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Mid 2012 model, A1278 / 2.5 GHz i5 or 2.9 GHz i7 processor.

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SSD Became Very Slow

Hi

Recently I could not boot my macbook as the blinking question mark folder appeared. After some troubleshooting and tinkering, I found that there was an issue with my HDD cable.

So, I got my hdd cable replaced and now the system is able to boot with the ssd. However, now the ssd has become very2 slow. Every few minutes, the colourful beachball mouse pointer comes up and the application state becomes "Application is not responding". After some 1 minute or so, it continues fine and than after few more minutes, the same state happens again. I replaced my ssd with the normal disk and the that disk works fine. I do not think its the hdd cable issue as the system is able to detect the ssd.

Please advice..my system details is as follows:

MacBook Pro (13-inch, Mid 2012)

Processor 2.9 GHz Intel Core i7

Memory 16 GB 1600 MHz DDR3

OS Yosemite 10.10

Thanks

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I would start by checking the systems firmware. Follow this Apple T/N: About EFI and SMC firmware updates for Intel-based Mac computers. If it's newer that whats listed here you're OK. Makes sure the SSD's firmware is also upto date. Did you enable TRIM services?

The next thing here is reformatting the disk as you replaced the SATA cable you should have done this. That way any errors on the drive doesn't mess you up. In addition, it would also verify the cable was good which still could be an issue. I add some tape around the folds to give the cable some additional protection. Also make sure the rubber grommets are present on all four mount points.

The last thing here is making sure the drive has free space. You should have 1/4 to 1/3 of the drive free (smaller drives need more space). Also clean out the old cache & logo files. Here's a good tool on the App Store to make this easy: Disk Doctor.

Let us know what you find.

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