[hga]

Well, nowadays I buy them because that's the only way you get a 5 year warranty; I only build systems with 5 year design lifetimes (even for the parents; saves a lot of hassle).

Although I have seen some evidence of consumer grade drives "failing dirty". E.g. in 2002 I tried a couple of 5 year warranty Seagate Barracudas in a new machine; it didn't take long for one of them to outright fail a 4K portion of the disk. I actually wrote a little C program to recover everything but that one bit (and it was a file I could then recover the missing data from), and switched back to SCSI enterprise drives for my main system drives and haven't looked back (granted, those are as fast as I can buy, and that means SCSI enterprise). And that includes a couple of machines I built for a non-profit that are exactly what datphp describes.

And, yeah, these best of the best drives do fail, at least I had at least one of the Seagate Cheeta 10K drives I bought back in 2002 completely fail, I think both eventually, the 2nd after 5 years had passed.

[lsc]

>I actually wrote a little C program to recover everything but that one bit (and it was a file I could then recover the missing data from),

'ddrescue' is a program I use in similar situations. (not to discourage you from writing your own; doing that sort of thing leads to a deeper understanding of what is going on.)

[hga]

I was still stuck in Windows (Windows 2000), and it was quite a bit faster to write the program than find a solution on the net like that on a live CD, download it, etc. Having started on C in 1979 (sic) I knew it cold by then.

But, yeah, confirming exactly what was the problem was good, especially since it was extremely odd. All blocks readable except for those 8, although the drive knew it was in trouble.

It reminds me of problems others have reported, especially those using high level error checking file systems like ZFS, where the drive accidentally writes to the wrong location correct data correctly, so the internal CRC passes on reads. The firmware in drives is said to be getting to full OS complexity....