From owner-freebsd-questions@FreeBSD.ORG Wed May 12 23:44:35 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D1C46106566B for ; Wed, 12 May 2010 23:44:35 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: from mail-qy0-f190.google.com (mail-qy0-f190.google.com [209.85.221.190]) by mx1.freebsd.org (Postfix) with ESMTP id 7DEA78FC17 for ; Wed, 12 May 2010 23:44:35 +0000 (UTC) Received: by qyk28 with SMTP id 28so130930qyk.27 for ; Wed, 12 May 2010 16:44:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=k5NyefiW60XRmJu8U6COCWX2OXtuYueDF8LS4fXumY4=; b=oS4KMP/oltoB9Npy5qCwLh/49+VcXoHyXVXXe7bQZHxNcxa/K+Sail8tCIWdyZwRhY kO5HkgeaglGDkqvQvtLo0//0gqplr9YvkZ+ZVzuAeb6IDwJgaIa6GSwvkGi8d7MX4wif Hn92STLZnozWm3HlF8RJCjPFXw0do4PqBFV/8= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=I+TucqcrUVCs3LBbj+oHM6UEUAiu/lDqRdktYqLHb005Lad2rX9Dmrv78j8zU3fbhX LUF/1Tinh8XMVUaEonMHEqdMtRClRvKlrVeF8O9sPBvwFM0vsLSQdAxBS/sgjRtBXGA2 kp64JTxoso3g2m8LlTbdLWvmlNATPW9QWAMrk= MIME-Version: 1.0 Received: by 10.224.88.90 with SMTP id z26mr5616963qal.113.1273707874604; Wed, 12 May 2010 16:44:34 -0700 (PDT) Received: by 10.229.99.67 with HTTP; Wed, 12 May 2010 16:44:34 -0700 (PDT) In-Reply-To: References: <201005121456.o4CEurEZ078671@lava.sentex.ca> <201005122049.o4CKn7kS080566@lava.sentex.ca> Date: Wed, 12 May 2010 18:44:34 -0500 Message-ID: From: Adam Vande More To: "A. Wright" Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: FreeBSD - , Mike Tancsa Subject: Re: Long I/O pauses on same mass storage X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 12 May 2010 23:44:35 -0000 On Wed, May 12, 2010 at 6:21 PM, A. Wright wrote: > This is indeed one of the so-called "eco" drives. > > The controller is set to SATA (no mention of ahci, though I will > now look at it as suggested earlier to see if I can control the > problem that way). > > > > In addition to what I pointed out earlier, I believe that is >> also a 4k sector drive. You'll need to align your partitions >> accordingly. >> > > As far as I can tell, it is a standard 512 byte sector. The > general lack of documentation with this drive (shipped in a > plastic "coffin" -- the only docs supplied with it were the > label itself), but on the WD site, they indicate: > Formatted Capacity 1500301 MB > Used Sectors Per Drive 2930277168 > As I understand it, all the 64MB EARS model drive have the WD Advanced Format eg 4k sectors. I don't have one and I'm pulling this (from the depths of memory || out of my ass), but I think those drives also have something funky going on where they report normal 512 sector when in fact they do have 4k ones. Either way, it wouldn't hurt to align on 1MB boundaries. -- Adam Vande More