Fix bad sectors mac hard drive

I do not know whether a standard non-secure erase with Disk Utility If you did this it would be a very time consuming task. Of course, you'd have to add in the time to hopefully restore your system from your hopefully trustworthy backup.

What Is Bad Sector?

It is not clear to me that there is a need for you to attempt to actively force this to be "corrected". Supposedly the drive's firmware should handle this on it's own the next time there is an attempt to write to bad sector. Also, it seems likely to me that the offending sector is not currently being used as part of any file. TechTool just "stumbled across" it while scanning all sectors of your drive.

But if you wanted to attempt to force a correction then I guess you'd have to do something which would force a write to that sector. It doesn't seem worth the effort though. I would just continue to back up your files and keep an eye on your drive in case it starts to degrade further. If you're seeing bad blocks when you run a filesystem integrity check, the hard drive has most likely already exceeded the number of blocks it can remap, and has exhausted its "spare" sectors. You should backup your data immediately if you haven't already and replace the drive before the problem gets worse and you lose your data.

The easiest way to force the drive to do its own bad block remapping is to boot from an Ubuntu Live CD , then open a terminal and run this command:. This will do a non-destructive random read-write test on the first drive, remapping bad sectors along the way. Since you're using Mac OS X, which is based on BSD, you might also want to read up on badsect and bad , which are the built-in BSD command-line utilities for dealing with bad blocks.

My experience with SpinRite from grc. I've managed to recover at least 4 disks that have failed every other attempt to repair them. The good thing is that just about any other p. PC will run it, from floppy, CD, or flash drive. I've not found anything else that comes close in terms of actually inspecting the contents of individual sectors and recovering the data in what every other utility discards as a bad block.

It will attempt to map the blocks with errors to names, similar to the -B option. This identifies the bad blocks and marks them as such so the won't be used again. By writing 0's, you do just that. I can imagine this can be very time-consuming, especially if there are many errors and thus many files to replace. If that's the case, consider replacing the drive, it'll get worse It sounds like most drives will only reallocate a bad block on a write, so that's how all processes 'fix' bad blocks. If you're willing to reformat, lots of people talk about doing a low-level format that writes zeros Disk Utility will do this.

The only tool on the Mac that I found that will do this is "Speed Tools". When it finds a bad block it will write a zero to the block even if it's in a file In an edge case, a fix may make recovery of data impossible. Amongst the utilities that I have used on Macs, one is outstanding for unmistakable alerts such as this:. This will most likely result in volume or data corruption if a bad block is found and spared. For its unmistakable warnings, for pre-purchase satisfaction and more, this answer is my vote of confidence in:.


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I don't know of any modern utilities for Mac OS X that actually fix mark bad blocks and let you get on with your day. Such as Version 7. This just sounds hard to do, but it's not. Being a "REAL" Mac technician and fan boy for the last 20 some years, I have machines from the k up to a Dual G5, so the hardware is just lying around for me.

How to Repair Bad Sectors on Mac - Info | Remo Software

In other words, it's super easy for me. Why do I sound rude? Because I am. I'm very crossed with the current Apple, and I especially hate Steve Jobs for destroying Apple Computer for us 's and 90's Macintosh Users, and turning the Mac into nothing more than a PC that runs a bland version of Unix. He, and the people that think like him, are the reason that Mac's no longer have the utilities you need to repair your HD "properly".

SMART is extremely flawed. HD's have almost always remapped bad blocks automatically, at least since I can remember and I'm old for a technician. They do a crappy job at it and if you are seeing bad blocks, that's because the HD has run out of the tiny amount of space that is reserved for re-mapping bad blocks automatically. IE, you need to run a utility that does a better job at it.

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By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies. Home Questions Tags Users Unanswered. Fix bad blocks on Mac hard disk Ask Question. It seems to work fine. But I want to scan for bad sectors just to be safe.

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I use this drive for all of my TimeMachine backups. Is there a way to do this for my drive on Macintosh without purchasing third party tools? This article on osxdaily has a lot of good information that relates to this problem. The process that relates to this question:. A GUI window pops up that gives you a status as it runs multiple checks of your hard drive. In my case, the hard drive came up clean and the report then said nothing about sectors but did indicate my hard drive seemed in good working order.

It gave details about many checks run, just no text about the sectors. Someone else with a hard drive with bad sectors would need to try this to see what it does and what it says when a problem is found with a sector. Some cases will support it, some do only with vendor-supplied software. It's good at telling you the drive HAS a problem, not so good at telling you the drive might have a problem soon. And bad sectors on modern 21st century drives are already mapped out by the drives controller - any sector that doesn't read reliably will just be mapped to a spare sector and you won't know about it.

Was the Seagate running when it was dropped? If no, no problem. They're designed to take some minor abuse when turned off. If yes, and you do manage to detect even a single bad sector then just replace the drive. It also appears in Finder.

However, sometimes, the disk can fail to mount when you connect it. If none of these work, there might be something wrong with your hard drive. Try to backup your hard drive in question via Disk Utility or a third-party cloning utility so that later, you can erase and reformat the drive with a new file system. Age and continuous usage can slow a Mac down. Additionally, a lot of other factors can contribute to degrading Mac performance like hard drive becoming too full, macOS being outdated, crowded startup, too many apps running in the background, hardware issues, etc.

Taking out the time and patience to manually clean up Mac hard drive and perform other tune-up tasks can easily get frustrating. Thus, avoid all hassle and try Stellar SpeedUp Mac. This product automatically removes system junks, large unused files, duplicates, old apps, and unused login items from Mac hard drive with the click of a button. Mac hard drive S.

10 Worst Mac Hard Disk Drive Problem with Solutions

There still might be hope for your hard drive. In order to cover all recovery chances from your end, follow these steps:.


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  • If none of these steps works, you may need to repair or replace your hard drive with a new one. Related Topic: While trying to perform partition resizing or reformatting operations, many users report accidentally deleting their partitions having important data. Also, due to issues such as partition table damage, technical issues with the drive, bad sectors, or virus attack, one or more hard drive partitions can get accidentally deleted.

    Moreover, if volume s on your Mac fails to mount, then this software will help recover the volume data smoothly. Find Deleted Partitions on macOS. The platters are quite delicate and are easily damaged by the slightest jerk or drop. If you hear clicking noise emanating from your Mac hard drive when you try to boot up your Mac, that could mean your hard drive has suffered physical damage. DO NOT attempt to open it up and mess around since that could further the damage and lead to permanent loss of the data contained in it.


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    • When this happens, you may also be unable to erase or partition the drive. This mainly happens because the boot drive has been modified somehow or it is being used by some other process or application. This can be done in one of the following ways:. Doing so will recreate new HFS file structure on the hard drive, which will be free from cryptic errors. However, every encryption works in conjunction with a decryption key which is used to decrypt or unlock the data before it can be accessed.

      Mostly, this decryption key is a password chosen by you. In the event that you lose or forget your encryption password, you might lose access to your data permanently. First make really sure you are typing in the password correctly. Turn off the Caps Lock and choose the Show Password option just to be double sure. Data loss from any hard drive is inevitable. With powerful algorithms allowing the software to scan for recoverable data on your Mac hard drive, this software to recover deleted files from Mac is the best bet you have to recoup all your missing data.

      You might suspect that your Mac hard drive has started developing bad sectors if it throws any nasty errors saying so or if some information suddenly starts to go missing. Performing hard drive partitioning operations is fairly simple using Disk Utility.