![]() ![]() I've seen some drives with 1 or 2 sectors re-allocated, and then never again. ![]() Occasionally, sectors get weak and you'll have one re-allocated. However, if Windows sees bad sectors, then you could be losing data. Pending sector count is a count of sectors waiting to be remapped-IE, it will remap them time they are read or written (usually just when written, for some odd reason). This value being more than 1 or 2 is a big red flag to backup and replace (1 or 2 would be big red flags, if it were not 2+ years old). The highest I've ever seen on a non-OC'd system with what seemed like a healthy HDD was 3, I think, and that was enough to make me run the full self-diag on it and make sure data was backed up. I've probably encountered drives that bad, but I typically don't bother with SMART when the drive has obviously gone bad, based on other symptoms. Occasional blips happen, but 12? I've never seen that high, before. This should be very low.like 0-5 on a several-year-old otherwise-functional drive in a stock-speed system. Uncorrectable sector counts should be the count of sectors for which data recovery was not successful. High values indicate a hardware problem, usually the HDD itself (but sometimes PSU, or a bad overclock). Reallocated sector count should be the count of sectors moved to spare ones. Click to expand.Modern HDDs have reserved unused sectors on the platter, so that if a sector gets too weak, or otherwise gives errors, they can work to read the data, then move it, and then you don't lose your stuff. ![]()
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