From owner-freebsd-questions@FreeBSD.ORG Tue Jun 23 21:45:14 2009 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 B90CD1065670 for ; Tue, 23 Jun 2009 21:45:14 +0000 (UTC) (envelope-from rsmith@xs4all.nl) Received: from smtp-vbr11.xs4all.nl (smtp-vbr11.xs4all.nl [194.109.24.31]) by mx1.freebsd.org (Postfix) with ESMTP id 318278FC08 for ; Tue, 23 Jun 2009 21:45:13 +0000 (UTC) (envelope-from rsmith@xs4all.nl) Received: from slackbox.xs4all.nl (slackbox.xs4all.nl [213.84.242.160]) by smtp-vbr11.xs4all.nl (8.13.8/8.13.8) with ESMTP id n5NLjCq5050052; Tue, 23 Jun 2009 23:45:12 +0200 (CEST) (envelope-from rsmith@xs4all.nl) Received: by slackbox.xs4all.nl (Postfix, from userid 1001) id 49659BA9C; Tue, 23 Jun 2009 23:45:12 +0200 (CEST) Date: Tue, 23 Jun 2009 23:45:12 +0200 From: Roland Smith To: Gary Kline Message-ID: <20090623214512.GA41195@slackbox.xs4all.nl> References: <20090622230729.GA20167@thought.org> <20090623201041.GA23561@thought.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="u3/rZRmxL6MmkK24" Content-Disposition: inline In-Reply-To: <20090623201041.GA23561@thought.org> X-GPG-Fingerprint: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 X-GPG-Key: http://www.xs4all.nl/~rsmith/pubkey.txt X-GPG-Notice: If this message is not signed, don't assume I sent it! User-Agent: Mutt/1.5.19 (2009-01-05) X-Virus-Scanned: by XS4ALL Virus Scanner Cc: Kurt Buff , FreeBSD Mailing List Subject: Re: you're not going to believe this. 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: Tue, 23 Jun 2009 21:45:15 -0000 --u3/rZRmxL6MmkK24 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jun 23, 2009 at 01:10:41PM -0700, Gary Kline wrote: > On Tue, Jun 23, 2009 at 12:22:19PM -0700, Kurt Buff wrote: > > On Mon, Jun 22, 2009 at 16:07, Gary Kline wrote: > >=20 > > For a small unit like this, SSD is really nice. > >=20 > > But, for my workstations/servers, I'm wondering if a pure > > battery-backed RAM disk, in RAID1 with a regular hard drive, might be > > the real screamer. >=20 > battery-backed ram sound great for the time being! The downside is low capacity: 4-8 RAM modules, limiting these devices to 64GiB. And they consume more power than HDDs when idle! [http://techreport.com/articles.x/16255/11] > if not now [this minute], then relatively soon, i'm guessing > within a few years somebody will have a solid-state device that emulates > the current mechanical technology. it will wind up being considerably= =20 > faster than the current drives and suck Much less juice. =20 Intel's X25 is already faster [http://www.intel.com/design/flash/nand/extreme/index.htm] and consumes less electricity than a HDD [http://techreport.com/articles.x/16255/11]. Of course RAM-based disks kick ass when writing files. [http://techreport.com/articles.x/16255/6] > oh yeah, and in a few years *every* computer will have a battery back up > --not just our laptops. after some N minutes everything will be saved. > much less lost data due to sudden power outtages. I don't think so. Not every part of the world suffers from regular power outages. And efficient batteries require rare raw materials like lithium, with demand far outstripping winnable reserves. Roland --=20 R.F.Smith http://www.xs4all.nl/~rsmith/ [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated] pgp: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 (KeyID: C321A725) --u3/rZRmxL6MmkK24 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (FreeBSD) iEYEARECAAYFAkpBTOgACgkQEnfvsMMhpyVvsACaA0ZP1J6NuXtyujVbjw6ChjKB UUQAoJpQNv4pwelh/NqSIqLVjImXO1CD =3SOt -----END PGP SIGNATURE----- --u3/rZRmxL6MmkK24--