From owner-freebsd-questions Tue Sep 3 23:45:46 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id XAA26556 for questions-outgoing; Tue, 3 Sep 1996 23:45:46 -0700 (PDT) Received: from gatekeeper.barcode.co.il (gatekeeper.barcode.co.il [192.116.93.17]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id XAA26543; Tue, 3 Sep 1996 23:45:37 -0700 (PDT) Received: (from nadav@localhost) by gatekeeper.barcode.co.il (8.6.12/8.6.12) id JAA21278; Wed, 4 Sep 1996 09:44:15 +0200 Date: Wed, 4 Sep 1996 09:44:15 +0200 (IST) From: Nadav Eiron To: Gary Palmer cc: Branson Matheson , freebsd-questions@freebsd.org Subject: Re: Backup hardware recommendations? In-Reply-To: <1699.841779419@orion.webspan.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk On Tue, 3 Sep 1996, Gary Palmer wrote: > Branson Matheson wrote in message ID > : > > On Tue, 3 Sep 1996, Gary Palmer wrote: > > > Huh? 8mm can go to 9Gb (uncompressed) from memory (EXB-8505). To my > > > knowledge DAT is only 2 or 4Gb (again, uncompressed) > > > 8mm : 9gb compressed. 5 gb uncompressed. but you're right... a 4mm only > > stores 2 gb... uncompressed. I stand corrected... however.. given the > > amount of trouble that I have had with 8mm and have not had with 4mm I > > will still stand by it. > > Hmm. Actually, I've had very few 8mm problems (apart from needing > frequent cleaning, which all drives (should) need). Never hit a DAT > hard, so I can't comment on that. > > Looking at exabytes web page (www.exabyte.com) it seems like there is > a new drive on the market (two actually). 8505XL (7Gb uncompressed, > 14Gb compressed). Just got a EXB10h for network backups here with a > 8505XL in it, so I'll soon find out about that :) > > Then there is the Mammoth. 20Gb uncompressed, 40Gb compressed. > > > > > DAT is bleeding edge.. and although seems to be stable.. I try to > > > DLT? > > > WHo boy.. again.. yes DLT.. ( this has been a very rough day for me. > > Sorry for the screwups ) > > No problem. Two more things: I've used DLT's since the day they were born and they are RELIABLE like nothing else is. I guess I've used thousands of cartridges, including inside a truck in the middle of the desert at 40 deg. C with sand blowing through the drive while it's working. The only time they lost data for me is when I dropped a cartridge from the second floor window (don't try this at home :-). Those beasts are amazing. The second thing I like about them is speed. If you actually want to backup 40GB, you need something that's faster than a DAT drive if you want the backup to finish in time (just make sure you have the disks and controllers to match that speed). Quantum (who licensed the technology from DEC) just announced a new model that holds 35GB uncompressed (70GB compressed) on the same cartridges, and works at 10MB/sec compressed (it's a fast wide SCSI device). Look at http://www.quantum.com/products/menus/tape.html. The down side is that it costs :-(, so now I use a DAT drive. > > Gary > -- > Gary Palmer FreeBSD Core Team Member > FreeBSD: Turning PC's into workstations. See http://www.FreeBSD.ORG/ for info > Nadav