First the problem:
Transferring terrabytes at a time of videos that are 50m-4g for transfer to a different drive, and for working on my professional video work.
I binary CRC the transferred files , a rare file will have failed to transfer properly to the other hard drive.
Average bit inacurate files <0.3% relative to data quantity (the bigger a file the more likly some bits will be wrong)
If I was to put a number on, for each terrabyte of disk to disk movement, there are 10-15 tiny changes to the data.
Compares of the files show that there will be a few items within the file that changed, but basically speaking the files are still 100% usable. If it was not for the CRC check I never would have known.
Compares can be repeated on only the (few) failed files, which demonstrates if a read error occured or if it was written to the drive that way.
I have traced the situation down via the process of elimination to "things going through the Intel controller" Most. (another controller doesnt have that issue, and I proved the hard drives are bit accurate in other ways).
I have tried to make the post short , because i have experimented for days and days , and it would read more like a book, but if you need to know more i will certannly write the book
Question:
I want to know what is the likly cause of a few tiny bits not making it from one hard drive to the other VIA the Intel ICH8. More bits fail the faster and harder i push it.
Machine Specs:
Board: P5B-Deluxe (no wifi)
Chipsets Intel 965 ICH8 SATA controller
CPU: 9550 Duo Quad OC to 3650
Ram: Normal OCZ 800type runnning ~830 SPD timing
FSB: 1720 Multi 8.5 Voltage of CPU ~1.2v
Passes Prime95 ram based and cpu based torture tests
OS: XP pro SP1.5
Whats hot and what not:
High temps during these tasks only on 965 chip (and cpu when pushed which it isnt)
ICH8 chip has tall heat sync on extra does not seem to be overly hot
Ram Chips get hot, but not unusually so
Case Air flow (at the moment) is lower, I have the case open now
Voltages are all stable.
Drive Configuration:
Drives are configured for Raid0 (at this moment) but the configuration did not seem to be the actual issue, because i can still get the bit fails (less) when blazing enough data from singles.
Drives are HD greenies , but i have not had "RAID" issues with spindown and error fix stuff , S.M.A.R.T. shows there (basically) have never been any bad sectors on the things, so that aspect of raiding greens has not come up yet.
Billions of bits of data are used on this computer daily, and you would never know that anything was going wrong ever, without the CRC check, the system has been on green raid for years.
The situation is worstest when going from RAID0 X2 to RAID0 X2 drives moving data at 89-130MBS. Having 2X X2 Raid0 is new for this computer, so HD data rate is much higher along with more CRC fails.
ICH8 Chip does not seem Overly hot, although it gets hot when lots of stuff going through it.
In the BIOS the ICH8 chip voltage can be reduced or raised, i was previously running it reduced for cool/quiet, but i put the voltage back to "normal" and i am pretty sure it still has the problem.
being terrabytes of data that are working 100% and even CRC checking 99.9% correct, and being massive file sizes the TIME it takes to test the issue is still days and days.
Transferring terrabytes at a time of videos that are 50m-4g for transfer to a different drive, and for working on my professional video work.
I binary CRC the transferred files , a rare file will have failed to transfer properly to the other hard drive.
Average bit inacurate files <0.3% relative to data quantity (the bigger a file the more likly some bits will be wrong)
If I was to put a number on, for each terrabyte of disk to disk movement, there are 10-15 tiny changes to the data.
Compares of the files show that there will be a few items within the file that changed, but basically speaking the files are still 100% usable. If it was not for the CRC check I never would have known.
Compares can be repeated on only the (few) failed files, which demonstrates if a read error occured or if it was written to the drive that way.
I have traced the situation down via the process of elimination to "things going through the Intel controller" Most. (another controller doesnt have that issue, and I proved the hard drives are bit accurate in other ways).
I have tried to make the post short , because i have experimented for days and days , and it would read more like a book, but if you need to know more i will certannly write the book
Question:
I want to know what is the likly cause of a few tiny bits not making it from one hard drive to the other VIA the Intel ICH8. More bits fail the faster and harder i push it.
Machine Specs:
Board: P5B-Deluxe (no wifi)
Chipsets Intel 965 ICH8 SATA controller
CPU: 9550 Duo Quad OC to 3650
Ram: Normal OCZ 800type runnning ~830 SPD timing
FSB: 1720 Multi 8.5 Voltage of CPU ~1.2v
Passes Prime95 ram based and cpu based torture tests
OS: XP pro SP1.5
Whats hot and what not:
High temps during these tasks only on 965 chip (and cpu when pushed which it isnt)
ICH8 chip has tall heat sync on extra does not seem to be overly hot
Ram Chips get hot, but not unusually so
Case Air flow (at the moment) is lower, I have the case open now
Voltages are all stable.
Drive Configuration:
Drives are configured for Raid0 (at this moment) but the configuration did not seem to be the actual issue, because i can still get the bit fails (less) when blazing enough data from singles.
Drives are HD greenies , but i have not had "RAID" issues with spindown and error fix stuff , S.M.A.R.T. shows there (basically) have never been any bad sectors on the things, so that aspect of raiding greens has not come up yet.
Billions of bits of data are used on this computer daily, and you would never know that anything was going wrong ever, without the CRC check, the system has been on green raid for years.
The situation is worstest when going from RAID0 X2 to RAID0 X2 drives moving data at 89-130MBS. Having 2X X2 Raid0 is new for this computer, so HD data rate is much higher along with more CRC fails.
ICH8 Chip does not seem Overly hot, although it gets hot when lots of stuff going through it.
In the BIOS the ICH8 chip voltage can be reduced or raised, i was previously running it reduced for cool/quiet, but i put the voltage back to "normal" and i am pretty sure it still has the problem.
being terrabytes of data that are working 100% and even CRC checking 99.9% correct, and being massive file sizes the TIME it takes to test the issue is still days and days.
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