Hello. I'd like to ask you to implement the following ... The current RAID1 solution is not robust enough to protect the data against random data corruptions. Such corruptions usually happen when an unreadable sector is found by the drive's electronics and when the drive's trying to reallocate the sector to the spare area. There's no guarantee that the reallocated data will always match the original stored data since the drive sometimes can't read the data correctly even with several retries. That unfortunately completely masks the issue, because the sector can be read by the OS without problems even if it doesn't contain correct data. Would it be possible to implement chunk checksums to avoid such data corruptions? If a corrupted chunk is encountered, it would be taken from the second drive and immediately synced back. This would have a small performance and capacity impact (1 sector per chunk to minimize performance impact caused by unaligned granularity = 0.78% of the capacity with 64k chunks). Please, let me know if you find my request reasonable or not. Thanks in advance. Regards, Jaromir. -- Jaromir Capik Red Hat Czech, s.r.o. Software Engineer / BaseOS Email: jcapik@xxxxxxxxxx Web: www.cz.redhat.com Red Hat Czech s.r.o., Purkynova 99/71, 612 45, Brno, Czech Republic IC: 27690016 -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
