From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1MXzxj-0004tp-4C for garchives@archives.gentoo.org; Mon, 03 Aug 2009 16:00:35 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 27312E0542; Mon, 3 Aug 2009 16:00:34 +0000 (UTC) Received: from mail-yw0-f172.google.com (mail-yw0-f172.google.com [209.85.211.172]) by pigeon.gentoo.org (Postfix) with ESMTP id 04FDFE0542 for ; Mon, 3 Aug 2009 16:00:33 +0000 (UTC) Received: by ywh2 with SMTP id 2so8273742ywh.2 for ; Mon, 03 Aug 2009 09:00:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=7CJRZAXUDxavjz5LR5xrnGRr4S6PRfcGg9DIbfyCIZM=; b=BEMP96pBL+eNp9mn7d/JA3Tkml+qpKaBwjCWJlmyz8ReagSRj/3KYjEamGJuN40R0F Qx8T7Tvfrrd0yisUo6axLowm12G2CKnqeg2PXUx0D3WpmVte5SsVjeziZk89kSx+0xOE Lyaz13dpnoVU55Q0TSRfZlDl5jPw+WgYRhblE= 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 :content-type:content-transfer-encoding; b=QiJmWgZjcapQPXDslmLOxR4NarsOM45Tv9ShQa4x+FMnA0ZTGvEiHPwNCGKOeduozY RGKgnwwTkT1pkNqOy1qiHVZJkJtWhkL9H5RUrpOOffnCd7xEK6R57mTvPgdY49eO+aXN H+hqcWEzsPkYuelykNTs6rxobb+g22uNQOfY0= Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Received: by 10.100.58.12 with SMTP id g12mr8421247ana.70.1249315233397; Mon, 03 Aug 2009 09:00:33 -0700 (PDT) In-Reply-To: <49bf44f10907311031n661ac9e5ifc6ec918988305fa@mail.gmail.com> References: <49bf44f10907260346y62a6f95dyfda763fceb0bcb39@mail.gmail.com> <49bf44f10907270544i5a5922ddo28d6a2c23d7ed6a8@mail.gmail.com> <4A6DE730.90103@f_philipp.fastmail.net> <49bf44f10907281052l184efbacvffd7fa1344ddbd2e@mail.gmail.com> <49bf44f10907290820k1bbf0ebct8ca7becceda19771@mail.gmail.com> <20090729191540.4685c378@krikkit.digimed.co.uk> <3246D693-90B9-4541-96A0-8711DBB9C156@stellar.eclipse.co.uk> <49bf44f10907311031n661ac9e5ifc6ec918988305fa@mail.gmail.com> Date: Mon, 3 Aug 2009 09:00:33 -0700 Message-ID: <49bf44f10908030900v629c841ds5038f7f15266648b@mail.gmail.com> Subject: Re: [gentoo-user] {OT} SSD instead of RAID1? From: Grant To: gentoo-user@lists.gentoo.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Archives-Salt: 5cf6eee2-1317-4946-95e3-6cf61c27b34f X-Archives-Hash: e5bf00470cc644ae0b4d63027f6d2032 >>>> Anyway, the point of all this is to prevent an HD failure from >>>> stopping the system. =A0An SSD is much safer, right? >>> >>> SSDs are still relatively new technology, so predicting failure rates i= s >>> less reliable. What's wrong with using RAID-1? It's proven technology a= nd >>> totally resistant to a single HD failure. >> >> This was Grant's original question - whether SSD / flash technology is m= ore >> reliable than RAID-1 of conventional disks? - and one to which no-one >> appeared comfortable giving a categorical answer. >> >> Stroller. > > I've come up with a couple reasons to wait a bit longer to switch my > important systems to SSD. > > 1. SLC is faster and (more importantly) should last much longer than > MLC. =A0The Super Talent Ultradrive 32GB drives are priced ~$120 for MLC > and ~$350 for SLC, so I'd like to wait for that SLC price to drop. > It's worth mentioning though, that even conservative estimates of MLC > lifetimes put them far beyond that of HD drives. > > 2. SSD fIrmware is being updated relatively frequently right now > (especially newer SSDs) and all data is lost during a firmware update. > > I'm sold on SSDs as RAID1 replacements though. > > BTW, I read that Samsung manufactures the memory for all major brand > SSDs (including Super Talent). > > - Grant An interesting read here: http://blogs.gentoo.org/nightmorph/2009/08/02/ssds-and-filesystems - Grant