mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Hardware

Reply
 
Thread Tools
Old 2014-03-09, 00:00   #1
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

11×853 Posts
Default USB drive recommendation (ideally USB powered)

I have purchased a DVR that has a limited amount of internal storage. It will work with a USB external drive. Can anyone recommend a good external drive for a decent price? Ideally it would be USB powered and quiet.
Uncwilly is offline   Reply With Quote
Old 2014-03-09, 02:26   #2
kladner
 
kladner's Avatar
 
"Kieren"
Jul 2011
In My Own Galaxy!

27AC16 Posts
Default

Quote:
Originally Posted by Uncwilly View Post
I have purchased a DVR that has a limited amount of internal storage. It will work with a USB external drive. Can anyone recommend a good external drive for a decent price? Ideally it would be USB powered and quiet.
Here is one possibility on a 1 TB unit-
http://store.westerndigital.com/stor...oryID.64062500

Note that in the WD external lines, you might want to avoid the Passport Ultra and Passport Slim. These include hardware encryption. I have seen many complaints on the forums about data lost due to a failed chip on the controller board. It is difficult, and/or expensive to recover from an encryption failure.

Here is a twice as large Seagate USB 3 powered for about the same price-
http://www.amazon.com/Seagate-Expans...4331741&sr=1-4

Sorry for the Amazon referrals. I actually don't use them any more, but it's an easy place to look things up. I don't know about encryption on these. I would strongly advise against a unit with that feature.
kladner is offline   Reply With Quote
Old 2014-03-20, 00:35   #3
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

222478 Posts
Default

Quote:
Originally Posted by kladner View Post
Here is one possibility on a 1 TB unit-
Here is a twice as large Seagate USB 3 powered for about the same price-
Thanks for the info. I am buying the seagate 2TB unit.
Uncwilly is offline   Reply With Quote
Old 2014-03-21, 00:18   #4
petrw1
1976 Toyota Corona years forever!
 
petrw1's Avatar
 
"Wayne"
Nov 2006
Saskatchewan, Canada

107148 Posts
Default Portable vs External

For those more in-the-know than I am:
What is the difference between:
- External Hard Drive
- Portable Hard Drive
Aren't they both by definition Portable AND External.
Portable tend to be more expensive on Newegg but also seem to be smaller.
Is that it? Or is there more that is relevant to the following?

My though it using it as an offsite backup device.
Store all the important data on it then...
Take it to the office...
Keep it in a drawer in the office (unplugged)...
About once a month bring it home to make a fresh backup of the files I care about...
Take it away again.

P.S. Follow up question: My last External Hard Drive died after about a year of use.
- Files I can't access
- Very non-responsive at times
- VERY VERY long running chkdsk (weeks...)
- Even SeaGate's own tools get errors and could NOT repair the disk.
- In the end I couldn't even reformat it.

I have one theory what doomed it...please offer your votes:

It is stored on the same shelf, and about 6 inches away from my sub-woofer and power supply for my speaker system.
Could the magnets in it be messing up the hard drive?
Thanks

Last fiddled with by petrw1 on 2014-03-21 at 00:22 Reason: P.S....
petrw1 is online now   Reply With Quote
Old 2014-03-21, 00:36   #5
kracker
ἀβουλία
 
kracker's Avatar
 
"Mr. Meeseeks"
Jan 2012
California, USA

1000011110012 Posts
Default

I'm not sure as well, but there are internal drives that can be used "externally", as in SATA to USB. (Popular with internal SSD's nowadays converted to USB3)
kracker is offline   Reply With Quote
Old 2014-03-21, 00:50   #6
sdbardwick
 
sdbardwick's Avatar
 
Aug 2002
North San Diego County

2×11×31 Posts
Default

Generally:

Portable implies
1. USB [or other bus] powered (no external power brick)
2. Based on 2.5" laptop drives

External implies
1. Not necessarily bus powered - usually requires external power brick
2. Based on 3.5" desktop drives

Portable drives are generally more resistant to damage during transport, due to their use of laptop drives.

External drives really shouldn't be moved regularly without taking precautions to guard against impacts.

Re: External drive failure
Magnetic field from speakers/amp not strong enough to affect HDD (corner cases like massive old amps with huge transformers possibly excepted). The vibrations from the subwoofer could contribute to failure. Also, the bundled power bricks might produce crappy (noisy or out-of-spec voltage) power output.
sdbardwick is online now   Reply With Quote
Old 2014-03-21, 05:22   #7
petrw1
1976 Toyota Corona years forever!
 
petrw1's Avatar
 
"Wayne"
Nov 2006
Saskatchewan, Canada

10001110011002 Posts
Default

Thanks sdb.
petrw1 is online now   Reply With Quote
Old 2014-03-21, 06:08   #8
LaurV
Romulan Interpreter
 
LaurV's Avatar
 
Jun 2011
Thailand

52×7×53 Posts
Default

Adding to what sdb said: the common sense is that the two classes are not included into each other. Portable is not necessary external (think hot-swap bays) and external is not necessary portable (beside of separate power supply): we have here a backup system which is half meter tall and it has about 40kg. It is essentially a battery of external harddisks, but I don't see myself wondering around with those things in my pocket...
LaurV is offline   Reply With Quote
Old 2014-03-21, 21:35   #9
CRGreathouse
 
CRGreathouse's Avatar
 
Aug 2006

2·29·103 Posts
Default

Quote:
Originally Posted by sdbardwick View Post
Magnetic field from speakers/amp not strong enough to affect HDD (corner cases like massive old amps with huge transformers possibly excepted). The vibrations from the subwoofer could contribute to failure. Also, the bundled power bricks might produce crappy (noisy or out-of-spec voltage) power output.
I agree.
CRGreathouse is offline   Reply With Quote
Old 2014-03-21, 22:05   #10
f1pokerspeed
 
Jun 2012

2×53 Posts
Default

Have you tried SpinRite on the broken HDD?
f1pokerspeed is offline   Reply With Quote
Old 2014-03-22, 14:57   #11
cheesehead
 
cheesehead's Avatar
 
"Richard B. Woods"
Aug 2002
Wisconsin USA

22×3×641 Posts
Default

AIUI:

In general, a portable drive means it has its own outer housing/case.

Some external drives don't include their own case, which must be provided separately. (Why would a manufacturer market it that way? Rack-mount)

The above applies to drives that need more than USB current, but for USB drives "portable"/"external" might have a different connotation.

Last fiddled with by cheesehead on 2014-03-22 at 15:01
cheesehead is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Laptop recommendation wombatman Hardware 8 2015-11-15 16:57
:down: recommendation? bsquared YAFU 9 2012-04-11 19:34
System Recommendation drh Hardware 21 2011-05-21 01:39
CPU cooling system recommendation esqrkim Hardware 5 2010-03-27 16:30
Opteron ideally suited for multiprocessing GP2 Hardware 2 2004-01-14 07:30

All times are UTC. The time now is 22:57.

Mon Mar 8 22:57:02 UTC 2021 up 95 days, 19:08, 0 users, load averages: 1.02, 1.36, 1.64

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.