cyclic redundnacy check

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I lost some music files on my hard drive. When I try to copy the files back
on the hard drive from a back up disc, I get this error message, "cyclic
redundancy check". What does this mean?
 
Chris Bondy said:
I lost some music files on my hard drive. When I try to copy the files back
on the hard drive from a back up disc, I get this error message, "cyclic
redundancy check". What does this mean?
Click to expand...

It means that there is a serious hardware error on the
medium that reports the problem. I would replace that
disk.
 
Chris Bondy said:
I lost some music files on my hard drive. When I try to copy the files
back
on the hard drive from a back up disc, I get this error message, "cyclic
redundancy check". What does this mean?
Click to expand...

It means either the disc is stuffed or the optical drive (assuming it's
optical storage), can't read the disc.

Try the disc in a different drive.
 
I think the problem is on the hard drive. The folder on my hard drive had
some music files on it and mysteriously half of them disappeared. When I put
the backup disc in to copy the files onto my hard drive, it says that the
files are already on there, yet I cannot see them. When I copy said files
onto the hard rive anyway, I still cannot see them even after I physically
copied them. I do have the option to show hidden files on.......
 
CRC = Cyclic Redundancy Check is a type of Parity checking. It's the way
a PC validates that content copied or transferred is valid. This type of
error
is fairly common with Optical disks, such as backups. That's why I tell
users
after burning a CD/DVD-R disk to copy the content from it back to a temp
folder on the drive. The general perception is if the burn process is
successful
then the disk is readable - That's not always the case. Many times I'll get
a
call on a backup that's unreadable, really irritates people to have a backup
and then not be able to use the thing.
 
Be aware that if you are using Nero to burn your disks,
in the burn dialog box, there is a check box to verify
the data after burning. I always have that checked - it
is interesting to listen to the drive -- with junk media,
usually about 2/3 of the way through a verify, you hear
the drive starting to change speed and hunt as it tries to
read the data. With good media (I have had good results
with the Japanese Fuji CD-R and Taiyo Yuden DVD-R),
the verify pass starts and just runs to the end with no
change in drive speed. There are also a number of
utilities out there like DVDInfoPro (good and inexpensive),
others for free, that will scan a disk for you and report any
read errors (or areas where it takes multiple passes to read).

mikey
 
Wasn't aware of an "Integrity" tools for media - will have to check
that out. Appreciate the info.
 
Chris said:
I lost some music files on my hard drive. When I try to copy the files back
on the hard drive from a back up disc, I get this error message, "cyclic
redundancy check". What does this mean?
Click to expand...

It means the data transfer process (file copy) has detected an error and
the transferred data has been corrupted. You don't specify what the
backup disc is. That might help.

For a brief, non-technobabble description of CRC error read this:

http://www.softwarepatch.com/tips/cyclic-redundancy.html

Steve N.
 
Pegasus said:
It means that there is a serious hardware error on the
medium that reports the problem. I would replace that
disk.
Click to expand...

It's not nessarily a hardware error, it could be a media error, such as
bad burn on CD/DVD disc. The OP didn't specify what the backup disc
media is.

Steve N.
 
Chris said:
I think the problem is on the hard drive. The folder on my hard drive had
some music files on it and mysteriously half of them disappeared. When I put
the backup disc in to copy the files onto my hard drive, it says that the
files are already on there, yet I cannot see them. When I copy said files
onto the hard rive anyway, I still cannot see them even after I physically
copied them. I do have the option to show hidden files on.......
Click to expand...

Is this the system drive or a second drive/partition?

Use CHKDSK to test the hard drive for errors. For a list of options for
CHKDSK do Start, Run, type in CMD, press enter, in the command window
type in chdksk /? and press enter. I'd run CHKDSK /F /R against the
drive in question.

Steve N.
 
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