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Gary's picture
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Joined: 2011 Jul 21
Bad Disk Block Utility?

I have an external disk drive (2.5" IDE PATA 120 GB drive in a Firewire case) that has developed some bad disk blocks.

I would like to continue using the disk but every time I create a file that spans the bad area on the drive, the process fails.

Please suggest a disk utility that will scan the drive for bad areas and remove those areas from the "available space" on the drive.

Thanks.

Gary

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sfp1954's picture
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Joined: 2013 Dec 29

You have one (or two) built in.
Open either Drive Setup (OS8, 9) or Disk Utility (OSX) and initialize the disk with the "zero drive" or "write zeros" to disk option. Any non-functional blocks will be added to the bad block table and not used.
In Drive Setup it's under "Initialization Options"
If you use Disk Utility (OSX) select "Erase", "Security Options" and "Zero Out Data".
Then install whatever version of TechTool is correct for your OS and scan for badblocks.

Gary's picture
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Joined: 2011 Jul 21

>Open either Drive Setup ...

I tried that. Unfortunately since the drive is a Firewire device, Drive Setup lists the disk as "Unsupported" and won't touch it.

I'll try Disk Utility next.

Gary

sfp1954's picture
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Joined: 2013 Dec 29

You may have to mount in internally in your computer (if that's possible) and boot from CD or DVD.