Digital BW, The Print

I use Raid ) for my C drive with two fast 10K rpm Seagate drives.   This
give very fast start up, and program loads etc.    I really don't keep
anything on these drives but the operating system and program files.
Program files load instantly?     Additionally I have another pair of 120gb
drives that I use for working files and scratch disk.   All data is store
separately on a 1TB Lacie Firewire 800 drive.

 

Regards,

Paul

 

-----Original Message-----
From: DigitalBlackandWhiteThePrint@yahoogroups.com
[mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of Roger L
Sopher
Sent: Monday, April 23, 2007 4:18 PM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: RE: [Digital BW] Re: OT: Computer Hard Drive & Backup Management

 

No question raid 0 doesn't add any degree of security to your data; If any
thing security would be somewhat reduced compared to a single drive since
you have two drives at risk. Raid 1 gives security but it can be at the cost
of speed. If you want both an increase in performance AND and increase in
security then one needs a raid 5 set up which will require at least 3 drives
and an interface board that supports it. Raid 5 is great since a drive can
drop out and be replaced by a fresh drive "on the fly" but it is pricey. 

For most, having an external drive on to which you can off load your files
is the least expensive solution. That would work well with a raid 0 basic
set up. If one of the raid drives goes south then both can be replaced and
then reconstituted from the back up drive. 

On the other hand if one has a a large collection and needs "fail safe"
storage that has very limited downtime potential then it probably would be
reasonable to invest in a raid five file server.

Just my 2 cents worth

Roger

Roger L Sopher 
rlsopher@mac. <mailto:rlsopher%40mac.com> com 
http://deCorrales. <http://deCorrales.com> com <http://decorrales.
<http://decorrales.com/> com/> 

_____ 

From: DigitalBlackandWhit
<mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com>
eThePrint@yahoogroups.com
[mailto:DigitalBlackandWhit
<mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com>
eThePrint@yahoogroups.com] On Behalf Of David
Gumbrell
Sent: Monday, April 23, 2007 6:00 PM
To: DigitalBlackandWhit
<mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com>
eThePrint@yahoogroups.com
Subject: Re: [Digital BW] Re: OT: Computer Hard Drive & Backup Management

Hi,

I learned the hard way, it is not safe to rely on RAID to protect your data,
you must have other backups.

If you buy a pair of identical drives to build your array, most likely at
the same time, you have a higher chance of a double failure because of batch
failure probabilities. In addition, after a single drive failure the act of
rebuilding onto the replacement drive can tip the second drive "over the
edge" due to the extra activity involved in rebuilding the array. Also, RAID
cannot protect you against accidental deletion or rogue software corrupting
files. Another potential gotcha with RAID is what happens if your
motherboard dies - can you be sure that the replacement will recognise your
disks from the previous machine as a RAID set ?

As I said, I learned the hard way - one drive in my RAID array failed, and
the other failed 3 hours later, before I had time to get a replacement drive
and rebuild the array.

The only answer is backups. All backup technologies have their limitations,
I back up to external hard disks regularly and archive important stuff to
DVDs slightly less regularly. I also have a ReadyNAS device which is a RAID
device with upto 4 disks that acts as one large network drive - I still use
RAID because it can reduce downtime in the case of a disk failure. There is
also the option of offsite web-based backups. I have only just started
looking at this and can't make any recommendations.

Cheers,

David

On 4/23/07, Alan Kearney <alan_kearney@
<mailto:alan_kearney%40sbcglobal.net> sbcglobal.net> wrote:
>
> Michael, I'm another Alan and my PC used a different form of a RAID
> setup
> than Alan Ansell talks about. His description of a "RAID" does indeed
> protect your data because you automatically make 2 copies, one on each
> drive, of everything! Basically one drive is a mirror of the other drive.
> You don't gain any speed from this setup but you do gain a great deal of
> security, especially if you don't backup on a regular basis - many people
> don't:-)
>
>
>
> _____
>
> From: DigitalBlackandWhit
<mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com>
eThePrint@yahoogrou <mailto:eThePrint%40yahoogroups.com>
ps.com<DigitalBlackandWhiteThePrint%40yahoogroups.com>
> [mailto:DigitalBlackandWhit
<mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com>
eThePrint@yahoogrou <mailto:eThePrint%40yahoogroups.com>
ps.com<DigitalBlackandWhiteThePrint%40yahoogroups.com>]
> On Behalf Of Michael-K
> Sent: Monday, April 23, 2007 9:59 AM
> To: DigitalBlackandWhit
<mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com>
eThePrint@yahoogrou <mailto:eThePrint%40yahoogroups.com>
ps.com<DigitalBlackandWhiteThePrint%40yahoogroups.com>
> Subject: [Digital BW] Re: OT: Computer Hard Drive & Backup Management
>
> Thanks, Alan. Regarding the Raid setup, are the "real world" benefits of
> this route really worth the time/trouble to set it all up? Can you provide
> a
> nutshell summary of what these benefits are? Thanks.
>
> -Michael K
>
>
>

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