Most recent kernel where this bug did not occur:
2.6.10

Distribution:
Kernel 2.6.18 from kernel.org
Ubuntu 5.10/6.06/6.10
SuSE 9.3/10.0/10.1
Fedora Core 4

Hardware Environment:
 Shuttle XPC SN85Gv2
  Motherboard FN85
  NVIDIA nForce3

  AMD Athlon(tm) 64 Processor 2800+

  RAID bus controller: Silicon Image, Inc. (formerly CMD Technology Inc) SiI
3512 (rev 1)
  Harddisk
  Vendor: ATA Model: SAMSUNG SP1614C Rev: SW10
  Type: Direct-Access ANSI SCSI revision: 05

Software Environment:

Problem Description:
Writing data on a SATA drive sometimes (5 - 10%) failed. Files have the right
size but differ in their md5 checksums. Older kernel versions work fine
(2.6.10). The problems still occurs in the kernel version 2.6.18 from kernel.org
(Linux linux 2.6.18 #1 SMP PREEMPT Tue Oct 3 16:58:22 CEST 2006 x86_64 GNU/Linux)

I changed memory and harddisk (including cable).

Steps to reproduce:
copy same 100MB file some times and calculating checksum.