Currently, if you want to protect your data against bit-rot on a single device you must have 2 btrfs partitions and mount them as Raid1. The requested option will save the user from partitioning and will provide flexibility.
Yes, I know: This will not provide any safety againts hardware failure. But it is not the purpose anyway. The main purpose is to "Ensure Data Integrity" on: a- Computers (ie. laptops) where hardware raid is not practical. b- Backup sets (ie. usb drives) where hardware raid is an overkill. Even if you have regular backups, without having "Guaranteed Data Integrity" on all data sets, you will lose some data on some day, somewhere. See discussion at: http://hardware.slashdot.org/story/13/12/10/178234/ask-slashdot-practical-bitrot-detection-for-backups Now, the futuristic and OPTIONAL part for the sufficiently paranoid: The number of duplicates may be parametric: mkfs.btrfs -m dup 4 -d dup 3 ... (4 duplicates for metadata, 3 duplicates for data) I kindly request your comments. (At least for "-d dup") Regards, Imran Geriskovan -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
