Buffalo Forums

I'm running a LS-CHL1.0TL-AP Linkstation that's had 4 years running and is still going.  Several years ago I attached a large (1TB) external HDD to the USB port on the linkstation, and maped a separate network drive letter to it. The usbdrive is formatted to FAT32 because 1) there was no alternative offered in the web management page despite the recommendation in the manual, and 2) windows doesn't allow XFS or EXT3 formats separately.

Using the usbdrive to store small to medium size multi-media files has been and is not an issue.  But lately, I began to cut/paste to that usbdrive video (.mpg) files that were comparatively large - 600Mb, nearly 900Mb and 1.2Gb.  As the file size got bigger, there was a noticeable slowing down of the access time before copy began, and at the 1.2Gb size, the device basically delivered a "cannot access device, ensure it is connected to the LAN" message on the windows desktop doing the copy/paste action.  Repetitively. Copying that file internally between drives and folders in the desktop is not a problem.  Creating a second file of the 1.2Gb size, storing it internally in desktop at a different source location, and then copy/paste to the NAS-attached usbdrive fails the same way.

See attached screenshot of the explorer interface and the error message box

After these failures, read and write of smaller files to the device works fine.

The current physical usbdrive is only 8 months old (replaced one which failed internally), and it has passed a series of disk diagnostic testing.  The windows explorer tool doing the copy/paste is patched, and happily displays the folder and files on the usb drive, and reads from it opening the related application and plays it (eg the windows wildlife.wmv file).  The explorer-like drive Buffalo LS-CH navigator responds the same way. Which just leaves the NAS itself as the source of this problem, which passes thru the mapped drive connectivity.

The failing 1.2gb file is smaller than the limit of FAT32, thus it should work.  But doesn't.

Is there a known history of the NAS causing this sort of effect?  Any help and suggestions would be appreciated.

Davidk

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The maximum file size for FAT32 is 4GB, so I don't see that file size is the issue.

First off, connect your drive to your computer and see if you can't transfer your files directly to your drive Via USB, if you still get the problem, then:

My advice would be to back up your data from your drive and then connect your drive to your PC so that you can do a full format, this will show if there has been any defects that have developed on the drive.

If you would like to format your drive to XFS, then you could always use something like http://gparted.sourceforge.net/

Check the website to make sure you have the latest firmware. Didn't see you mention it, and don't rely on the autoupdater to always inform you of the latest version.

Do you only see this copying to USB and not to the NAS drive itself?