>Proposed solution is to use software raid mirror. Before backup starts, >break the soft mirror unmount and backup partition I use this method for backup once a week. One challenge is drives aren't great at steaming data quickly (for the resync) while also doing a lot of random access. Having a little extra redundancy (think 3 or more drives in the RAID-1) can really help. >If you can be certain that the device that you break out of the mirror >is never altered, then you could add an internal bitmap while the >array is split and the rebuild will go much faster. Is this also a viable speedup for the "kep rotating backup drives through the array" strategy? If so, how much speedup are we talking about? Assume the array changes by 1% before a backup drive gets rotated in again. Jeff - 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
