From owner-freebsd-hardware@FreeBSD.ORG Thu Feb 8 14:29:55 2007 Return-Path: X-Original-To: freebsd-hardware@freebsd.org Delivered-To: freebsd-hardware@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 7D3EF16A400 for ; Thu, 8 Feb 2007 14:29:54 +0000 (UTC) (envelope-from infofarmer@gmail.com) Received: from hu-out-0506.google.com (hu-out-0506.google.com [72.14.214.227]) by mx1.freebsd.org (Postfix) with ESMTP id 03EBC13C48E for ; Thu, 8 Feb 2007 14:29:53 +0000 (UTC) (envelope-from infofarmer@gmail.com) Received: by hu-out-0506.google.com with SMTP id 38so153654huc for ; Thu, 08 Feb 2007 06:29:52 -0800 (PST) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=aaYAcVelYFVpes6c+gRJz/yJgOn+2Zz1hS5jNcoWLaf257GNAYIGo2T63CrviRQjKE15FsdFdEPTsZzI4NvRDT/eLaNibE2d0h8w792ztN5t0u4FZoh08Z9UVPsYXnLrD1YIcqXhs07KV7j8QjRQ2FYVfe+hgI2WZgr/i7kL2GI= Received: by 10.78.193.5 with SMTP id q5mr4111101huf.1170944992370; Thu, 08 Feb 2007 06:29:52 -0800 (PST) Received: by 10.78.164.20 with HTTP; Thu, 8 Feb 2007 06:29:51 -0800 (PST) Message-ID: Date: Thu, 8 Feb 2007 17:29:51 +0300 From: "Andrew Pantyukhin" Sender: infofarmer@gmail.com To: Fluffles In-Reply-To: <45CB2DE8.1090609@fluffles.net> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <1170861895.87827.8.camel@localhost> <45CA1107.1020609@fluffles.net> <45CB2DE8.1090609@fluffles.net> X-Google-Sender-Auth: 5e574e4e3dc5499a Cc: rsh , freebsd-hardware@freebsd.org Subject: Re: External HDD X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Feb 2007 14:29:55 -0000 On 2/8/07, Fluffles wrote: > Andrew Pantyukhin wrote: > > On 2/7/07, Fluffles wrote: > >> rsh wrote: > >> > Hi > >> > > >> > For backup purposes, i need removable HDD, connected through USB or > >> > Fireware > >> > > >> > I'm really impressed by Transcend solution and would like to use their > >> > Transcend 1.8" Portable HDD 20 GB, USB 2.0 > >> > It takes power directly from USB. > >> > > >> > Did somebody have success with this device? > >> > > >> > If it is a bad idea, any suggestions for External HDD ? > >> > > >> > Thanks > >> > > >> > >> Why would you want 1,8" ? That is very small indeed, but very limited as > >> well and expensive. You might as well buy a 2,5" (notebook) drive with > >> enclosure, that would just be recognised by FreeBSD as USB mass storage > >> device (umass) and works perfectly with me. Also most 2,5" enclosures > >> allow for USB power so only 1 cable is needed; though often they provide > >> an additional power supply if you use a 7200rpm drive which uses a lot > >> of power. My advice: go for Samsung 5400rpm drives they are very > >> power-efficient and still quite fast. > > > > 1.8"? 2.5"? > > 1,8" are extremely small drives; like compactflash models or so > 2,5" are regular notebook drives -- too very small > 3,5" are, as you know, regular drives. > > The problem is, 3,5" drives use a lot of power (some 30W spinup); you > cannot pull that much from USB cable so external enclosures for 3,5" > drives will have a power adapter; this makes two cables while rsh wanted > just one cable; you can only do that with 2,5" and below. So i recommend > 2,5" drives. Sure, sure, I just wanted to continue the lineup of sizes. Maybe somebody will come up with 5,25" and portable multi-bay NAS solutions :-) BTW, many 2,5" enclosures I've seen require two usb ports, the second one just to get more power. I imagine you could get 30W from 12 dedicated USB ports :-) > > I have a Sarotech Hardbox enclosure for 3.5" > > drives and I prefer using Seagate drives inside. > > Seagate gets rather hot; Samsung is a lot better in that respect. That's what I'm saying, Seagate is hot! But seriously, fanless enclosures are a problem with any drive. Hmm, Samsung 3,5" drives are rather cheap these days, look like a bargain to me. I remember they were regarded as a bit slow, but stable some years ago, wonder if that is still true...