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Old Apr 25, 2013, 03:35 AM   #26
TheBSDGuy
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I don't think Scannerz is ugly, it's just utilitarian. So what? All updates to their products are free of charge, whereas others charge almost half what the original price of the product was, and they always manage to have some sort of critical update every year or every six months.
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Old Apr 30, 2013, 12:55 PM   #27
ZVH
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There was an interesting discussion on ArsTechnica somewhat along these lines.

SSDs need to completely overwrite their cells before they can be re-written again, and defragmentation doesn't exist. What does this mean?

It means to some extent tools like TechTool Pro and Drive Genius are heading toward obsolescence. SSD "clean up" routines kill the ability to recover data, so that function's gone. Defragging on an SSD is not needed (and debatable if it was ever needed).

Smaller specific tools like Disk Warrior, Scannerz, smartmon tools are still of use, but more expensive and well known tools may be on their way out.
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Old Jun 2, 2013, 02:35 PM   #28
grahamperrin
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Quote:
Originally Posted by MacRobert10 View Post
… all I could tell was that this more or less extended SMART for stuff like Disk Utility. …
OS X normally can not read S.M.A.R.T. data from all types of S.M.A.R.T.-enabled hardware.

The kernel extension allows S.M.A.R.T.-enabled software to work with S.M.A.R.T. data on a wider variety of hardware.
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Old Jun 28, 2013, 05:19 AM   #29
ZVH
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I updated the entry for Scannerz today because they added a product called Phoenix to the line up.

NOTE TO CURRENT SCANNERZ USERS:

This update is free, so if you own the current Scannerz w/FSE or FSE-Lite the update is free because it's now part of the package. Check your e-mail. That's how I found out. Scannerz-Lite users are out of luck.

Phoenix is a cool tool because it can extract the core operating system without the need for media and put it on another drive or you can create what they call a Phoenix Boot Volume, which acts almost like an original operating system install. The only complaint I'd have is that the progress bar is task based rather that copy based, so if you're cloning something and it hits a large folder, like the Users or Applications folder it looks like it's locked up. Aside from that it works great.

Also I noticed that Techtool Pro has a new release, but it looks to me like it's just a version number enhancement that you have to pay for. I don't use that tool so maybe someone familiar with it can provide details.
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Old Jul 19, 2013, 03:32 PM   #30
alvarnell
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Quote:
Originally Posted by grahamperrin View Post
In Super User: How to check whether there is bad sector on a USB harddisk on OS X?

In an answer there:

Quote:
OS X SAT SMART Driver

… a kernel driver for Mac OS X external USB or FireWire drives …
I've been trying this and it is working for some externals, but not all. It would still appear to be in pre-release, but it's worth noting that Smart Utilities now includes it as an optional install and TTP may be on the verge of doing something similar.

Many of the comments here concerning S.M.A.R.T. monitoring have been correct in that most utilities simply report out on one or a few of the parameters stored on the hard drive, but the advantage of a few, such as Smart Utility, are that they then apply their own proprietary analysis routine to predict over time if there is evidence of eminent failure.
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Old Aug 1, 2013, 04:49 AM   #31
TheBSDGuy
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If you use Mountain Lion or Lion, the "Info" button on Disk Utility reports more SMART status than it used to, FWIW. Before all it said was "verified" now it gives a more detailed report.
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Old Aug 15, 2013, 09:40 AM   #32
ZVH
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The guys who make Scannerz just updated the product again so I modified the description to add Performance Probe, which is the new add-on tool. I use this tool which is why I'm aware of it.

It would be nice if someone who uses some of the other tools could add info about some of the other tools like Drive Genius or Tech Tool Pro. I haven't used Tech Tool Pro in over 5 years so I don't feel qualified to comment on it but I do know it's been updated several times since I last used it.
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Old Sep 19, 2013, 01:02 PM   #33
MacRobert10
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I did a comparison test of Scannerz vs. TechTool Pro on a known good drive. Scannerz completed it in almost half the time. I did a test on a drive with a known bad sector. Scannerz picked up the bad sector as well as several weak sectors preceding it. TechTool Pro didn't even see it. Even the system's log files indicated there was an error.

I assume the strength of something like TechTool Pro is that it does other things besides drive tests, right?
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Old Feb 7, 2014, 08:30 AM   #34
runswithsizzers
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Quote:
Originally Posted by MacRobert10 View Post
I did a comparison test of Scannerz vs. TechTool Pro on a known good drive. Scannerz completed it in almost half the time. I did a test on a drive with a known bad sector. Scannerz picked up the bad sector as well as several weak sectors preceding it. TechTool Pro didn't even see it. ---(snip)...
Good to know. Can anyone report on Scannerz vs. Checkmate?

Or maybe you just did. It's not clear to me if Checkmate is just the disk part of TTP or a completely unrelated utility.

I have an external drive (Glyph) which I use for for back ups (SuperDuper on one partition, Time Machine on the other). Because I've been getting frequent errors with my backups, I sent the drive back to Glyph. After 3 weeks of testing, they found no problems. I'm guessing their procedures are of a higher level than what I could do myself with the utilities mentioned here?
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Old Feb 7, 2014, 01:17 PM   #35
giffut
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I ...

... had mixed success with DiskWarrior and DriveGenius, but I definitely can recommend Disktools Pro:

http://www.macwareinc.com/products/m...tools-pro.html

I used it running 10.6, 10.8 and 10.9, and it helped me occasionally.

From the webpage:

Quote:
Mac defrag to defragment your files
Create bootable Mac backups
Find and fix bad disk sectors on your Mac
Repair volumes
Receive S.M.A.R.T. alerts
Utility to test disk integrity
Benchmark your volumes
Analyze drive capacity
Repair damaged preference files
Monitor your CPU
Find and repair broken aliases
And more...
Schedule
Easily schedule when to defragment files, repair bad sectors and backup your volume. Many utilities hog your system resources when running, and cause problems if you are trying to work on your computer during the process. DiskTools Pro allows you to run these critical tools overnight or at any other time that you are away from your Mac. You can even set it to shutdown or put your system to sleep when complete.

Defragment Your Files
The more you use your Mac, the more your files get fragmented. This creates more work for your computer as it puts files back together again for use. DiskTools Pro safely defragments your files to keep your Mac up to speed.

Create Bootable Backups
Easily copy an entire volume to another destination to keep your system safe. DiskTools Pro creates bootable backups of your hard disk that can be used to create disk clones, move your running operating system from one disk to another (for example, when replacing a hard disk), or to backup system folders individually.

Supports Multiple Volumes
Run DiskTools Pro on as many volumes as you want simultaneously. This will save you time from having to run tests or repair multiple volumes one at a time.

Fix Bad Sectors
Easily find and fix defective sectors on volumes or in individual files

Repair Volumes
Quick repair when your applications, files or system are not working right QuickBench®
Measure the read and write speeds over an entire local storage device

S.M.A.R.T. Alerts
Receive an alert if a drive is about to fail so you can save your files or backup

Stress Test
Test disk integrity to make sure it can handle your workload and remain stable

No Boot CD
Run nearly every tool on your boot volume without having to un-mount it first

Benchmark testing

Test data transfer integrity

Analyze drive capacity to free space on your Mac

Repair and maintenance logs

Fix and repair multiple volumes simultaneously

Run tools on startup volume without a boot CD
I also would include Onyx, as it streamlines some OSX maintenance tasks:

http://www.titanium.free.fr
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Old Apr 11, 2014, 07:26 PM   #36
ZVH
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I updated this post to include the following changes:
  • Addition of Disk Tools Pro as described by giffut (Feb. 7, 2014)
  • Changes in prices to Scannerz line of products

I'm not at all familiar with Disk Tools Pro so I put a note in the description to refer to the write up by giffut. Scannerz has a new diagnostics mode, so I put some details in about that too. Their prices also went up a few bucks.

I didn't put Checkmate or Onyx in because I see them more as system monitoring tools and not really being drive related tools.
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Old Apr 14, 2014, 01:17 PM   #37
tvalleau
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directory repair

I should point out that both DriveGenius and TechTool Pro have a directory rebuild feature, similar to what is achieved by DiskWarrior. In my own experience DW uses a superior technique(s) to the other two, but in the initial posting here, that feature was left off both of them, and I thought I should correct that.

Further, Alsoft has had 5 years to make DW into a 64-bit app, and has failed to do so. For those of us with large hard drives and many files (in my case, over 4M) the 32-bit limitation to memory causes DW to fail, and it is unable to work on such drives at all.

Both DriveGenius and TechTool Pro are 64-bit applications, and will successfully work on larger, more full drives. I'd prefer DW of course, but these two are better than nothing when a big drive goes south.
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Old Apr 14, 2014, 10:14 PM   #38
ZVH
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I'll update the post with that information. The last copy of TTP that I had was for PowerPC systems and I don't think it had any type of file recovery on it at that time. Maybe it did and I just didn't need it or I've forgotten. That's a long time ago.

Thanks for the input.
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Old Apr 14, 2014, 11:07 PM   #39
tvalleau
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Originally Posted by ZVH View Post
I'll update the post with that information. The last copy of TTP that I had was for PowerPC systems and I don't think it had any type of file recovery on it at that time. Maybe it did and I just didn't need it or I've forgotten. That's a long time ago.

Thanks for the input.
Note that it's not "file recovery" I mentioned... it's directory reconstruction. They are two different things.
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Old Apr 16, 2014, 03:08 PM   #40
n6ac
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TestDisk, Disk Drill, iBored

Here is a useful command-line utility -
TestDisk & PhotoRec documentation can be found online:
- http://www.cgsecurity.org/wiki/TestDisk
- http://www.cgsecurity.org/wiki/PhotoRec

----------

Disk Drill can scan and recover data from virtually any storage device
http://www.cleverfiles.com/

----------

iBored
It is basically a hex editor for disk sectors, but can also be used to edit files, including disk images.
http://apps.tempel.org/iBored/

Last edited by n6ac; Apr 16, 2014 at 03:11 PM. Reason: better title
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Old Yesterday, 01:32 PM   #41
TheBSDGuy
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A lot of the "recovery software" will be 100% useless on SSDs because of the way the drives store data. On an HD the contents of a block are still intact even after being deleted, at least for a while, because all the controller does is mark them as being available for re-write. Recovery can take place because these blocks can be read.

On an SSD if it's marked for deletion, it's usually completely removed from available blocks and then the block(s) are purged to binary zeros before being put back in service. This could happen at any time, particularly if TRIM/GC are enabled to occur as a background process.

Likewise, defragmenting an SSD is utterly useless since fragmentation is an artifact of the mechanical drive heads moving around the surface of the drive. It's even questionable how much its needed on OS X even with mechanical drives.
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