However, some drives will not immediately remap such sectors when written instead the drive will first attempt to write to the problem sector and if the write operation is successful then the sector will be marked good (in this case, the "Reallocation Event Count" (0xC4) will not be increased). Read errors on a sector will not remap the sector immediately (since the correct value cannot be read and so the value to remap is not known, and also it might become readable later) instead, the drive firmware remembers that the sector needs to be remapped, and will remap it the next time it's written. If an unstable sector is subsequently read successfully, the sector is remapped and this value is decreased. Count of "unstable" sectors (waiting to be remapped, because of unrecoverable read errors). ID Cur Wor Thr RawValues(6) Attribute NameīB _98 _00000002 Reported Uncorrectable Errorsį0 100 253 _0 3E05000027C0 Head Flying HoursĬurrent Pending Sector Count. Contrôleur des espaces de stockage Microsoft 2 may mean 11-100 bad sectors.I recently had a alert in Crystal disk with one of my HDDĬan someone can check if i need to back up my files please?ĬrystalDiskInfo 6.7.3 (C) 2008-2016 hiyohiyo Often it's a logarithmic count, so 1 may mean 1-10 pending sectors. (The exact meaning of the numbers varies with each manufacturer and sometimes with different drives. Check it again in a few days to see if it's gotten better or worse. That's a sign of imminent drive failure.Īssume the worst and backup your data just in case. The thing you want to watch out for are bad sectors which appear and increase in number suddenly. Or the pending sector could be cleared up and everything goes back to normal. So this could be a sign the drive is going bad. Several thousand reserve sectors are included on every HDD to substitute for sectors which go bad with age. Bad sectors are normal and expected behavior, especially in an old drive, so manufacturers took steps to counter the issue. It has been mapped out so it's not used again, and a reserve sector substituted. An uncorrectable sector is one which has been tested and can no longer reliably hold data. The drive needs to test it once the data on it is moved. A pending sector is one which is marked as possibly bad. Bad sectors are normal as a drive gets older.
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