From owner-freebsd-hackers@FreeBSD.ORG Thu Apr 26 18:18:43 2012 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 595E71065680 for ; Thu, 26 Apr 2012 18:18:43 +0000 (UTC) (envelope-from yanegomi@gmail.com) Received: from mail-lpp01m010-f54.google.com (mail-lpp01m010-f54.google.com [209.85.215.54]) by mx1.freebsd.org (Postfix) with ESMTP id CF2E78FC15 for ; Thu, 26 Apr 2012 18:18:42 +0000 (UTC) Received: by lagv3 with SMTP id v3so1519746lag.13 for ; Thu, 26 Apr 2012 11:18:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=rudCtQk5EuHKNSj7ka/kgBj96tSJpAAlO23zL4S+oDE=; b=cnAsiDRg2cmcn/rqpFxAfBHsmlflczkd3nS3j4eF0MsucYS0j8ujIsFjcRgLP+meXk txgAMYOGjgC6xB+ef0AfVKT9hQs40jnI1PbOUXtxxoQnd5qDSRZG2SJuQC0o8hiD6ymn X8Plxa7auLPuqBzlDXRGoHUFfpOAVE3/Olrq9GAl/NVbo+laCnJiVb+umVGQTSGuXHG/ tJQ2X9EaBZKcZMOsDX6gOidQ0pKxVKI+bfVNO1Lv91ujb8h/LYBulD5cOqZ+jcML3qwn L2/VGkZyG+fj16sSbNWa/Fmjtj+ANiqiU6Q44oOqimWY5015ceRTBW5jzm6J1cn1oA/X cQqg== MIME-Version: 1.0 Received: by 10.112.41.5 with SMTP id b5mr3704987lbl.61.1335464321582; Thu, 26 Apr 2012 11:18:41 -0700 (PDT) Received: by 10.112.76.169 with HTTP; Thu, 26 Apr 2012 11:18:41 -0700 (PDT) In-Reply-To: References: Date: Thu, 26 Apr 2012 11:18:41 -0700 Message-ID: From: Garrett Cooper To: Wojciech Puchar Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-hackers@freebsd.org Subject: Re: best possible GJOURNAL device? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Apr 2012 18:18:43 -0000 On Thu, Apr 26, 2012 at 10:42 AM, Wojciech Puchar wrote: >>> http://www.vikingmodular.com/products/arxcis/ddr3/ddr3.html >> >> In general devices like these that I've dealt with in the past are >> presented as SATA or SAS devices, but some devices require additional >> drivers (take Ramdrives devices for instance). > > this one - as described - is 100% regular DDR3 DIMM and plugged as normal > memory. > >> Depends on the BIOS, the settings set in the BIOS, etc. >> >>> FreeBSD is but it can be patched easily. >> >> >> I wouldn't depend on volatile memory working in a non-volatile manner >> unless it's battery backed (which companies like Ramdrive, STEC, > > this is supercapacitor backed. after poweroff it have enough time to write > all to SLC flash chip. > >>> How to get DRAM controller mapping i mean what DIMM is at what address? >> >> >> What is located where should be opaque if the designer designed it >> properly (otherwise a driver will need to be added to interface with >> the device if the vendor is trying to be clever or is not fully >> conforming to ATA/SCSI standards). > > please read attached link. it is NOT SATA/ATA/SAS/PCIe device. I just read the product tearout. It says that it depends purely on BIOS support, which may or may not exist for your motherboard (and there's an SSD that it uses to write out the data in the event that power fails). So I'm guessing that if it works with your motherboard, it will work regardless of the OS. How it's presented to the OS? ENOCLUE (ask Viking). Thanks, -Garrett