I've got a running system here but upon setup of the box I did not think about founding it all on a redundancy solution of some sort, first choice would have been a RAID 1. Anyway, now I am here with the problem that my main drive might fail any time.
Moving data to a temp location, re-setting-up the system, and moving data back is *currently* no option. But installing another harddrive and mirroring all data as a sort of "near RAID 1" would be an option.
No, what technique would you recommend to copy or clone my main drive? I could think of a near-realtime solution, with a cron, let's say every 20 minutes, to copy/identify new data. But what tool can help me with that?
And- is there a way to exactly clone the drive, including bootrecords etc. so in a case of failure of drive 1, I just need to switch cables over to drive 2? Is there a way to do it incrementally, so the clone process doesn't start from scratch each time (peformance!)
Any hints and tool recommendations welcome!