kernel [0]: disk0s2: i/o error and AHT freeze on 27 "iMac

Hi all

According to the title, I have serious problems with my iMac 27 "with El Capitan.

It started all of a sudden with wheel rotation in a way that I am still unable to reproduce.

I have not installed anything again for weeks. Enough I traveled a lot for business, so my iMac has been mostly off.

The logs show a recurring kernel [0]: disk0s2: i/o error.

Initially, I tried a repair disk that consistently failed, so I tried AHT, once to short and long.

They both finished in a gel semi then very close to completion.

I'm talking about gel semi as mouse reacted but with seconds behind and jerks and stop button has not actually no result so he needed a hard stop.

I also tried to leave the long test running overnight to prevent my impatience for her give up too soon.

The next day, I found it hung there, very close to realization.

Not sure if it's relevant information, but the only way to get my iMac on the way of the AHT was pressing command + D and the iMac sarched necessary information on the net.

THE D only has not given any results.

I decided to enter recovery mode, format and reinstall El Capitan.

Everything went well and that the system worked very well.
I opened Safari and scoured Internet. Everything seemed very well answered.

Then I turned off the system as another business trip is expected.

3 days later, I rebooted my machine and still ONCE, spinning drying up and disk0s2: error e/s in the newspapers.

Repair disk fills very well this time (Foundation nothing to fix) but same thing AHT: semi freezes almost to the end.

As a bonus, I now get a system that is very slow to restart: it takes 10 minutes to show me the office and there is in fact the largest part of 10 minutes for the gray Apple with a progress bar that seems to never end.

Then at some point it ends and I can connect, but connection takes at least 2 minutes.

Saw that AHT is a RAM test and a test of logic board before freezing, but I don't know when exactly it freezes because it does not end and I have no error reported trials.

Now, the question is: are these symptoms more of a HARD drive or a logic board failure?


I apologize in advance for my mistakes and spelling errors, it should be obvious English is not my main language.

Thank you very much.

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Probably a fault bad cable/connection between the logic and HARD drive, hard drive external pension, pension bad logic in that order.

Make an appointment with a genius at your nearest Apple Store. Diagnosis is free and they'll give you a quote for repair.

If you are on a budget to replace a HARD drive in an iMac is pretty simple DIY job provided you watch YouTube videos and get the right tools.

C.

Tags: Mac

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