From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: [linux-lvm] Backup costs (was: LVM reimplementationre) From: Daniel Whicker In-Reply-To: References: Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-zlRZX8vmlIBrbwPMlQI9" Message-Id: <1013024531.21447.19.camel@Daniel> MIME-Version: 1.0 Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: Date: Wed Feb 6 13:39:01 2002 List-Id: To: linux-lvm@sistina.com --=-zlRZX8vmlIBrbwPMlQI9 Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Ben, I think you missed a very important aspect. The actual investment of the tape drives. A SDLT or LTO drive is going to run from about $4000 on up. According to datacomm warehouse, a HP 230 external LTO drives runs $3700. An SDLT drive runs $4300. You can't compare just the media costs with that of the drive. Let's consider a 1TB of data. SDLT: $4300 + (10 tapes * $50) =3D $4800 LTO: $3700 + (10 tapes * $130) =3D $5000 AIT2: $2800 + (20 tapes * $90) =3D $4600 IDE: 10 Drives * 270 =3D $2700 DDS4: $900 + (50 tapes * $24) =3D $2100 >From these numbers (using DataComm Warehouse pricing), you can see that to backup 1TB, the IDE drives are actually the second cheapest. And from a raw performance point of view, they far exceed all the other alternatives from a random access standpoint, and they are comparable to even LTO from a transfer rate point of view. Sorry... had to address this point. On Wed, 2002-02-06 at 13:14, Benjamin Scott wrote: > Here are some prices from a recent Datacomm Warehouse catalog: >=20 > Item GB Cost $/GB > -------------- --- ---- ---- > IDE HDD 100 270 2.70 > AIT2 50 90 1.80 > SuperDLT 110 150 1.36 > LTO Ultrium 100 130 1.30 > DDS-4 20 24 1.20 >=20 > As you can see, hard disk is actually the most expensive media, not the > least. This whole "hard disks are cheaper" thing is a myth propagated by > people who have never actually looked at the numbers. --=-zlRZX8vmlIBrbwPMlQI9 Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQA8YYcS/kvcHM2+TjwRAiioAJ9EkkRbIU7DxTIToiKOJQHDXWXgtgCghv3j bTUKN8DCXYOBp47yt/MRAuY= =stlE -----END PGP SIGNATURE----- --=-zlRZX8vmlIBrbwPMlQI9--