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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