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[TechReport] Seagate's 4TB "PORTABLE" hard drive requires only USB power - Page 2

post #11 of 32
Quote:
Originally Posted by Frost View Post

Not sure how stupid of a question this is... If they are 2 2TB drives in Rad 0 does that not mean the total disk space is actually 2TB not 4? It is using both as one, striping data between them. It says it is 4TB's so that confuses me..

Raid 0 works by striping the data across the drives.

Writing a file ends up looking like this Block 1 -> Disk 1 Block 2 -> Disk 2

The reason RAID 0 increases performance is because you are simultaneously writing and reading multiple blocks of data on ALL disks simultaneously on any given write / read command. The capacity of a RAID 0 array is additive, the capacity of a RAID 1 array (Mirroring) which I think is what you were thinking of, is not.
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post #12 of 32
That makes sense, thanks for answering.
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post #13 of 32
Quote:
Originally Posted by John Shepard View Post

Don't trust seagate enough for something like this.

don't trust them full stop - or maybe they might have moved on? biggrin.gif
post #14 of 32
I wonder if you could switch this to a RAID 1... That's always been my concern with externals. I don't trust that they'll last long enough to use them...
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post #15 of 32
Thread Starter 
Ive had so many WD fail that I refuse to buy them. Now all my hard drives are Seagate. All working fine! but everyone has different luck with hard drives.
post #16 of 32
Quote:
Originally Posted by Frost View Post

If they are 2 2TB drives in Rad 0 does that not mean the total disk space is actually 2TB not 4? It is using both as one, striping data between them. It says it is 4TB's so that confuses me..

With RAID 0, total capacity is the sum of the parts so 4TB is correct.
     
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post #17 of 32
Quote:
Originally Posted by John Shepard View Post

Don't trust seagate enough for something like this.

Same here. I also eschew new technology until it's been out for a while. I prefer to let others be the Guinea Pigs.
     
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post #18 of 32
Quote:
Originally Posted by hatlesschimp View Post

Ive had so many WD fail that I refuse to buy them. Now all my hard drives are Seagate. All working fine! but everyone has different luck with hard drives.

I've had only one WD fail and I have had 13 of them. I've had two Seagates fail on me (and one that was a disappointment) and I've own only four of them. Seagate's customer record has been less than stellar while WD has a good reputation. WDs also can be had with much longer warranties.

But, as you pointed out, ymmv.
     
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post #19 of 32
Not sure I would favour this as a backup drive for important files, not in a RAID 0 Array. Not the most sensible choice for backups, a shame really.
post #20 of 32
Quote:
Originally Posted by ENTERPRISE View Post

Not sure I would favour this as a backup drive for important files, not in a RAID 0 Array. Not the most sensible choice for backups, a shame really.

It's not really a big issue since a backup is just that.

The concern is more if your primary, backup, backup, and/or archive all died at the same time.
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