A nice apple story
 

On 11/20/11 10:48 AM, wrote:
On Sun, 20 Nov 2011 08:14:50 -0500, X `
wrote:

On 11/19/11 1:46 PM, wrote:

I am really becoming a RAID fan, now that drives are cheap enough to
make it reasonable. I have 2 RAIDED sets in different machines with a
lot of the same data on each of them and things I really care about
are also on a portable drive. Things like pictures, music etc are
scattered around all over the place so it would be hard to lose them
all.

I went with a modified RAID on my little Synology server. Four two
terabyte drives, with one drive set up as "backup" for the other three.
I have less than one terabyte "used" by our computer and data here.

http://tinyurl.com/7fwkgeo

That sounds like RAID 5. You don't really have a backup drive, the
data is striped across all four but you end up with one drive's worth
of overhead.

I also back up my iMac desktop to a separate one terabyte hard drive,
and my wife backs up her PC to the Synology server. All her files are
also on her at-work server, and I store my data files, photos and music
on "the Cloud," too.


I am not a cloud fan.That is only as good as the company doing it and
if they are not selling your data or charging you, they may go out of
business.


It is indeed a form of Raid 5. It allows me to have one of the four
drives go teats-up and be replaced without losing data. At least, that's
my understanding of what it is.

The iCloud is my third backup. I'm not worried about the provider going
out of business.

A nice apple story
 

On 11/20/11 11:16 AM, wrote:
On Sun, 20 Nov 2011 10:55:38 -0500, X ` Man
wrote:

That sounds like RAID 5. You don't really have a backup drive, the
data is striped across all four but you end up with one drive's worth
of overhead.




It is indeed a form of Raid 5. It allows me to have one of the four
drives go teats-up and be replaced without losing data. At least, that's
my understanding of what it is.


Yes that is how it works, as long as you only have one bad drive.
Generally one drive can support up to 11 in an array as I recall.
There is a scheme where you can have 11 supported by 2 drives and you
can lose 2. That was what the RAMAC used.


I just happen to have a fifth 2 terabyte hard drive sitting in its
sealed case on a shelf, just in case one of the drives in the Synology
server goes teats up.