Hi List, We have a Linux Software RAID1 (mirroring). If there is a little error on one of the disks (such a little error that the kernel dosn't recognize it). There is a read request on the raid for a specific file. The output of one of the disks differ from the output of the other disk. (But there are no errors recognized by the kernel / fs / raid-driver. Only one inverted bit for example) What is RAID/MD doing? Are there checksums for the original file? Timo - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html