We have added a new and improved delicated server for data backup purpose.

The server has totally 2TB of RAID-5 storage capacity, we have also developed an improved automatically backup software so that we can DAILY backup ALL paid users data.

It'll replace the old backup server in our existing configuration.

Now all paid users data have 3 copies, 2 of them are mirroring copy (RAID-1). If one of the harddisk get demaged, we can still keep serving with the mirroring harddisk. If we are in really very bad luck and the mirroring harddisk also get demaged before we sync back the RAID-1 to new harddisk, we can still restore data from the RAID-5 daily backup copy. Even if one of the harddisk at our RAID-5 backup array get demaged, we can still restore data from the degraded RAID-5 array!

Only one case may cause unrecoverable data lost: ALL  (2) mirroring harddisks, and more than one harddisk at the backup RAID-5 array, ALL get demaged at the SAME TIME.