Remote Redundant RAID

The safest and highest available form of RAID redundancy is the mirror. Different from typical replication solutions, a failure f one complete side does not even result in a small interruption of the system – all data remain available without interruption. In the best configuration the mirror spreads over two locations, e.g. different IT centers. Two independent RAID systems with SAS and/or SATA disk drives in a RAID 6 are then mirrored on a dual controller head, which results in a RAID 61 configuration. The mirrored volumes are then offered to the servers – ideally over redundant paths/switches.
In this scenario even multiple failure will not result in loss of date availability, e.g. if a complete RAID fails together with 2 disks on the other side, a controller in the head and one switch.
But what if a complete location fails (maybe because of fire)? If it is the side without the head, data are still available. If on the other hand the side with the head fails, data are still there but cannot be accessed immediately. But then a direct connection of the local RAID to the servers can be activated on the switch (alternative path), and within seconds data are available again.
EUROstor builds and installs this kind of solution for her customers. Please call for a tailor-made offer.

RAID spanning two locations:

ES-9200 RAID Head:
• dual active/active controller with ASIC400 technology
• 6 x 4 Gbit FC dual ports for hosts and disk storage
• additional SAS expansion port for connection of SATA JBODs
• operating system independent
• RAID features and warranty like ES-8200
ES-8200 FC/SAS(SATA) RAID:
• 12/16 SAS or SATA-II disks – tp to 24 TB per box
• SATA up to 1 TB per disk
• SAS: up to 450 GB per disk
• Infortrend Controller with ASIC400 technology
• optional dual active/active controller
• 512 MB cache (optional up to 2 GByte) per controller
• battery Backup with dual controller, otherwise optional
• 2 x 4 Gbit FC host interface
• SAS expansion ports: 64 (single) or 48 HDDs (dual ctr.)
• RAID level 0, 1, 0+1, 3, 5, 6, 10, 30, 50, 60, JBOD
• logical drives with different RAID levels
• local and global hot spare disks
• redundant PSUs and fans
• RAIDwatch management over web browser (Ethernet port)
• 3 years warranty, optional Express Exchange or on-site service NBD



datasheet head (pdf)    datasheet ES-8200 SubRAID (pdf)
on RAID technology (html)