DiskRefresher
DiskRefresher
1.2

0.0

DiskRefresher free download for Mac

DiskRefresher

1.2
13 July 2011

Refresh multiple external disk drives safely and simply.

Overview

DiskRefresher is ideal for users who need to refresh multiple external disk drives safely and simply. Hard disk drives are designed to be used regularly, not stored on a shelf for months or years. The magnetic strength of the digital bits recorded on a drive slowly decays when that drive is disconnected from a computer. After many months, this effect can cause data files to fade, sometimes becoming unreadable. DiskRefresher makes the time-consuming process of refreshing multiple, external disk drives simple and safe. At launch, DiskRefresher lists the external storage drives you have mounted and shows each drive's storage capacity. You can select one or several drives to be refreshed and you can drag a drive up or down in the queue window to adjust the refresh order.

What's new in DiskRefresher

Version 1.2:
  • Minor bug fixes.

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5 DiskRefresher Reviews

Rate this app:

Flavum
11 April 2011

Most helpful

Can anyone direct me to something more than the anecdotal evidence provided by the developer of hard disk data "fading" over time (like actual research or a study of some kind)? It would seem to me that either the data is intact, or it isn't. Corrupt data needs recovery software - does this app provide that feature? Exactly what does it do when it discovers disk problems? Sounds a bit sketchy, but I'd love to be proven wrong by a clearer, more informative description.
Like (3)
Version 1.1
Stilgar
18 February 2016
This is old discussion, but I will comment anyway. This phenomenon is real. Drives store bits using magnetism. Over time the strength of the magnetic signal weakens. Eventually it will weaken to the point where it cannot be read by the drive head. When you're using your hard drive and it's reading data back it is also measuring the strength of the magnetic signature. If it finds that the signature is weakening it will re-write the data back to restrengthen the magnetic signature. If this happens once in a while, no big deal. As your data ages on your hard drive this can be happening all the time. Now imagine the performance impact of your drive not only reading data, but rewriting nearly everything it's reading. It slows things down. This is often why people say a format and reinstall improves their computer performance, because they worked around this issue on their own without realizing it.

Interestingly enough, there is a similar circumstance with SSDs. They store electricity in cells instead of using magnetism. The cells hold charges with an insulator. Over time, the electrical charge "leaks" out of the cell and the SSD, detecting the issue, has to rewrite the data to restore the charge. This is also how SSDs wear out. Each time you force a charge through the insulator, the insulator is weakened a little bit more. Eventually it can't hold enough of the charge for the drive to read back out and that cell is then "bad".
Like (1)
Version 1.2
Macrob
13 July 2011
I can't say if this software works or is necessary, but I have heard of bit rot before. Usually I just make backups of the things I know I can't lose on DVD. My question is, how this software forces a refresh. Does it run like a surface scan? Meaning does it refresh the whole disk, even the free space? And does it read the disk, or volumes? Can I run it on a disk that is not OSX compatible? (I understand the hardware has to be compatible) I have some hard drives that have old amiga volumes, a next hard drive, and a few windows drives.
Like
Version 1.2
1 answer(s)
Macrob
Macrob
13 July 2011
http://en.wikipedia.org/wiki/Bit_rot
Like
Borlox
13 July 2011
This is the biggest crock I've ever heard of. It's outrageous that such an obvious scam was allowed on the App Store.
Like (2)
Version 1.2
3 answer(s)
hwgray
hwgray
13 July 2011
I agree! As for "research" or a "study," Larry Jordan doesn't even CLAIM that anything on his site is anything more than his own understanding plus his own interpretation of stuff that he's read about and/or has chatted with people about. He is no part of a computer-scientist and doesn't claim to be one. As for the referenced article on HD "decay," I couldn't find it on Jordan's site. Borlox writes, "WAS allowed." Has the App Store gotten rid of it?
Like
Robotank
Robotank
14 July 2011
The article on the Larry Jordan site now appears to be here: http://www.larryjordan.biz/technique-refreshing-hard-disk-storage/ It's an interesting read. I don't know much about this phenomenon, so I will offer no opinion on this app's value. From some very brief research, my sense is that the issue is real, but most users will never be affected by it. If you're storing important data on drives that will be powered off for a long time (i.e., over a year), it may be worth looking into further. In any case, the linked article explains a couple of techniques for performing a data refresh using Terminal.
Like
TomLoredo
TomLoredo
10 July 2017
According to this 2016 PC World article, the phenomenon is real:

http://www.pcworld.com/article/2984597/storage/hard-core-data-preservation-the-best-media-and-methods-for-archiving-your-data.html
Like
Flavum
11 April 2011
Can anyone direct me to something more than the anecdotal evidence provided by the developer of hard disk data "fading" over time (like actual research or a study of some kind)? It would seem to me that either the data is intact, or it isn't. Corrupt data needs recovery software - does this app provide that feature? Exactly what does it do when it discovers disk problems? Sounds a bit sketchy, but I'd love to be proven wrong by a clearer, more informative description.
Like (3)
Version 1.1
2 answer(s)
Pubblog.com
Pubblog.com
11 April 2011
There's a link to an article about disk data fading on the web site and the help screen. Here it is: http://www.larryjordan.biz/articles/lj_hard_disk_warning.html
Like (1)
truthhurts
truthhurts
13 July 2011
Said link does not exist. Data is binary - it's there, or it's not. "Refreshing" is simply misleading BS.
Like (1)
Lvdoc
11 April 2011
I tried going to the developer site, but got this message: Too many redirects occurred trying to open “http://www.macupdate.com/developer_site/38057/diskrefresher.com”. This might occur if you open a page that is redirected to open another page which then is redirected to open the original page But, hey, I'll be sure to give you guys $6, sight unseen. Any chance of a demo? Or do those not exist anymore since the advent of the App Store?
Like (1)
Version 1.1
1 answer(s)
Pubblog.com
Pubblog.com
11 April 2011
That is a problem with how MacUpdate links to the site. Here is the link to the site: http://diskrefresher.com
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$5.99

0.0

App requirements: 
  • Intel 64
  • Mac OS X 10.6.8 or later

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