Re: [Nolug] Backing up linux

From: Ron Johnson <>
Date: Fri, 15 Feb 2008 19:20:35 -0600
Message-ID: <>

On 02/15/08 14:29, Joey Kelly wrote:
> On Friday 15 February 2008 02:19:02 pm Ron Johnson wrote:
>> Disks are *really* cheap. Unless you are a cheap bastard or need
>> 10TB with the speed that only jillions of 15K RPM 73GB spindles and
>> a 4Gbps SAN with 64GB cache RAM can give you, no one should use
>> RAID-5 anymore.
> If you guys remember, a couple of years back google released their study about
> storage options, where they used their in-house disk farms as raw data. They
> came back and said to forget RAID, and just make three or four copies of your
> data, at least some of which needs to be off-site.

You need all sorts of metadata and supporting utilities to (a) make
the copies, (b) ensure that the copies are updated when the
originals are modified, and (c) tell the users where to look for the
data when the first device dies.

That equals *lots* of extra overhead.

> One week later, another large company released a separate study, which said
> essentially the same thing.

Ron Johnson, Jr.
Jefferson LA  USA
PETA - People Eating Tasty Animals
Nolug mailing list
Received on 02/15/08

This archive was generated by hypermail 2.2.0 : 12/19/08 EST