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Question

bad sector identification

Sep 17, 2017 8:31AM PDT

I was searching for bad sector in hard drive. so, i ran a software , Hd_speed, on hard drive it gave a log file. that log file gives speed in kb/s of sectors. i see 0kb/s in some sectors. Also few hundreds kb/s and mostly in thousands kb/s. Low speed means bad sector but i want to know, below what speed should i consider the sector as bad sector?

Discussion is locked

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Answer
I'm going with yes.
Sep 18, 2017 5:28PM PDT

This is not a dissertation. The old SPINRITE used transfer speed among other tests to call a track or sector bad. But here's the thing. Drives since about 2000 implement spare tracks and sectors and when you see bad sectors reported the drive is now in failure mode. No one I know will keep such a drive. It's gone.

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Still want to use that drive
Sep 20, 2017 1:07AM PDT

I want to use this hard drive and i don't care of loss of data. so thats why i want to isolate bad sectors manually as described video tutorial (https://youtu.be/7UsuH73DG2w).

That's why, I am asking below what speed in kb/s should i consider the sector as bad?

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You can ask
Sep 20, 2017 10:12AM PDT

But only you can determine the threshold. If this was me, you already have my first answer. So my second answer is that any speed below say 25% of average is bad. This is just a pluck a number from the sky answer. Only you can set this value.

-> Old tech trick time. We used to find drives with damage only to the first few tracks. So to eek out some use we would use a tool like GPARTED to move the start of the partition up 10 to 100 tracks. This is not an offer to expand on this or write dissertations. You must be conversant on the topics in this thread. It is an advanced area with no one to hold hands with. Yes that can upset folk but if they are upset, they are too far out of their skill and comfort zones.

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Answer
Forget that
Sep 18, 2017 6:37PM PDT

If this is a windows machine use chkdsk with the F and R option.
If the drive reports bad sectors bin the disk and get a new one.

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Don't want chkdsk
Sep 20, 2017 1:00AM PDT

Instead of chkdsk i want to isolate bad sector into partition manually as described in video tutorial https://youtu.be/7UsuH73DG2w . That's why i am asking about speed below which i should consider that sector as bad

Post was last edited on September 20, 2017 1:03 AM PDT

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Re: speed
Sep 20, 2017 1:06AM PDT

Consider anything extraordinary low as suspect. Then check it by writing and reading to it. If that still works, it's OK for the moment. If that gives an error, it's bad.

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Bad sectors
Sep 20, 2017 2:35AM PDT

Seems like a hard way to do things.
Allow the disk firmware to spare out sectors.
If chkdsk or smart is reporting bad sectors bin the disk and get a new one.
I have not done manual flagging/sparing in well over 20 years.
Disk today are cheap they are not worth playing with.

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Answer
bad sector identification
Oct 27, 2017 11:30PM PDT

An awful area is a part on a PC's plate drive or blaze memory that is either out of reach or unwriteable because of changeless harm, for example, physical harm to the circle surface or fizzled streak memory transistors. Awful divisions are typically identified by a circle utility programming, for example, CHKDSK or SCANDISK on Microsoft frameworks, or badblocks on Unix-like frameworks. Whenever found, these projects may stamp the parts unusable (most document frameworks contain arrangements for terrible segment marks) and the working framework skips them later on.