MacBook Air 11" SSD Won't Mount

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2013年中 MacBook Air 11"

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Ian Fieldhouse @ianfieldhouse

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发帖于: 2018年9月25日

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MacBook Air 11" SSD Won't Mount

I’ve a problem with my son’s MacBook Air 11” in that the SSD won’t mount, i.e. on boot I’m getting the flashing folder icon.

Resetting the PRAM and SCM has no effect.
If I boot with Internet Recovery the SSD doesn’t appear in Disk Utility
Booting into diagnostic mode informs me that “There may be an issue with a storage device. “ and the code VDH004.
I opened up the case and checked that the SSD is seated correctly. It is.
I finally removed the SSD and put the module in his brother’s identical MacBook Air and this booted from the module without issue.

Any ideas as to what the issue is?

The above makes be suspect that there is a hard disk controller or logic board issue, but I’m open to suggestions.

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Dan @danj

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发帖于: 2018年9月25日

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Does the system boot up from an external drive? If it does then your issue is something related to the SSD connector and its logic. As you have a second system you could try connecting the two together and leverage Target Disk Mode to see if you can even access the drive from the second Mac Understanding the Applications for Target Disk Mode, most likely that won’t work either.

You may need to replace the connector or replace the logic board if that is easier for you.

Reference: Mac startup key combinations

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It boot up fine from an external drive. I can access the drive by physically removing it from the MacBook Air and swapping it with the SSD module in another MacBook Air so the drive itself is fine.

As you suggest it seems likely to me it's a drive connector or logic board issue, though I wouldn't expect to be able to run Internet Recovery or boot from and external drive if the logic board was broken.

由 Ian Fieldhouse 完成的 2018年9月26日

Did you try Target Disk Mode, to see if that made a difference? I wanted to try one other way to make sure what was failing here.

由 Dan 完成的 2018年9月26日

Yeah, I can't see the drive from the other Mac.

由 Ian Fieldhouse 完成的 2018年9月26日

OK, now lets do the reverse! Using your working system as the boot drive, here we will setup the good system in Target Disk Mode and have it running first. Then, Boot up your broken system and holding the Option Key to get to the boot drive manager you should see your other Mac's drive. Your system should boot up at this point once you select it. If that works then it's the drive connector as you've proved the PCH is working.

由 Dan 完成的 2018年9月26日

Yeah, looks like it is the connector. I can boot from the other Mac's drive in target disk mode. Thanks.

由 Ian Fieldhouse 完成的 2018年9月27日

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It boot up fine from an external drive. I can access the drive by physically removing it from the MacBook Air and swapping it with the SSD module in another MacBook Air so the drive itself is fine.

As you suggest it seems likely to me it's a drive connector or logic board issue, though I wouldn't expect to be able to run Internet Recovery or boot from and external drive if the logic board was broken. — Ian Fieldhouse
Did you try Target Disk Mode, to see if that made a difference? I wanted to try one other way to make sure what was failing here. — Dan
OK, now lets do the reverse! Using your working system as the boot drive, here we will setup the good system in Target Disk Mode and have it running first. Then, Boot up your broken system and holding the Option Key to get to the boot drive manager you should see your other Mac's drive. Your system should boot up at this point once you select it. If that works then it's the drive connector as you've proved the PCH is working. — Dan
Yeah, looks like it is the connector. I can boot from the other Mac's drive in target disk mode. Thanks. — Ian Fieldhouse

Rick G @rgman 声誉积分: 211 3 · Answer 1 · 2018-09-26T04:18:43-07:00

Rick G @rgman

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Sounds like the SSD is broken. if it doesn’t recognize it all in any machine, replacing the SSD is the solution.

Since these flash modules are pretty expensive, i’d recommend buying a second hand one. make sure you buy the correct one, since there are a lot of different models and they do not all fit.

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I mentioned in the question that the SSD module works fine in another laptop.

由 Ian Fieldhouse 完成的 2018年9月26日

Sorry, didn't see that. seems that the connector on the logic board is having issues.

have you tried reformatting the disk in the other laptop and putting it back?

由 Rick G 完成的 2018年9月26日

No, but I tried the known working drive module for the other laptop and that didn't work either.

由 Ian Fieldhouse 完成的 2018年9月27日

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