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Need advice on hard drive/optical drive testing software

I've been tasked to sell some of our inventory of old Macs. This include some PowerPC based PowerBooks, a few G5 dual core Power Macs, but mostly they're going to be MacBook Pro's, iMacs, and Mac Mini's. I'm paying most attention to the Intel stuff because most of the PPC stuff is just getting a little too old. NOTE: I am not on here to announce a sale. Please do not ask me where, when, and if the units will be sold. I don't want this thread turning into a spam-fest!


Most of the Intel units have CoreDuo processessors, some of the mini's I believe actually have Core Solo. These are all being upgraded to new systems, as you might guess. All units have their original software because when these are given to an employee to use we take the software and lock it in a file cabinet, which prevents them from losing it or doing something else with it. We have fairly tight control over our machines. I do not believe any of these units are capable of running Lion or later OSes due to their processors. Most systems are running Leopard or Snow Leopard.


In any case, we can do basic hardware tests on the units using AHT, but AHT seems to have little or no testing capability for doing surface scans on hard drives or optical drives. These are, ironically, the most likely things that will break. We want it verified these are in working order because we will be offering a limited warranty on them.


What's available for testing hard drives and optical drives?


As an FYI, having Apple do this testing is out of the question due to cost.

Posted on Sep 28, 2013 6:29 PM

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169 replies

Feb 4, 2015 2:24 PM in response to ThomasB2010

ThomasB2010 wrote:


After searching a while it seems to me that the only way to test an optical drive would be to install a bootcamp partition on the system, boot Windows, and get some tools for Windows. Testing optical drives is obviously not something done on Mac's much.


Installing a bootcamp partition to run something like a manufacturers optical drive testing software may not work. The software likely needs direct access to the hardware and the controllers on the optical drive, and running through bootcamp may disallow this. I don't know that for a fact, but it's something to be aware of as a possibility.


Considering that Apple isn't selling ODs on most of their units any longer, I doubt you'll see anyone developing anything to test them. Why would they?

Feb 7, 2015 12:23 AM in response to CaptH

I question that comment on a bootcamp based Windows not being able to access hardware properly. If that was the case a lot of games that make low level calls to video hardware wouldn't work, but they do. The only way to probably know for sure is to find someone that's done it or just try it yourself.


Another thing: A Mac can be made into a completely Windows based machine, so if worse came to worse it could be installed on another drive and booted from that natively.

Feb 9, 2015 2:44 PM in response to CaptH

You wouldn't catch me using Windoze in a thousand years. Also, I thought they still used MBR and the boot 0 drive, the one that's in the system and seen as the first drive needs to have the Windows boot stuff. That can't be done on an external disk to the best of my knowledge, so that means you need to open the system up and replace the drive. That's a lot of work just to run an optical disk diagnostic.


I'm no Windoze expert and I'm not going to be, so if there are other ways to deal with Windoze in a Mac, forgive me for not knowing, or for that matter, not caring about it.

Feb 10, 2015 11:25 AM in response to ThomasB2010

From the boot camp install doc located at:

http://manuals.info.apple.com/MANUALS/1000/MA1583/en_US/boot_camp_install-setup_ 10.7.pdf


is the following quote:


  • Your Mac’s disk must be an internal disk. You cannot use Boot Camp Assistant to install Windows on an external disk.
  • If you have a Mac Pro with more than one internal disk and you want to install Boot Camp on a disk that isn’t in the first hard drive bay, remove the drives in the lower numbered bays. You can reinstall the drives after you install Boot Camp.


That's from the 10.7 version of bootcamp. I'm assuming it hasn't changed. Sounds like a lot of work to me!

Feb 23, 2015 5:28 PM in response to ThomasB2010

You seem to be focusing mostly on the mechanical parts of the optical drive when the optical parts are those that fail and are problematic. When was the last time you saw an optical drive fail because of a positioning error? It rarely happens. The optics burn out long before that can even happen. If I was interested in pursuing testing optical drives, what I would want to examine is how good is the data being read and more importantly, written to media, and this assumes your using good media, not some of the junk so commonly associated with optical drives.


There are too many variables associated with the optical drive itself, throw in a bunch of media with variable quality ranges as extreme as nice sunny day to raging hurricane, and the waters just get muddied even more. I really just can't see testing an optical unit properly, except under some type of laboratory conditions.

Feb 25, 2015 6:46 PM in response to MrJavaDeveloper

There are too many variables associated with the optical drive itself, throw in a bunch of media with variable quality ranges as extreme as nice sunny day to raging hurricane, and the waters just get muddied even more. I really just can't see testing an optical unit properly, except under some type of laboratory conditions.

Here, Here!!


I can see testing SSDs and HDDs but optics are a waste of time. I know there are archive quality optical media that are good, maybe even excellent, but the whole market seems to have been over run with such shoddy media and now maybe even drives, can it be trusted? If someone could provide me some type of link to a burner that's guaranteed to at least be reliable for a certain number of hours or writes or whatever, then it might be worth looking at, but these drives are now being sold in stores for less that $20 so how good are they?


I might add, I don't think it was any accident that some manufacturers are completely phasing optical drives out of their product lines.

Mar 13, 2015 10:53 AM in response to ThomasB2010

SMART technology is about as good as a thermometer is for detecting illness. WIth a thermometer, if you have a fever, it indicates you're sick, but how sick? Do you have a simple cold of flu, or do you have Ebola? If you have no fever, does it mean you're not sick at all, when in fact you may have cancer?


I reference the following link for more info on SMART:

http://en.wikipedia.org/wiki/S.M.A.R.T.


In particular, the following quote is interesting:


"Conversely, little correlation was found for increased temperature and no correlation for usage level. However, the research showed that a large proportion (56%) of the failed drives failed without recording any count in the "four strong S.M.A.R.T. warnings" identified as scan errors, reallocation count, offline reallocation and probational count. Further, 36% of drives failed without recording any S.M.A.R.T. error at all, except the temperature, meaning that S.M.A.R.T. data alone was of limited usefulness in anticipating failures"


Just exactly how good is a technology that's vendor dependent and may or may not indicate if a real problem exists? I've seen people toss perfectly good drives because SMART technology was reporting trivial errors that they didn't understand, and other drives just drop completely dead with no SMART indicators showing anything. I've also seen some drives last for years after SMART tests predicted an "about to fail any minute" status.


Apple doesn't seem to give SMART reporting much importance, and I suspect it's for good reason.


I would take SMART technology as something to be aware of but not necessarily base my life on. It's not abnormal for a drive to drop a block a few times during its life, and it's actually normal for SSDs to do so.

Need advice on hard drive/optical drive testing software

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