QNAP TS-420U 4-Bay 2.5 or 3.5 SATA I/II 1U iSCSI NAS, 1GB RAM, Single Disk/JBOD/RAID 0/1/5/5+Hot Spare/6/10, Marvell 1.6 GHz, USB2.0/3.0, Hot-Swappable

The Qnap TS-420U 4-Bay 2.5" or 3.5" SATA I/II 1U iSCSI NAS is an All-in-One rack mount network attached storage (NAS) server optimized for small and medium businesses looking for an affordable yet high performance network storage solution. The TS-420U can hold up to 4 hard drives and is designed to be easily installed in the server room and configured with up to 12TB of storage capacity. The TS-420U is an ideal solution for centralized data backup, cross-platform file sharing, iSCSI/IP-SAN storage combo solution and a number of business applications. Moreover, the TS-420U offers exceptionally low power consumption, reliable system operations and capacity expandability. Besides, the intuitive MyCloudNAS service simplifies the process of publishing content residing on the TS-420U over the Internet and helps the IT administrator create private cloud storage in just a few simple steps. The mobile app QMobile provides users with an iOS or Android mobile device with a convenient way to access the TS-420U on the go.

Cross-platform Sharing with Antivirus
The TS-420U supports SMB/CIFS, NFS and AFP protocols for file sharing across Windows, Mac, Linux/UNIX networks. User accounts and shared folders can be created via the user-friendly web-based interface without IT expertise. The integrated antivirus solution for the TS-420U ensures business continuity by offering detection against the latest viruses, malware, worms and Trojan horses.

Windows Active Directory (AD) and LDAP Directory Service
The Windows AD and LDAP (Lightweight Directory Access Protocol) directory service features enable the IT administrator to retrieve user accounts from Windows AD or LDAP-based directory server to the TS-420U, reducing time and effort in account setup. Users can use the same login name and password to access the TS-420U. In addition, the TS-420U can also be configured as an LDAP server and allows devices with LDAP protocol enabled to be joined in the directory and share the same user accounts and groups.

Shared Folder Aggregation
Access the shared folders of other servers on Microsoft Networking through the "portal folder" on the TS-420U. This saves the time and effort in logging in multiple servers one by one.

ISO File Archiving and Sharing
The TS-420U supports mounting ISO images of CD and DVD discs as network shares for data archiving, storage and sharing. This feature saves the space for storing the physical discs, reduces the risk of data loss caused by disc wearing and tearing and enhances the efficiency of data sharing on business network.

Advanced Folder Permissions
Advanced folder permissions allow users to configure folder/subfolder access to the TS-420U. With this feature enabled, users can manage the folder permissions from Microsoft Windows or the web-based management interface of the TS-420U easily.

Well-rounded Backup Solutions
The TS-420U offers the IT administrator flexible server backup solutions, including encrypted remote replication, Real-time Remote Replication (RTRR) and cloud-based storage backup. Windows users and Mac users can use Qnap NetBak Replicator utility and Time Machine respectively to back up data to the TS-420U. Furthermore, the TS-420U supports third party backup software such as Veeam Backup & Replication and Acronis True Image.

Disaster Recovery Solution
The TS-420U offers users peace of mind, business continuity and high availability of data by providing the ability to recover their data from disasters.

Real-time Remote Replication
Real-time Remote Replication (RTRR) provides real-time or scheduled data replication between the TS-420U and a remote Qnap NAS, an FTP server or an external drive.

iSCSI LUN Snapshot/Backup
Server virtualization reduces IT expenditure yet provides flexible server management. Adopting a proper data protection and disaster recovery for virtual machines has become vastly important. The TS-420U has taken iSCSI LUN backup/restore to a whole new level with snapshot technology. The IT administrator can use the LUN snapshot to back up contents in the LUN to various storage destinations, including Windows shared folders via SMB/CIFS, Linux shared folders via NFS or local shared folders on the TS-420U.

Cloud Storage Backup
Get ready to send private data to the clouds. The TS-420U supports Amazon S3, ElephantDrive and Symform cloud storage backup which have several backup modes including real-time, scheduled backup and versioning control so that the data can be restored from any point of time. With ElephantDrive cloud storage can be monitored through a web browser. An extra set of all of the data stored will always be available, so remote data recovery is quick and simple.

Backup to external drive via USB3.0
The IT administrator can connect external storage devices to the Turbo NAS via the eSATA or USB ports and back up data in the NAS shared folders to the external devices. Three backup modes are provided: instant, scheduled and automatic backup. The Turbo NAS features USB 3.0 ports for high speed backup to external hard drives. EXT3, EXT4, NTFS and HFS+ file systems are supported to ensure compatibility with Windows, MacOS X and Linux operating systems.

NAS + iSCSI Combo Solution
The TS-420U can serve as a NAS for file sharing and iSCSI storage concurrently.

Flexible Management
The TS-420U supports multiple LUNs (Logical Unit Numbers) and iSCSI targets. LUNs can be flexibly mapped to, unmapped from and switched among different iSCSI targets.

Secure Deployment
Designed with CHAP authentication and LUN masking, the advanced ACL (Access Control List) offers the capability to block unauthorized access from the initiators.

Private Cloud Storage
The TS-420U helps users reap all the benefits of cloud computing. A private cloud for business use can be built easily. This cloud provides flexible ways for data access, sharing and backup, virtually anytime, anywhere.

MyCloudNAS Service
The MyCloudNAS service simplifies the process of publishing contents in the TS-420U over the Internet. It provides a web-based portal for file management and access and supports backing up important data from the TS-420U to other cloud storage providers such as Amazon S3, ElephantDrive and Symform.

MyCloudNAS Access Code
While exposing the TS-420U to the Internet could raise security concerns, the MyCloudNas Access Code provides privacy control to make selected services only visible to authorized users.

Email Invitation
The MyCloudNAS provide an easy way to send out an email invitation to friends. The invitation contains step-by-step instructions on accessing the TS-420U. It also provides a link to download the Windows application MyCloudNAS Connect that allows people even without proficient networking skills to easily set up and connect to the TS-420U.

Mobile Apps for On-the-go Access and Monitoring
Qfile is an app for users to browse and manage the files on the Turbo NAS. Qmanager turns users' mobile devices into a remote control and helps monitor and manage the Turbo NAS. Terabytes of photos, music and videos stored on the Turbo NAS are ready to be streamed by Qmobile from anywhere regardless of the actual storage size of the mobile devices. Qmobile also provides a convenient way for uploading photos from the mobile devices to the Turbo NAS for instant sharing.

Advanced RAID Management with Hot-swap Design
The TS-420U offers RAID 0, 1, 5, 6, 10, 5+hot spare, single and JBOD disk configurations. It also supports hot-swap design so that a failed member drive of a RAID configuration (RAID 1 or above only) can be replaced by hot swapping without turning off the server.

Global Hot Spare
The Global Hot Spare feature allows the IT administrator to share spare drives with multiple RAID volumes on the TS-420U. When a hard drive fails in any RAID volume, the global hot-spare drive will automatically replace the failed drive to prevent data from being lost. Compared with a local spare drive, the Global Hot Spare function offers more efficient use of spare drives.

Online RAID Capacity Expansion
The storage capacity of a RAID configuration can be expanded by replacing larger hard drives. All the data will be kept and seamlessly moved to the newly installed hard drives without turning off the server.

Online RAID Level Migration
Upgrade the disk configuration to a higher RAID level with the data retained without turning off the server.

IP-SAN/ iSCSI Storage and Virtual Disk Drives (VDD) for Storage Expansion
The TS-420U provides a cost-efficient iSCSI solution to set up an IP-SAN storage. With the built-in iSCSI initiator, the TS-420U can also connect to other iSCSI targets over the network and turn them into virtual disk drives (VDD).

User-friendly System Management
Configure the SMTP server and SMS server settings on the Turbo NAS in order to receive instant system warning or error messages via email and SMS. Collect the information, warning or errors of the TS-420U and send warnings up to 3 SNMP servers for centralized management and real-time monitoring. Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.) helps the IT administrator monitor hard disk status. Moreover, the TS-420U supports Hard Drive Health Scan (HHS) for disk checking and bad blocks scanning.