What causes this case? anyone give me explain about my pic?

Looks like a failing head or the drive has a scratch or other media failure. Entropy is a most frequent culprit . . .

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The drive is an Advanced Format model:
http://storage.toshiba.com/storagesolut ... sxp-series

A Reallocated Sector Count of 16376 looks much too big to be real, but if you interpret it as a Reallocated LBA Count, then the actual number of reallocated physical sectors is 2047 (= 16376 / . In hexadecimal that equates to 0x7FF. To me it looks like the drive may have maxed out.

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A backup a day keeps DR away.

but a LBA=a sector

An LBA is a logical sector. For compatibility reasons, an Advanced Format drive still emulates 512-byte sectors. It's called 512e.

http://en.wikipedia.org/wiki/Advanced_F ... ormat_512e

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A backup a day keeps DR away.

this HD can still be used to read data takes a long time, i've formated with LLF but no change

That is a big warning sign to you.


Yes, of course, that is a normal result for the likely types of problem which jono-ats kindly explained to you. Since you don't need the data from this drive, then there is no point in any further DIY attempt, so just replace the drive.

I can think of one other, less likely, possible cause for the very limited info you have given - but the easiest test for that hypothesis is just to replace the drive, and make sure that similar symptoms don't occur again with another drive.