Like every other website on the planet, SmallNetBuilder uses cookies. Our cookies track login status, but we only allow admins to log in anyway, so those don't apply to you. Any other cookies you pick up during your visit come from advertisers, which we don't control.
If you continue to use the site, you agree to tolerate our use of cookies. Thank you!

Router Charts

Click for Router Charts

Router Ranker

Click for Router Ranker

NAS Charts

Click for NAS Charts

NAS Ranker

Click for NAS Ranker

More Tools

Click for More Tools

NAS Reviews

Introduction

SonicWALL CDP 2440i

At a Glance
Product SonicWALL CDP 2440i Appliance (01-SSC-6301)
Summary Smart, Secure Network Backup Device
Pros • Ease of use, simple configuration
• Automatic backups of key data
• Offsite storage for disaster recovery
• “Bare Metal” backup functionality
Cons • No gigabit Ethernet
• Offsite storage requires subscription
• Can slow down network on initial installation

Here on SmallNetBuilder, we've reviewed numerous NAS and storage devices for saving and keeping copies of critical data on your network. Brace yourselves folks, this review is about a new type of data storage technology, one significantly different from a NAS.

CDP, or Continuous Data Protection, is an emerging technology in data storage and backup products that takes the administration and scheduling out of running backups—even enabling end users to restore lost files, as well as providing a solution for offsite disaster recovery—all on a disk-based network appliance. 

SonicWALL has a line of CDP appliances for the small-to-medium business, based on the technology acquired through the purchase of Lasso Logic back in 2005. (See the SonicWALL press release). There are four products in the SonicWALL CDP line, ranging from the 1440i to the 4440i. The 1440i is designed to support a network with 15 PCs and three Servers, while the 2440i I'm reviewing can handle up to 30 PCs and five Servers. The higher-level CDP products, the RAID 1 based 3440i and RAID 5 based 4440i, handle greater numbers of PCs and Servers. The 3440i is rated for up to 75 PCs, while the SonicWALL spec sheet simply lists the 4400i as capable of handling more than 75 PCs.

From a technology standpoint, continuous data protection systems manage your data differently than traditional backup systems and software. Traditional backup devices allow for full, incremental, or differential backups. As you know, full backups make complete copies of the designated drives and/or folders. Differential backups make full copies of each file that has changed since the last full backup. Incremental backups make full copies of each file that has changed since the last full or incremental backup.

Continuous Data Protection differs by monitoring when the local machine writes to disk. When write activity occurs in a monitored folder on a PC, the updates are then backed up over the network to the CDP device, creating a continuous update of files.

The continuous data protection solution saves byte or block-level differences rather than file-level differences. This means that if you change one byte of a 100 GB file, only the changed byte or block is backed up. This saves on storage space over traditional incremental and differential backups, which make copies of entire files. In addition, continuous data protection works, uh, continuously, while backup systems run at specific intervals or schedules.

Some files may be updated hundreds of times, and it could get messy if all those changes were saved by the CDP. The CDP will save a maximum of 15 versions of a file, always keeping a copy of the original and latest version, and then a staggered subset of versions to prevent excessive disk utilization.

To summarize, continuous data protection is a more intelligent, efficient, and dynamic backup system, saving only the small amount of data that has changed, and doing so in real time instead of at static intervals.

More NAS

Wi-Fi System Tools
Check out our Wi-Fi System Charts, Ranker and Finder!

Support Us!

If you like what we do and want to thank us, just buy something on Amazon. We'll get a small commission on anything you buy. Thanks!

Over In The Forums

Hi Merlin,My ideas are as follows:1. If you're running in stealth mode. Perhaps still who tte the Internet led light 'RED' when Ethernet WAN link is d...
Hi! I have recently switched from AiMesh to an access point/repeater configuration. Please forgive this very basic question-- I have never used either...
Hey folks ! Three months ago, I purchased an awesome asus RTAC86U in replacement of my old wifi router a/b/g who served for almost 10 years. The chang...
Hi all. I’m having all sorts of issues with 32799. Devices, both wired and wireless, keep resetting and/or hanging. Can anyone recommend a good stable...
Hello,I recently upgraded my AC-66U to a 3100 and am now able to run the latest firmware and feature set, running much better as well. I ran the Merli...

Don't Miss These

  • 1
  • 2
  • 3