsd@edvax.de> To: CyberLeo Kitsana <cyberleo@cyberleo.net> Cc: Robert Huff <roberthuff@rcn.com>, questions@freebsd.org Subject: Re: problem formating disk with gpart Message-ID: <20111201120444.b4eb5ce1.freebsd@edvax.de> In-Reply-To: <4ED735CD.7030505@cyberleo.net> References: <20182.39340.354254.608836@jerusalem.litteratus.org> <4ED735CD.7030505@cyberleo.net>
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On Thu, 01 Dec 2011 02:07:41 -0600, CyberLeo Kitsana wrote:
> On 11/30/2011 03:01 PM, Robert Huff wrote:
> >
> > One of my systems has a hot-swap eSATA device, which reports as
> > "ad1". I'm trying to use this to prepare a new disk using gpart and
> > something (possibly my understanding) is broken.
> > After removing another disk and inserting the new one, I do:
> >
> >>> gpart show ad1
> > => 34 976773101 ad1 GPT (465G)
> > 34 976773101 - free - (465G)
> >
> > ... which is the value for the disk just removed.
> > If I do (to start clean):
> >
> >>> gpart destroy ad1
> > gpart destroy ad1
> > gpart: Input/output error
> >
> > Huh?
>
> If I remember correctly, the old ATA subsystem (ad*) does not support
> hotswap notification, so the kernel will not see a device change until
> reboot or reinit. You should probably be using AHCI (if the driver
> supports your chipset) or very careful use of atacontrol detach, attach,
> or reinit.
I'm not fully sure if this applies here, but there are
the following commands:
atacontrol attach channel
atacontrol detach channel
atacontrol reinit channel
atacontrol spindown device [seconds]
atacontrol list
It seems as they are intended to support "manual hotswapping"
to be done with SATA. See "man atacontrol" for details.
--
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...
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