The AccuRAID AR424I is a 4U 24-bay quad channel (4x GbE) iSCSI to SAS/SATA RAID subsystem with redundant controller upgradeable option. With built-in 4x 1Gb Ethernet ports supporting independent access, fail-over or load-balancing (802.3ad port trunking, LACP), AR424I is capable of composing a high performance SAN environment with a fraction of the cost of Fibre Channel RAID storage systems. Built-in redundant controller ready backplane allows non-destructive redundancy controller upgrade path without purchasing a brand new hardware. Supporting RAID 0, 1, 1+0, 3, 5, 6, 30, 50, 60 and JBOD, with global or dedicated hot spare disks, multiple hard drive failure could be protected without downtime or data loss. The built-in powerful 64-bit RAID processor provides high performance through-put. The built-in Snapshot feature provides point-in-time copy of saved data without relying on the host software. Management is available via Web and Secure Web (HTTPS), SSH telnet or serial console, with built-in event notification via e-mail or SNMP trap. Redundant power supplies, cooling fans and controllers are part of the modularized design to allow redundancy as well as off-self spare parts to eliminate downtime. To increase the return of investment, AR424I supports both SAS and SATA drives, and could be expanded by adding up to 3 additional SAS/SATA JBOD units (Total storage 96 bays or 288TB). Intended to provide storage solution for IT and vitalization server computing with VMware vSphere or, Microsoft Hyper-V or Citrix with SCSI-3 persistent target support, the AR424I is a perfect solution for Storage Area Network needs in IT and other applications.