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The approach which I have tried in Windows that works is by opening the device directly as a file (using the PhysicalDrive# handle) and start issuing read / write commands, which returns failure for...

I guess, we are debating on what I wrote on this thread rather. I had mentioned that I wanted to zero fill a drive in my first post.

Let's not go over into frenzy again! :)

I am able to do it...

My requirement is simple.

I want to zero fill a drive before I do "something" to it.

I want to know how many bad sectors on it as my decision of doing "something" is dependent on it.
...

Updates!! :(

Unfortunately, even the SG_IO method of sending write command (technically they are SAT commands, though the core is ATA commands) could not be failed for a bad sector.

I have...

I guess I'm gonna try that. Will update soon. thanks

---------- Post updated 02-24-10 at 11:30 AM ---------- Previous update was 02-23-10 at 08:15 PM ----------

Based on Corona688 suggestion, I...

Thanks for the link. Will look into the sleuth kit's sources.

I don't want to do an ATA transfer, but would like transfer the data at a higher level. :)

I feel that the implementation is manufacturer and model specific in most of the cases I've seen so far. Also, the revision of ATA specs the drive implements. Older the drive, the longer it takes on...

thanks. Will try the linux kernel mailing lists.

Regarding the device interfacing, my requirement deals with a set of data transfers, either be in DMA or PIO mode (for older hdds), in the current...

Wow! It's all I can say!

That was a fantastic reply straight to temple! :)

Yup! I read about the Libata stuff implementation and got to know that I cannot implement it in a program as you have...

yep. you are right. For (IDE) PATA / SATA (t13.org) disks there are the ATA / ATAPI standards which specifies how to query the device directly and SCSI has a loads of standards (t10.org) for...

okey. will try posix_fadvise() now.

Yes. I have tried the read call. It does not return a failure for the read operation on bad sectors.

It returns success. It says it had read the amount of data I request for.

The only way I...

thank you.

So, there is no way around it without writing a device driver to handle the read/write operations? Is that right?

I have a utility written in python which able to identify the bad...

read passes too. It does not return error until the device itself fails.

I just want to catch / count the read / write I/O errors from the program.

With the read atleast i can identify by...

Here is the code which I am using.

int writesector(const uint64_t offset, const int fd, const uint8_t *mybuff, const uint16_t len)
{
if(!fd)
{
return 4;
}
errno = 0;
...

I wanted the write to fail only for the bad sectors, but it was failing for all the sectors in the O_DIRECT mode, but I got a working program. (Well, working means, I was able to write to the...

thanks for the reply.

I know O_DIRECT might work, and I tried with O_DIRECT, but it fails for some reason. I have tried with aligned the write buffer after getting the block size from the HDD. But...

Hi,

I am trying to write zeroes to the hdd using a c program. I don't want to use the dd or ddrescue or any such inbuilt program because of reasons like real time progress, writing custom...