Difference between revisions of "LG NAS N4B1N"

Revision as of 07:01, 23 September 2012

The LG N4B1N Diskless System 4 Bay Super Multi NAS with Built-in Blu-ray Rewriter has four SATA drive bays supporting up to 4TB storage capacity. The NAS comes with a Marvell 88F5281 500MHz processor.

The LG N4B1N supports multiple RAID 0, 1, 5, 1+0 and JBOD volumes, and an on-board LCD screen on the top gives you timely status information of the NAS. A memory card reader on the front panel supports SD, MMC, MS and xD cards for ultra-versatility.

It can be expanded by attaching extra drives to the three USB 2.0 ports. Or, plugging in a printer and share it across the network. An on-board eSATA interface provides data transfer speed of up to 3Gb/s.

It uses Linux Kernel 2.6 with Samba.

Features

• Built-in Blu-Ray ReWriter for additional data backup option & protection
• Hot Swappable and Lockable Trays
• LCD Display shows important information and alerts
• Built-in Memory Card Reader (SD, MMC, MS, xD)
• Remote Access/Multiple User Access
• Network Print Server Support
• Built-in FTP Server Functionality
• Active Directory Support
• Various User Management with Security (Users, Group, Folder)
• Auto Sync. Back Up Support
• iTunes Music Server Support
• One Touch USB/Memory Copy & Synchronized Backup
• Journaled File System
• Quiet Device Operation
• Low Power Consumption
• RoHS Compliant

Upgrading / Adding Drives

The User Manual notes, "Hard disks of size 250GB/500GB/1TB are recommended, all of which should be the same size and of the same company. If the disk sizes differ, the RAID configuration will use the smallest disk as a reference to measure all disk sizes,therefore the remainder can not be utilized and durability decreases."

Support

The LG NAS N4B1N on Newegg.com (discontinued/out of stock).

LG Product Support for N4B1N. The product information and support is not available on the LG United States site, but is available in the LG Canada English site. This product may not have been intended for the U.S. market, however, Newegg.com sold it to U.S. customers. The LG N4B2N and N4B2ND4 are the U.S. products similar to the N4B1N.

recovering deleted files and folders

The massive 26.9 MB 157 page PDF user guide has next to no information on how to recover accidentally deleted files and folders. For this reason, LG gets low marks on documentation.

On page 82 of the user guide (Product Manual) there is a breakdown of the LG NAS Share Management web interface for folders. Item number 7 mentions a "trash box" in passing. "Create a trash box within the folder. When deleting data while the trash box is active, all the deleted files will go to ‘trash box’ folder within the shared folder." And that is all that is written on the subject of undelete / data recovery of files and folders in the entire user guide.

Fortunately, the option to have a trashbox is enabled by default for shares you create. The trashbox is like the Windows recycling bin, but is not directly compatible with the Windows recycling bin.

What is interesting is that the user guide refers to it is the "trash box" and on the actual NAS file system it is called "trashbox," yet in the web interface it is labeled "Recycle Bin."

Any time you delete a file or folder (while at the keyboard of a windows machine) from a share on the NAS device, the files and/or folders are moved into the trashbox folder on the root of the share.

For example, if you have a share named "media" on your NAS, and the NAS netbios name is "server1" then your deleted files and folders are being preserved in \\server1\media\trashbox .

Therefore, if you delete a subfolder called "horror" under the folder "movies" on the share "media" on "server1" (or \\server1\media\movies\horror) then you would find the now absent horror folder actually still alive and well, sitting in the trashbox (or \\server1\media\trashbox) and you could recover it simply by moving it from the trashbox back to its original path, or any path you like for that matter. The deleted folder "horror" and any files within will NOT appear in the Windows recycling bin. The LG NAS uses its own independent version of the recycling bin called trashbox, and recovery is a conventional file copy/move operation.

Pros of the trash box: Prevention of data loss due to the accidental deletion of files and folders. Works independent of the Windows recycle bin to prevent issues related to multiple connected clients, and compatibility.

Cons of the trash box: Causes greater consumption of storage capacity, however, this can easily be negated by manually clearing items from the trashbox folder as desired. Leave it there until you are sure you want it gone, just like users do in relation to emptying the Windows recycling bin.

Tip: When creating new shares on the LG NAS it is highly recommended that you "Enable" the trash box "Recycle Bin" or ensure it is enabled, from within the web administration interface.

Q: How long are files and folders retained in the "trash box" before being purged by the NAS system?

A: This is not stated in the documentation nor in the LG online FAQ. It does appear they get purged by the system, however it is not known how often or under what conditional defined parameters.

Cannot Delete File From NAS Share in Windows

Windows file explorer shows a file on the NAS share with an invalid character in the filename and Windows cannot delete or rename the file. Attempting to delete or rename the file from windows xp reports an error, "Cannot delete file: Cannot read from the source file or disk" and when attempting to delete or rename the file from dos command shell reports, "The system cannot find the path specified."

Example: Somehow, a file was created with a : (colon) in the filename, such as

Budget:Report.xls

The colon causes the file to fail on all Windows file command manipulation. Microsoft Windows has a strange behavior in allowing filenames on NTFS yet, the Operating System is intolerant. To remove the file, a connected Linux based system could be used, or this can be done by enabling FTP on the NAS server and accessing the file system via ftp protocol.

Solution: Go to NAS web interface and enable FTP on the share where the corrupt file exists. From the Windows system go to the DOS command shell (Start, Run, type 'cmd' and press Enter). Use the ftp command.

 ftp 192.168.1.1

Replace the IP address with your NAS server IP or netbios name. In an example where the file Budget:Report.xls is in a folder called deleteme, issue the command 'mdelete deleteme' to rid the file from the folder. The folder remains but the file is gone.