When the hard drive finds a read/write/verification error, it marks this sector as “reallocated” and transfers data to special reserved area (spare area). article.Ġ5 Reallocated Sectors CountCount of reallocated sectors. Note what it says in the table in the Wikipedia S.M.A.R.T. The drive’s firmware is supposed to do it automagically on its own. My understanding is that you would not do it. So, how do you change a “pending” bad sector to a “removed” or “reallocated” one? ?Ĭuriously, SMART Utility calls the drive “Failing” when all other utilities show it as “Verified”. On the other hand, SMARTReporter IS free. The keyboard shortcuts & mouse “right-click” context window won’t do it. attributes”.Īnother SMARTReporter quirk is that cut’n paste apparently only works in these display windows when you use the menu bar entries. test is failing?Yes, starting with version 2.4.5! Right-click the drive in the drive-list in the preferences window and select “Check S.M.A.R.T. In the SMARTReporter FAQ you can find this tidbit:Can SMARTReporter tell me exactly which S.M.A.R.T. registers, you just have to jump through unexpected hoops to do it. You can in fact query & display the contents of a drive’s S.M.A.R.T. SMARTReporter appears to be a rather “quirky” utility. Perhaps Disk Warrior’s “Bad Block” is referring to something else? (I couldn’t guess what that might be though). This is the number of bad sector’s which the drive has remapped.
registers for your drive with a tool like SMARTReporter, you should see an entry with ID number 05 and title “Reallocated Sectors Count”. I don’t know when it started but some time back the ability to remap a bad sector was merged into the firmware of the hard drive.
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I doubt you will find any software tools to “fix” bad blocks, at least for recent hardware.
What type of a Mac and what type of hard drive are you having problems with? If I know the address of the bad block, is there a low-level terminal utility for marking it?Īnswer: I don’t know of any tool that will do a surface scan and fix the bad blocks too. Today we have various tools for fixing up HFS+ directory errors (Disk Utility, fsck, DiskWarrior, TechTool), but I don’t know of any tool that will do a surface scan and fix the bad blocks too. It doesn’t fix anything.īack in the day, Norton Disk Doctor did the job of scanning and flagging (remapping) bad blocks on the Mac. As far as I can tell, TechTool only scans and reports a failure. I have a hard disk that I scanned with TechTool and it reports one bad block.
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