dd clone hard drive: Input/Output Error though "chkdsk" says OK
- by unknown (google)
Hi,
I've used dd to clone hard drives before using 'dd' and a live cd, but have run into a problem.
The issue:
dd fails with an "Input/Output Error" on /dev/sda3 , even though windows "check disk" (chkdsk) says it's ok.
Context:
Trying to replace my laptop hard
drive w/ a faster one of the same
size
Laptop has NTFS on a 320gb hard drive
Booting into knoppix
Knoppix recognizes 'original' drive
(/dev/sda)
I am using a usb
connection for ‘new' drive
(irrelevant, but just an fyi)
Knoppix recognizes the usb drive as /dev/sdb
Using dd, as follows:
dd if=/dev/sda of=/dev/sdb
"dd" gives the I/O error above at
82Gb (out of 320Gb)
I then tried
checking each partition as follows
and found it failed on /dev/sda3:
dd if=/dev/sda1 of=/dev/null
dd if=/dev/sda2 of=/dev/null
dd if=/dev/sda3 of=/dev/null
I have ran windows xp chkdsk on the
offending drive in both "find only" and "find and fix" mode and it reports no errors
Question
How can I find and fix the error on my original hard drive partition (i.e. /dev/sda3) so that dd reads it successfully?
