[Novalug] best hard disk setup for home file server?
Bryan J. Smith
b.j.smith at ieee.org
Tue Oct 20 17:34:31 EDT 2009
Several years ago, after several of my articles on near-line/enterprise recovery
caused many SMB, SOHO and home users to balk at costs, I wrote this article ...
"Common Sense Disaster Recovery"
Part 1 is really for SOHO users as much as SMBs ...
1. The 3 basic levels of data redundancy
There are 3 basic levels of data redundancy:
A. On-line: immediate recovery of data on the system itself
B. Near-line: near-immediate recovery from another system on the network
C. Off-line: disaster recovery when you don't have the system, let alone the network
On-line solutions like mirroring, parity, snapshots, etc... won't prevent loss due to
volume or filesystem corruption, or compromise for that matter. Near-line also
duplicates the risk with compromise as someone who has access to a single
box can compromise the data of all. Yes, Linux systems are compromised.
Which is why off-line is not optional for any data, even those with an on-line
recovery mechanism like mirroring.
----- Original Message ----
From: Richard Ertel <richard.ertel at gmail.com>
i came to a realization that i don't need fault tolerance on data that
is already backed up. why have THREE copies of it, essentially? any
drive in the server dies, all my data is covered.
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