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To: Peter Wemm <peter@wemm.org>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Fri, 22 Aug 2003 14:48:41 PDT."
             <20030822214841.22D7D2A8C1@canning.wemm.org> 
Date: Sat, 23 Aug 2003 09:28:15 +0200
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cc: Peter Jeremy <PeterJeremy@optushome.com.au>
cc: src-committers@FreeBSD.org
cc: Paul Saab <ps@FreeBSD.org>
cc: cvs-all@FreeBSD.org
cc: cvs-src@FreeBSD.org
Subject: Re: cvs commit: src/sys/geom geom_ccd.c 
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In message <20030822214841.22D7D2A8C1@canning.wemm.org>, Peter Wemm writes:
>Peter Jeremy wrote:
>> On Fri, Aug 22, 2003 at 04:24:43AM -0700, Paul Saab wrote:
>> >This was done with a 12 port 3ware with 12x250gig (really 232.88GB)
>> >disks all in 3U.
>> 
>> How are you going to back it up?
>
>You haven't seen the tape silo that I saw on wednesday :-).  It impressed
>the hell out of me, even with my hard-core hardware cynic hat on.
>
>I *think* it was this beastie:
>http://www.storagetek.com/prodserv/products/tape/9310/
>144,000 tape cartridges per silo
>28.8 PetaBytes storage per silo
>100TB per hour backup capacity
>
>I want one for home so that I can back up my mail inbox :-)

I was lightly involved in seeing ICMWF move their four silos.  They had
six of their operators spend an entire day moving tapes in wheelbarrows
from one room to the next :-)

Once you get into that amount of storage you either have two copies
already or you live with your losses.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.