Hi, Maybe slightly off-topic, sorry. People often say "raid isn't for backup", but it seems obvious that it could be, if used in a similar way to tape. For example, if you have raid1 array, and have an 'extra' spare (is spare the correct word) on a removable drive, then it can be constantly creating a copy of the contents of the array which can be removed by failing the backup spare. If you then have a whole series of removable drives, then you can implement whatever off-site backup system you would with tape. The only gotchas I see are : 1) you might have to adjust the backup system to account for the different reliability of tape vs disk 2) you might have to carefully pick the time/way you remove the failed spare. It might be OK to just fail it and hot-remove the disk, but more likely it'll be necessary to take the system to single-user mode or even shut it down competely. Is this a crazy idea? Have people thought of this before? Are there any other gotchas? Max. -- 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
