UezeU Posted May 20, 2006 Report Share Posted May 20, 2006 Running utorrent 1.5. I am in the middle of downloading a large torrent (7.58 GB) and am getting repeated crc errors. It is only one torrent that this occurs on. I have downloaded a grand total of about 20 GB of other torrents during this intermitant problem (slow torrent). I have done a little troubleshooting. I ran Prime95 on the heavy ram setting for about 6 hours, nothing. Did a low level scan on the harddrive (have yet to see one actually catch a crash before it happens though). Even with my reservations about HDD scanners I doubt it is the drive, around a year old. It is my torrent drive so it does get flogged, but still. Anyways it is this one torrent, is there any way to find if someone is sending bad md5s, I heard it has been cracked. Is it just a bad torrent, it would be surprisining since I am seeing 6 seeds and 84 peers. Any suggestions?? Link to comment Share on other sites More sharing options...
µtorrent-Guest Posted May 20, 2006 Report Share Posted May 20, 2006 crc is NOT bad hash.so this error is totally on your side (hdd/ram/cables what so ever) and has nothing to do with the µT or that specific torrent. Link to comment Share on other sites More sharing options...
UezeU Posted May 20, 2006 Author Report Share Posted May 20, 2006 any idea why this is happening with only one torrent. It happens about every 5-60 minutes, on only this torrent. I have had it stopped for a couple of days, no problems with anything else. Start up this specific torrent and CRC errors galore. I am thinking it has to be some reporting issue. If my ram or hdd were spewing crcs like that I would have to notice it in something else. Of course, that is my speculation. Any other ideas on how to test this beyond putting another client on the machine, like to save that as a last resort (long story). Btw, in the couple minutes that I wrote this post it gave me two crc errors. I just can't see this being a classic crc error. Any know exactly what utorrent reports as a crc. Also the crc error is a balloon coming out of utorrent, not a system level warning. Link to comment Share on other sites More sharing options...
Switeck Posted May 20, 2006 Report Share Posted May 20, 2006 It could be that torrent is 'posioned' by hostile uploaders that are intentionally sending out junk data. Link to comment Share on other sites More sharing options...
µtorrent-Guest Posted May 20, 2006 Report Share Posted May 20, 2006 if its an ballon, than its definitly an error with your hardware!Its in the FAQ (afai think to remember)Editstart: the linkhttp://www.utorrent.com/faq.php#I_get_Error_Data_Error_cyclic_redundancy_checkEditend:Hm. idea. It is a single file 7.5 GB thing and have you an FAT32 formatted HDD?! Link to comment Share on other sites More sharing options...
Ultima Posted May 20, 2006 Report Share Posted May 20, 2006 Can't be FAT32 if it got past the 4GB check. It's probably your hard drive. Maybe there are bad sectors where the files are located. Run some kind of disk checker. Link to comment Share on other sites More sharing options...
µtorrent-Guest Posted May 20, 2006 Report Share Posted May 20, 2006 ultima, you mean if its fat32 and such a big torretn µT will prevent you from messing with it in some kind. If so, than thats good to know and new for me. Link to comment Share on other sites More sharing options...
UezeU Posted May 20, 2006 Author Report Share Posted May 20, 2006 I am not running Fat32, good old ntfs. I just ran a second low level disk check, everything was fine. I can now see how this might happen. I might have a bad sector that has been already allocated for that specific torrent and when it tries to write to that sector the crc fails. That could explain the single torrent issue. Still, if it is so obvious to utorrent, how come disk scans show nothing? I guess I will try Bittornado. I'll post back when I get some results, anymore suggestions would be appreciated. Link to comment Share on other sites More sharing options...
UezeU Posted May 20, 2006 Author Report Share Posted May 20, 2006 Just tried out BitTornado and I recieved (Errno 13: I/O error Permission denied). It seems this error is most common when two applications are trying to access the same file. I am convinced at this point it is not a hardware problem. Anyone have an idea how I can weed out the offending file without deleteing all 3 gigs worth of DL? Link to comment Share on other sites More sharing options...
Ultima Posted May 20, 2006 Report Share Posted May 20, 2006 Hm, try using SpinRite.@µtorrent-Guest: I do believe that's how it works, or at least that's what I gather from what people have posted on the forums so far. Link to comment Share on other sites More sharing options...
µtorrent-Guest Posted May 20, 2006 Report Share Posted May 20, 2006 stop the torretn, copy the data to another physical (!) hdd and try the torrent there.And if you get also an error in an other BT aplication than that is even more a sign of hardwareerror then! But do not believe us, cause we are idiots, and the FAQ that explaines CRC error is also written by some total moron :-( Link to comment Share on other sites More sharing options...
Ultima Posted May 20, 2006 Report Share Posted May 20, 2006 Also, um, multiple applications accessing the files wouldn't cause CRC errors. That said, if the errors are caused by busted sectors, I wonder if he can actually copy the files =T Link to comment Share on other sites More sharing options...
µtorrent-Guest Posted May 20, 2006 Report Share Posted May 20, 2006 using roadkil's unstopable copier he can copy wahts copyablewww.roadkil.net Link to comment Share on other sites More sharing options...
UezeU Posted May 20, 2006 Author Report Share Posted May 20, 2006 Alright, I am in the middle of transfering the torrent to another computer on my network. It will be done in about an hour. Guest, I appreciate your input and don't get mad, I am just praying this isn't hardware related. So, yes, I am biased in my thinking. You said the second error proved the error was hardware. I don't agree because the error code seems software related. Of course, I could be wrong. I read the faq, but the specific problem I had doesn't seem top follow classic crc symptoms. we will all see soon. I'll post once I get the torrent going on the other computer (damn the slow network!) Link to comment Share on other sites More sharing options...
UezeU Posted May 20, 2006 Author Report Share Posted May 20, 2006 Well....as Ultima predicted the file hung 45 minutes into the transfer. The files have been deleted. BUT WAIT THERE'S MORE. Now for the I told you so section. My computer just suffered a nasty little crash. Seems to be related to interrupts. Anytime utorrent is running my interrupt CPU utilization goes through the roof. It is starting to look a lot like the hardware is going kaput. That was for you Guest, cause you are saying I told you so Anyways, thanks for the help. Time to break out UBCD. Link to comment Share on other sites More sharing options...
Ultima Posted May 21, 2006 Report Share Posted May 21, 2006 Told you so ;PDoes UBCD have some utility like SpinRite for scanning/fixing file systems? Link to comment Share on other sites More sharing options...
Firon Posted May 21, 2006 Report Share Posted May 21, 2006 CRC error = error reported by your HDD/Windows. Means it wasn't able to read the data properly from the disk.I'd suggest getting SpinRite and doing a full level scan Link to comment Share on other sites More sharing options...
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