On 3/26/2014 9:44 PM, Tide wrote: > Stan Hoeppner <stan <at> hardwarefreak.com> writes: >> >> On 3/26/2014 3:00 PM, Tide wrote: >> ... >>> ================= >>> Array 2 (RAID 6): >>> ================= >>> # mdadm --examine /dev/sdb1 >> ... >>> Raid Level : raid6 >>> Raid Devices : 5 >> ... >>> Bad Block Log : 512 entries available at offset 72 sectors >> >> The RAID6 array has sectors on each drive reserved for bad block >> reassignment. The RAID5 array does not. >> >> This is the answer to your mystery. > "The RAID6/RAID5 array", do you mean my RAID array (just this instance), or > you mean "all RAID6/RAID5 arrays created by mdadm" ? My reply above is unambiguous. I quoted your array data and gave an answer that applies to your provided array data. WRT your other questions, I do not have time to research the answer to those, and wouldn't spend it on that if I did. I have never used CentOS nor Fedora, and don't plan to ever use either. For those answers, either wait for someone to answer, or research it yourself. Cheers, Stan -- 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