Moderator: E.J. Peiker

All times are UTC-05:00

  
« Previous topic | Next topic »  
Reply to topic  
 First unread post  | 16 posts | 
by Neilyb on Mon Dec 05, 2016 3:37 am
User avatar
Neilyb
Forum Contributor
Posts: 2763
Joined: 7 Feb 2008
Location: Munich
I recently stumbled upon this product https://www.glyphtech.com/product/atom-raid-ssd  which is simply 2x500GB SSDs running Raid 0. Wow, I thought, creates two backups from a single copy (perfect for those wildlife trips shooting at 10-12fps :) ). Unfortunately I cannot find a comparable product in Europe :( any ideas, an external USB caddy maybe that can do the same?
 

by Jens Peermann on Mon Dec 05, 2016 6:56 am
User avatar
Jens Peermann
Forum Contributor
Posts: 5155
Joined: 5 Apr 2004
Location: Lake Tahoe area of Nevada
Neilyb wrote:I recently stumbled upon this product https://www.glyphtech.com/product/atom-raid-ssd  which is simply 2x500GB SSDs running Raid 0. Wow, I thought, creates two backups from a single copy (perfect for those wildlife trips shooting at 10-12fps :) ). Unfortunately I cannot find a comparable product in Europe :( any ideas, an external USB caddy maybe that can do the same?
Raid 0 has no redundancy. It just combines the two 500 GB drives into a single 1TB volume. What you want is Raid 1, where the two drives mirror each other. Usually those combos have hardware Raid and it can be re-configured to a Raid 1 by changing a switch setting. Check with the supplier if that is the case with this offer.

I have not seen any empty Enclosures that have Hardware Raid (which doesn't mean they don't exist). But if you have a MAC that runs on OS X 10.9 or earlier you will be able to configure external drives to Raid 0,1 and 5; even multiple single drives. Apple unfortunately dropped that capability from OS X 10.10 on. :twisted:
A great photograph is absorbed by the eyes and stored in the heart.
 

by E.J. Peiker on Mon Dec 05, 2016 7:57 am
User avatar
E.J. Peiker
Senior Technical Editor
Posts: 86776
Joined: 16 Aug 2003
Location: Arizona
Member #:00002
No, no, no!!!!!!!!  You are setting up for a disaster.  First, RAID 0 does not make two copies, it stripes a single copy across two drives so you can transfer data faster.  RAID 1 creates two copies but it is not a backup because any error on either drive is immediately replicated on the other causing you to lose both identical files on both drives.  RAID is NOT a backup strategy.  RAID is a keep working when you have a failure strategy and RAID 0 isn't even that.  RAID 0 is purely a performance strategy, there is ZERO redundancy or backup.
 

by E.J. Peiker on Mon Dec 05, 2016 8:00 am
User avatar
E.J. Peiker
Senior Technical Editor
Posts: 86776
Joined: 16 Aug 2003
Location: Arizona
Member #:00002
Jens Peermann wrote:I have not seen any empty Enclosures that have Hardware Raid (which doesn't mean they don't exist). But if you have a MAC that runs on OS X 10.9 or earlier you will be able to configure external drives to Raid 0,1 and 5; even multiple single drives. Apple unfortunately dropped that capability from OS X 10.10 on. :twisted:
As for an enclosure that has hardware RAID, OWC makes a number of them.  Here is one I have been using for several years and it is great:
https://eshop.macsales.com/item/OWC/M3QX2KIT0GB/
 

by Jens Peermann on Mon Dec 05, 2016 8:08 am
User avatar
Jens Peermann
Forum Contributor
Posts: 5155
Joined: 5 Apr 2004
Location: Lake Tahoe area of Nevada
E.J. Peiker wrote:
Jens Peermann wrote:I have not seen any empty Enclosures that have Hardware Raid (which doesn't mean they don't exist). But if you have a MAC that runs on OS X 10.9 or earlier you will be able to configure external drives to Raid 0,1 and 5; even multiple single drives. Apple unfortunately dropped that capability from OS X 10.10 on. :twisted:
As for an enclosure that has hardware RAID, OWC makes a number of them.  Here is one I have been using for several years and it is great:
https://eshop.macsales.com/item/OWC/M3QX2KIT0GB/

I think he's talking about portable enclosures/drives.

BTW, I have the Thunderbolt version of the drive you show, but it doesn't have Hardware Raid any more. I had to install SoftRaid for it.
A great photograph is absorbed by the eyes and stored in the heart.
 

by E.J. Peiker on Mon Dec 05, 2016 8:14 am
User avatar
E.J. Peiker
Senior Technical Editor
Posts: 86776
Joined: 16 Aug 2003
Location: Arizona
Member #:00002
Oh, yes, you are right.  Not sure why I would even want a portable RAID.
 

by Jens Peermann on Mon Dec 05, 2016 9:23 am
User avatar
Jens Peermann
Forum Contributor
Posts: 5155
Joined: 5 Apr 2004
Location: Lake Tahoe area of Nevada
E.J. Peiker wrote:Oh, yes, you are right.  Not sure why I would even want a portable RAID.
Convenience. To get two copies from one download. I do the same with an old MacBook (OS X 10.7) and two external drives.
A great photograph is absorbed by the eyes and stored in the heart.
 

by Neilyb on Mon Dec 05, 2016 9:45 am
User avatar
Neilyb
Forum Contributor
Posts: 2763
Joined: 7 Feb 2008
Location: Munich
Jens Peermann wrote:
E.J. Peiker wrote:Oh, yes, you are right.  Not sure why I would even want a portable RAID.
Convenience. To get two copies from one download. I do the same with an old MacBook (OS X 10.7) and two external drives.
Yes, two copies with one download would be nice my SP3 only has a single USB port. But I see my mistake, I was thinking Raid 0 was simply two mirrored drives. Of course errors would be mirrored, not just two separate copies. I will stick to two separate disks :)

Thanks all for the enlightenment, sometimes my brain freezes.
 

by Anthony Medici on Mon Dec 05, 2016 9:50 am
User avatar
Anthony Medici
Lifetime Member
Posts: 6879
Joined: 17 Aug 2003
Location: Champions Gate, FL
Member #:00012
Raid 1 is mirrored. Raid 0 is striped.
Tony
 

by Candew on Mon Dec 05, 2016 2:43 pm
Candew
Forum Contributor
Posts: 176
Joined: 24 Dec 2005
Location: Kansas City
Would something like this work?

http://www.cineraid.com/products/home_h212.htm
 

by Royce Howland on Mon Dec 05, 2016 3:01 pm
User avatar
Royce Howland
Forum Contributor
Posts: 11719
Joined: 12 Jan 2005
Location: Calgary, Alberta
Member #:00460
Even RAID 1 mirroring does not give "two copies"... at least not in the sense most of us mean when we're thinking about backups. A RAID 1 device has two replicas of the files it contains, but those replicas are physically and logically part of a single device. Short of cracking open the case and accessing the raw drives within it through some other interface, the two replicas are accessed as one, and are joined at the hip for whatever happens.

Many, many things that can physically or logically compromise or destroy a RAID 1 device most often will take out both replicas at the same time. This is why E.J., myself and others always say that RAID is NOT a backup solution. What it is, is a solution to minimize your operational downtime in the event that a single drive fails within the RAID device. (Or, in the case of RAID 0 which has no redundancy, it's not even an uptime solution... it's usually done strictly for performance reasons.) That's a useful thing in its own right, but it's not the same as traveling (or working at home base) with multiple independent copies that live or die on their own without any regard with what is going on with any other copies.

There are a number of small portable 2-drive cases around, including the CineRAID enclosure that Candew linked to. Many of these can be set up in JBOD mode so would make both internal drives available to transfer independent copies of data onto, without the use of any RAID automatic mirroring or striping behaviours. This is close to having two independent copies. But obviously with 2 drives inside a single case, there's still a range of things that can take out that enclosure and lay waste to both copies at the same time.

I'm personally looking at the Glyph Atom RAID units strictly for traveling performance reasons. If I used them, like any other storage device, I would have multiple of them with me to avoid having a single device copy of information...
Royce Howland
 

by Neilyb on Tue Dec 06, 2016 3:05 am
User avatar
Neilyb
Forum Contributor
Posts: 2763
Joined: 7 Feb 2008
Location: Munich
The CineRaid case looks like what I was thinking of, shall see if it is available in Europe. Thanks guys, would be lost without you ;)
 

by Royce Howland on Tue Dec 06, 2016 11:29 pm
User avatar
Royce Howland
Forum Contributor
Posts: 11719
Joined: 12 Jan 2005
Location: Calgary, Alberta
Member #:00460
It's not very portable, but I'd love to have a few of these:
https://www.synology.com/en-us/products/FS3017

:) :)
Royce Howland
 

by Neilyb on Wed Dec 07, 2016 2:44 am
User avatar
Neilyb
Forum Contributor
Posts: 2763
Joined: 7 Feb 2008
Location: Munich
I have enough trouble keeping my PC and a few HDD's backed up and running :)
 

by Royce Howland on Wed Dec 07, 2016 10:17 am
User avatar
Royce Howland
Forum Contributor
Posts: 11719
Joined: 12 Jan 2005
Location: Calgary, Alberta
Member #:00460
I know. Inside much of my technology, there are small demons that smile cruelly and exchange knowing glances with each other, every time I say "Okay, I think I've got this figured out now." :)
Royce Howland
 

by Ed Cordes on Thu Dec 08, 2016 8:57 am
User avatar
Ed Cordes
Forum Contributor
Posts: 4903
Joined: 11 Mar 2004
Location: Corning, NY
Member #:00700
I have not used any type of RAID in years. About 10 - maybe more - years ago I had 2 disks set up with RAID so they would be stripped as one large drive. One drive failed and I lost access to both! Never again will I do that. Fortunately, I had a good back up. I now use JABOD and maintain an off site back up as well.

Royce, I love your comment about your demons. I think their cousins live in my stuff.
Remember, a little mild insanity keeps us healthy
 

Display posts from previous:  Sort by:  
16 posts | 
  

Powered by phpBB® Forum Software © phpBB Group