1731 S Brand Blvd. Glendale, CA 91204

What causes Bad Sectors on Hard Drives?

Within each hard drive, there are platters with tiny clusters of storage space known as sectors. Sectors become defective when they do not respond when reading or writing requests. There are two different types of bad sectors. The first type of a bad sector is called a (logical) soft bad sector which means that the sector can no longer read the data and the operating system is giving you an error correcting code (ECC). Soft bad sectors are caused by software issues. This is repairable and can be done by using a few different methods. Secondly, the other type is called a (physical) hard bad sector which is when you have physical damage to the hard drive. Scratches on the platter can lead to more hard bad sectors.

What causes Bad Sectors on Hard Drives?

Physical damage is the traditional cause for bad sectors. Common issues occur from manufacturing errors, normal wear and tear, dropped drive, dust in the hard drive, etc. Bad sectors can also lead to data loss which will inquire a certified data recovery technician to assist in recovering your data. Luckily, at Five Star Data Recovery, our specialized specialists in data recovery use top of the line equipment to recover data from bad sectors by slowing down the rotation of the platters to recover any data.


Working with Five Star Data Recovery was a great experience. It’s never a fun day when you find that your data is in trouble…but the team at Five Star was very quick to answer questions on a weekend after hrs and then promptly got to work as soon as we dropped off our corrupt CFast card. The whole process was very clear, they communicated often and in detail and in the end were 100% successful in recovering everything we needed. Our footage was saved and it was top notch service along the way. The final invoice was exactly what he quoted at the beginning with no surprise costs. I 100% recommend Vahan and his team.
Justin C.
I am so thankful that they have 24/7 support on the phone. I just recently called after my hard drive fell onto carpet. They had all the answers and knew exactly what they were talking about. I would recommend them for hard drive support!
Taylor L.
Can’t say enough good things about Five Star Data Recovery. Took my drive in and had the data back within 24 hours. I was even able to recover the “damaged” files, so pretty much a total recovery of 20 years worth of data. Yeah, yeah, I should have backed up my drive, but I’m just glad that Vahan and the Five Star team were able to get me back in business!
Kip K.
This place is great, i’ve been going here for three years Vahan, recovered my data from my hard drive , then he upgraded my Laptop MacBook Pro ( Two HD’s installed and upgraded ram), and today they repaired my MacBook it was running slow they switched out the data cable. Very Honest and Have great service. They’re better than the Mac Genius Bar . Affordable and they repair on time. 
Matteo O.

Let’s me start out by saying “The Best Data Recovery shop Anyone can ask for “! The word around town is true! I was referred by a friend. I had an issue with my drives freezing up and crashing which resulted in losing my data. I took it to A few places and they weren’t able to fix the problem. Just to break down i brought in my MacBook Pro on Monday and went over the issues with Vahan. He took his time explaining the possibilities and options. Mind you their teams customer service is A1! The next day I got a call that all my data has been restored. I was in total shock their speedy turn around was amazing! I rushed down to the shop to pick up my MacBook which then I purchased an additional MacBook since their prices were amazing and Vahan totally hooked it up. Guys look no where this is the place to go if you need any data recovery or even Macs!!!

Steve T.

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