Date: Mon, 29 Sep 2008 17:25:32 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: Gavin Atkinson <gavin@FreeBSD.org> Cc: Jeremy Chadwick <koitsu@FreeBSD.org>, freebsd-stable@FreeBSD.org Subject: Re: Recommendations for servers running SATA drives [hot-swap] Message-ID: <48E0F36C.1080400@quip.cz> In-Reply-To: <1222699642.24339.12.camel@buffy.york.ac.uk> References: <20080921213426.GA13923@0lsen.net> <20080921215203.GC9494@icarus.home.lan> <20080921215930.GA25826@0lsen.net> <20080921220720.GA9847@icarus.home.lan> <249873145.20080926213341@takeda.tk> <20080927051413.GA42700@icarus.home.lan> <765067435.20080926223557@takeda.tk> <20080927064417.GA43638@icarus.home.lan> <Pine.OSX.4.64.0809271453550.4630@toasty.nat.fasttrackmonkey.com> <20080927202250.GA60980@icarus.home.lan> <48E0DB7E.20804@quip.cz> <1222699642.24339.12.camel@buffy.york.ac.uk>
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Gavin Atkinson wrote: > On Mon, 2008-09-29 at 15:43 +0200, Miroslav Lachman wrote: > >>Jeremy Chadwick wrote: >> >> >>>On Sat, Sep 27, 2008 at 03:16:11PM -0400, Charles Sprickman wrote: >>> >>>I've successfully done a hot-swap (hardware: SATA hot-swap backplane, >>>AHCI in use, SATA2 disks), but it required me to issue "atacontrol >>>detach" first (I am very curious to know what would've happened had I >>>just yanked the disk). Upon inserting the new disk, one has to be >>>*very* careful about the order of atacontrol commands given -- there >>>are cases where "attach" will cause the system to panic or SATA bus to >>>lock up, but it seems to depend upon what commands were executed >>>previously (such as "reinit"). >>> >>>Sorry if this is off-topic, but I wanted to mention it. >> >>Hot-swapping is totally upredictable on FreeBSD (from my experiences). I >>tried it many times on Asus 1U servers and on Sun Fire X2100 / X2100 M2 >>with FreeBSD 6.2 and 7.0 (both i386). > > > I can't speak for the Dell, but I can at least say that at least on the > X2100, not even Solaris supports either hot-swapping or the built in > software RAID. When they were first released the advertising said that > they had these, but those claims was quietly removed from the website > some weeks after release. Short answer: give up on hot-swap the X2100. > > As for the X2100 M2, that is supposed to support it, and I believe it > works fine for us under Solaris. I'm not sure if I've got any spare > M2's here, if so I'll have a play. It was about year ago with Asus and Sun Fire X2100. I don't have Asus servers now (all returned as reclamation). Now I am running one X2100 and about ten X2100 M2. I have one spare X2100 M2, so if somebody have exact order of commands used to "hot-swap" the disk, I can test it in few days. Miroslav Lachman
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