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Pihro's avatar
Pihro
Aspirant
Jan 27, 2014

External Backup Drive Working But Not Recognized?

We have 2 3TB WD External USB drives we use for backup on our ReadyNAS 312. When the drives are using 4096 bytes per sector it can cause backup problems with Windows 7 Backup, so we keep them formatted to 512 bytes-emulation per sector. We haven't been doing this until recently, and now that we have, connecting the drive to the ReadyNAS 312 brings up this system message:
System: External storage device 'WDC WD30EZRX-00D8PB0' connected, but could not find a known filesystem on it.

We do not use Windows 7 Backup with the ReadyNAS, we just keep the drives formatted like this in case we end up using the drive on someone else's machine for backup.
We would like to know if this is any kind of a problem (it backs up completely normal). If anyone has any info on this, thanks!

8 Replies

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  • Ki_Adi_Mundi's avatar
    Ki_Adi_Mundi
    NETGEAR Employee Retired
    seems it can't recognize the filesystem on it , what filesystem on it ? And anything in dmesg ?
  • It is on NTFS with 512-byte emulation, the only change was the 4096 to the 512. Despite it not being able to recognize the filesystem, the backups still seem to work fine. I was mainly wanting to know if it not recognizing the filesystem can cause real problems now or later on.
  • Ki_Adi_Mundi's avatar
    Ki_Adi_Mundi
    NETGEAR Employee Retired
    interesting, the message means it can't be recognized by the NAS, so it will not be mounted, backups shouldn't work. Did I miss sth ? can you show me cmd "mount" in your nas ?
  • Ki-Adi-Mundi wrote:
    interesting, the message means it can't be recognized by the NAS, so it will not be mounted, backups shouldn't work. Did I miss sth ? can you show me cmd "mount" in your nas ?

    I'm not sure what you are asking for, but I can give you the logs here:
    System: External storage device 'WDC WD30EZRX-00D8PB0' connected, but could not find a known filesystem on it.
    System: External storage device connected

    And so far I haven't had a single backup problem.
  • mdgm wrote:
    What version of ReadyNAS OS are you running?

    ReadyNAS OS 6.1.6
  • Ki_Adi_Mundi's avatar
    Ki_Adi_Mundi
    NETGEAR Employee Retired
    Pihro wrote:
    Ki-Adi-Mundi wrote:
    interesting, the message means it can't be recognized by the NAS, so it will not be mounted, backups shouldn't work. Did I miss sth ? can you show me cmd "mount" in your nas ?

    I'm not sure what you are asking for, but I can give you the logs here:
    System: External storage device 'WDC WD30EZRX-00D8PB0' connected, but could not find a known filesystem on it.
    System: External storage device connected

    And so far I haven't had a single backup problem.


    sorry, I was thinking you are using ssh to get the logs, so want you run some shell command .
    Did you see this log every time when you insert the usb to NAS ? can you see the usb share on the readynas web UI ?
  • Yes, I see this every time I connect. I can see the USB Share, yes. It works just fine.

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