>First of all, if the data is mostly static, rsync might work faster. Any operation that stats the individual files - even to just look at timestamps - takes about two weeks. Therefore it is hard for me to see rsync as a viable solution, even though the data is mostly static. About 400,000 files change between weekly backups. >I take it sdc and sdd using SATA don't influence each other? Correct. >However you will endure a rebuild on md0 when you re-add the disk, but >given everything is mounted read-only, you should not practically be >doing anything If the rebuild operation is a no-op, then that sounds like a great idea. If the rebuild operation requires scanning over all data in both drives, I think that's going to be at least as expensive as the current 10 hour process. Thanks for the suggestions so far. Cheers, 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
