Scenario 3 with pure remote backup if I can. Mostly first backup in second hdd and 2nd backup in remote location.
We had mirroing solution and do NS trick before but cause more trouble and cost more. The best solution in hardware failure was notice the customer that server was or will be down for few hours before they notice it. Excersize restore procedure before it happen and make sure it can be done in a few hours. That's how we do.
Originally posted by miltongoh Web Server A is equip with RAID to do mirroring.
Keep in mind that a RAID mirror is never a replacement for backups. It serves to protect against downtime and data loss due to hardware failure, but remember that if you have data corruption, it will corrupt both disks, not just one.
Originally posted by miltongoh Hmmm. What is the most common type of remote backup done by you guys?
We usually recommend that people keep local backups on a 2nd hard drive for quick restores, and then use Rsync to perform a remote backup. Since Rsync uses smart synchronization to figure out what files have been updated since the last backup, it is much more efficient than FTP.