From owner-freebsd-questions@FreeBSD.ORG Thu Apr 30 16:43:59 2015 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 705B0C8B for ; Thu, 30 Apr 2015 16:43:59 +0000 (UTC) Received: from mail-ob0-f181.google.com (mail-ob0-f181.google.com [209.85.214.181]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 3C17910CE for ; Thu, 30 Apr 2015 16:43:58 +0000 (UTC) Received: by obblk2 with SMTP id lk2so9587461obb.0 for ; Thu, 30 Apr 2015 09:43:57 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:cc:content-type; bh=Xdm+MuDTlC4c45WVByHda8734gNdC03DX3yg96cG8I4=; b=dcRd5a0yes4iYxuKT0VJ3fdhjP4yM/pT4/YawZM8NY3bIwuaAKDHHACgUd4+7VNdyy PhOOinvZt42v32s/355vpLZ4sR4CqMHJpRkud6mwil6u4d6QbbS65Ge49venlc60nCou 7R8SG0YruFORIFDUYVIBVMGqrzrT8Oaj/gepvZINh4i9i6bQRFFk4+880lgCQjh81Oue bHG14c4nNzF+DkT7rZZ0s+wHmwvkLEluj3B8B/c8iPuXXQlHXHSOXTRFqK0FTG9Q+9rK ArltWltANng3JVZKNd6mWI93aUztIwGBOrRc7Gsx7+aLGfWQoSu7n2oPXTLRHR7EWOS1 q2vw== X-Gm-Message-State: ALoCoQlukaCBVmWjUu0XjocQUEAcXPK2q6/jY8HzxEiex8cPY+kDAtcULuX92SoZzHdzqW9AbgSP MIME-Version: 1.0 X-Received: by 10.60.98.100 with SMTP id eh4mr4198193oeb.81.1430412237739; Thu, 30 Apr 2015 09:43:57 -0700 (PDT) Received: by 10.182.60.226 with HTTP; Thu, 30 Apr 2015 09:43:57 -0700 (PDT) X-Originating-IP: [2001:44b8:31b0:aa00:95b1:6cd3:bd95:9d1d] In-Reply-To: References: Date: Fri, 1 May 2015 02:43:57 +1000 Message-ID: Subject: Re: Possible (or smart) to put freebsd-boot on USB stick for root-on-ZFS? From: Jason Birch Cc: "freebsd-questions@freebsd.org" Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Apr 2015 16:43:59 -0000 > > In my head I thought it would work okay - 1064 512B blocks is a round 133 > 4KB blocks, which these SSDs report as their stripe size. Nonetheless, > fragmentation of the pool is off the charts... > That being said, I did foolishly fill this thing to 80% with a quick dump of another FS, so it's entirely possible my math is fine and things are aligned, and I'm just seeing pathological behaviour of a nearly-full copy-on-write file system.