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| Dynavista Model Number | 4420RS | 8420RR |
| Maximum Throughput | Up to 350Mbps | Up to 350Mbps |
| Processor | Pentium 4 2.4GHz with 512KB L2 cache | Pentium 4 2.8GHz with 512KB L2 cache |
| Memory (Maximum Size) | 512MB (2GB Max) | 512MB (2GB Max) |
No. of Memory Slots |
2 Slot | 2 Slot |
| NVRAM | 32K Byte | 32K Byte |
| Network Connectivity | Dual Gigabit Ethernet ports | Dual Gigabit Ethernet ports (Optional PCI Gigabit Copper/Fibre) |
| RAID Levels Support | 0, 1, 5,JBOD, Hot Spare | 0, 1, 5,JBOD, Hot Spare |
| Hot Capacity Expansion | Yes | Yes |
| Hard Drive Roaming | Yes | Yes |
| Volume Dupl. & Migration | Yes | Yes |
| Max. No. of Hot-Swap HDD's | 4 (SATA HDD) | 8 (SATA HDD) |
| No. of Internal Optical / TBU Devices | One Optional Slim Optical device | One Optional Slim Optical device |
| Tape Backup Support | Not Available | Support SCSI TBU |
| Tape Library Support | Not Available | (Optional) |
| Smart Sync | Mirror, Backup, Distribute | Mirror, Backup, Distribute |
| Snap Shot | Yes | Yes |
| Support 256 Snapshots | Support 256 Snapshots | |
| Trend Micro Antivirus | Yes | Yes |
| Smart Extend Initiator | (Optional) | (Optional) |
| Smart Extend Target | Yes | Yes |
| Integrated Network Disc Server & Data Archiving | (Optional) | (Optional) |
| Up to 4096 Volumes with 1GB DDR | Up to 4096 Volumes with 1GB DDR | |
| No. of PCI Slots | Not Available | 1 |
| Form Factor | 1U Rackmount | 2U Rackmount |
| Redundant Power Supply | Not Available | Yes |
Notes: 1 Hot Expansion: Ability to increase the capacity of a RAID group without shutting down the system. With the Hot-Swappable HDDs and RAID Hot Capacity Expansion, it is now possible to expand your storage capacity on demand with maximum system uptime. 2 Hard Drive Roaming: The Drive Roaming technology facilitates the RAID management for NAStorage. You can arrange the locations of the hard disks as you wish without changing RAID configuration or rebuilding the RAID. You can arrange the hard drives in any order you wish, NAStorage will recognize which hard disks belong to the same RAID group and which ones are not. There's no degradation or rebuilding task performed during the process. The administrator can deploy the RAID members easily without any annoyance. 3 Smart Sync: Enable fast data replication and NAS-to-NAS backup by employing differential block transfer to speed up the sync process. All the backups are kept online for easy data restoration. 4 Snap Shot: Ability to create a read-only copy (in a flash of a second) of the contents of a NAS Server at a particular point in time. Users can easily restore previous versions of files or folders without having to contact a system administrator. 5 Smart Extend: Ability to manage storage resource for multiple NAStorage units in the network as a single IP Storage Network. That means better resource utilization, ease of storage management and simpler expansion of storage infrastructure. 6 Integrated Network Disc Server & Data Archiving: The data archiving feature of the NAStorage servers becomes more versatile by integrating with the NAStorage Disc Server function. During data archiving, the NAStorage servers will first move the archive data into disc images, then burn them to optical media, while the NAStorage Disc Servers manage and share CD/DVD discs in the form of disc images. You can define and use policies to move less frequently used files to read-only disc images first, which can be mounted and shared to network users by using the Disc Server function. When the archived disc images are not in use for a long time, you can then choose to burn them to discs, further freeing up hard disk space. |