 
 
| Features | Free | Standard | Ultimate | SDK/Source | 
| CHAP user authentication |  |  |  |  | 
| Number of concurrent connections per target | 5 | Unlimited | Unlimited | *1 | 
| Number of Targets can be created | Unlimited | Unlimited | Unlimited | *1 | 
| Number of connections per initiator-target nexus (Multiple connections feature) | 1 | Unlimited | Unlimited | *1 | 
| iSCSI RAM disk support |  |  |  |  | 
| Standard image disk device support |  |  |  |  | 
| Multi-user mutual CHAP authorization support |  |  |  |  | 
| Virtual CD/DVD-ROM emulator support |  |  |  |  | 
| Virtual CD/DVD-RW burner with auto-loader support |  |  |  |  | 
| Generic SCSI device (SPTI) support |  |  |  |  | 
| RAID-1 (Mirror) feature |  |  |  |  | 
| Asynchronous Replication over Internet |  |  |  | *1 | 
| Automatic snapshot replication |  |  |  | *1 | 
| High-availability (failover) feature |  |  (<2T) |  | *1 | 
| COW protection (Virtual Write) |  |  |  | *1 | 
| Virtual Hard Disk (VHD) support |  |  |  | *1 | 
| Virtual Hard Disk (VHD) snapshot |  |  |  | *1 | 
| Virtual Hard Disk (VHDX) support |  |  |  | *1 | 
| Image File (IMG) snapshot |  |  |  | *1 | 
| Volume Shadow Copy Compatible |  |  |  |  | 
| Windows GUI control application |  |  |  |  | 
| IPsec on-the-fly iSCSI network line encryption |  |  |  |  | 
| I/O read and write caching |  |  |  |  | 
| Multiple level tier and SSD / Persistent Memory Cache |  |  |  |  | 
| Security disks for each client, each client use own disk which use CHAP password encrypted |  |  |  | *1 | 
| IP address and mixed authentication mechanism |  |  |  | *1 | 
| CHAP user management tool |  |  |  |  | 
| Network-bridged(exports an existing partition, disk, CD/DVD-ROM to clients as a virtual iSCSI drive) |  |  |  |  | 
| Remote Burning (via SPTI) |  |  |  |  | 
| Remote Tape Backup (via SPTI) |  |  |  |  | 
| Vendor Specified CDB support (via SPTI) |  |  |  |  | 
| True real-time Continues Data Protection (CDP) |  |  |  | *1 | 
| Software RAID |  |  |  | *1 | 
| Distributed iSCSI SAN(Datacenter) |  |  |  | *1 | 
| CHAP users counts | Unlimited | Unlimited | Unlimited | Unlimited | 
| Client side snapshot management |  |  |  |  | 
| Storage Pool and Snapshots |  |  |  | *1 | 
SUPPORT
