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You are here: MacNN Forums > Software - Troubleshooting and Discussion > Mac OS X > Trying to copy Apple Hardware Test to external drive, need help

Trying to copy Apple Hardware Test to external drive, need help
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Jan 11, 2010, 12:37 AM
 
Did a search & couldn't find the answers that I'm looking for. Forgive me for the long post, there's some backstory to this problem

My MacBook Pro has been acting a little bit weird lately (nothing bad enough to bring to the Apple Store yet) so, I've been getting ready to create an emergency boot disk with 2 partitions:

*Snow Leopard with various Disk repair software (Disk Utility, TechTool Pro, Disk Warrior, Drive Genius, Data Rescue & Stellar Phoenix, all of which I legally own copies of)
*Apple Hardware Test (in case I lose my disc or it gets damaged)

The first one should work just fine. I'm having problems with copying Apple Hardware Test to an external drive.

I'm got a 15-inch MacBook Pro (Core 2 Duo) & my Mac OS X Install Disc 1 is:
Mac OS X 10.4.8
AHT Version 3A116
Disc Version 1.1
2Z691-5948-A

Apparently Apple Hardware Test is on a hidden partition (about 30MB or so) that does not normally mount (except when running AHT). I tried finding the partition using the Terminal command "diskutil list" & it didn't show it. I then tried showing the hidden files & the only thing that I could find were the diagnostics folder, located at: "Mac OS X Install Disc 1/System/Library/CoreServices/.diagnostics"

A friend mentioned to me that when trying to create a Disk Image of the Mac OS X Install Disc 1 with Disk Utility, I needed to select the parent DVD drive (and not the item listed below as "Mac OS X Install Disc 1), go to File-->New-->Disk Image from Disk 1 & then a complete copy (plus the hidden AHT partition) would be made.

I've got a 16GB Flash Drive & I tried copying the Disk Image using Carbon Copy Cloner (and later trying the "Restore" option with Disk Utility itself, Kept getting the same error over & over: "An error (16) occurred while copying. (Resource busy).") & it would only boot into the Mac OS X Installer, even after holding down the D key while booting up.

I thought maybe it didn't like USB so, I tried the same with an external FireWire Drive. Same results. Then a friend mentioned that he found out that Apple hosts (pretty much all) AHT Disk Images on their site:

http://download.info.apple.com/Apple_Hardware_Test/ + Disk Image file name

and he also sent along this information too:
Apple Hardware Test 3A115
Apple Hardware Test v 3A115 supports MacBook Pro (15-inch Core 2 Duo) only. 2006-10-24 Diagnostics MacBook Pro
018-2591-A
4.5 MB

Apple Hardware Test 3A116
Apple Hardware Test v 3A116 supports MacBook Pro (17-inch Core 2 Duo) only. 2006-10-24 Diagnostics MacBook Pro
018-2592-A
4.5 MB

So 018-2591-A would turn into "018-2591-A.dmg". Regardless if some of the version information is wrong (I've got a 15-Inch Core 2 Duo & the AHT Version is 3A116), I downloaded both & cloned them to my 2 drives (the USB & the FireWire drives, using Disk Utility & Carbon Copy Cloner) & tried booting from them. Wouldn't boot. All that were on the Disk Images were "/System/Library/CoreServices/.diagnostics". Nothing more. Carbon Copy Cloner gave me this error when cloning them:

Originally Posted by Carbon Copy Cloner
The target volume will not be bootable because a required system file (Library) does not exist at the root of the source volume.
So, here are my 2 questions: has anyone been able to successfully locate, & copy, the hidden Apple Hardware Test partition & clone it to an external drive & run AHT from there?

edit: Just tried restoring the Mac OS X Install DVD 1.dmg file, to my external Firewire HD, on a different computer & Disk Utility gave me this error now:

Restore Failure
Could not find any scan information. The source image needs to be imagescanned before it can be restored.

If I try mounting the dmg first, I get this error instead:

Restore Failure
Could not validate source - Resource temporarily unavailable

The dmg was a complete copy of the original disc
( Last edited by celebi23; Jan 11, 2010 at 01:26 AM. )
     
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Jan 11, 2010, 02:27 AM
 
I have successfully done this with my MBP's install DVD and AHT.

All I had to do was to use Disk Utility > Restore. Drag the install DVD to the source field, drag the emergency partition to destination. Do not forget to select 'erase destination'! Then restore.

If I boot holding d and the emergency partition is connected, AHT will load as you expect.
     
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Jan 11, 2010, 07:00 AM
 
Originally Posted by Simon View Post
I have successfully done this with my MBP's install DVD and AHT.

All I had to do was to use Disk Utility > Restore. Drag the install DVD to the source field, drag the emergency partition to destination. Do not forget to select 'erase destination'! Then restore.

If I boot holding d and the emergency partition is connected, AHT will load as you expect.
Awesome! I'm not sure why I didn't try this to begin with I missed the obvious thing to try
     
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Feb 21, 2010, 06:09 AM
 
Nice catch on the AHT images being posted online, btw. It seems like dmgs are available up through the end of 2008, but unfortunately it seems like they stopped posting them for 2009 models or changed the file format.

http://download.info.apple.com/Apple...018-3254-A.dmg seems the most comprehensive, supporting most of the year 2008 models.

3282 Mac-F4208AC8, Mac-F42289C8 Xserve1,1 and Xserve2,1
3259 Mac-F42C8CC8 MacBookAir1,1
3273 Mac-F42C88C8 MacPro3,1
3254 bundled F4238CC8,F42386C8,F4218EC8,F4208EAA,F4208DC8,F4208 DA9,F4238BC8,F42388C8,F22788C8 (see below)
3169 same as 3254 bundle
3085 Mac-F22788C8 MacBook3,1
2886 Mac-F4208EAA Macmini2,1
2845 Mac-F42386C8 iMac7,1
2833 Mac-F42388C8 MacBookPro3,1
2770 Mac-F4238BC8 MacBookPro3,1
2769 Mac-F4208DC8 MacPro1,1
2667 Mac-F4208DA9 MacPro2,1
2766 Mac-F4208CAA MacBook2,1
2592 Mac-F42189C8 MacBookPro2,1
2591 Mac-F42187C8 MacBookPro2,2
2590 Mac-F4208CA9 MacBook2,1
2579 Mac-F4218FC8 iMac6,1
2535 Mac-F4218EC8 iMac5,2
2534 Mac-F4228EC8 iMac5,1
2533 Mac-F42786A9 iMac5,1

Present but too old to easily to identify:
2418 2405 2398 2393 2392 2342 2216 2215 2158 2120 2079 2056 1880 1879 1680 1594

Incidentally, the diagnostics just live in
/System/Library/CoreServices/.diagnostics
so I don't think a separate partition is necessary. Just putting them there should be enough to allow you to boot to them by holding D (though I haven't verified whether this also works on an external drive).
( Last edited by mkincaid; Feb 21, 2010 at 06:13 AM. Reason: added info)
     
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Feb 21, 2010, 12:24 PM
 
Great info, mkincaid. . .

"The natural progress of things is for liberty to yield and government to gain ground." TJ
     
   
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