NAS326 USB CAddy requirements

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duggleb
duggleb Posts: 20  Freshman Member
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I'm using a NAS326 with a USB Caddy as external storage, it appears in storage manager and maps OK

I've tried to add a new caddy & HDD but it does not appear in Storage manager. I've checked on a PC and Windows sees the drive, shows data on the disk so what am I missing when connecting to the NAS.

I've tried the rear USB and the front USB, neither shows the disk, BUT if I plug a USB memory stick into either port they appear in Storage manager as expected

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  • duggleb
    duggleb Posts: 20  Freshman Member
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    Followup

    HAve got the new drive to be recognised, but then later it has dropped out again. If I power off the drive, power it back on, then unplug and reconnect the USB the drive reappears for a while, but then drops out again

  • Mijzelf
    Mijzelf Posts: 2,645  Guru Member
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    That could be a disk sleep problem. The NAS326 uses a daemon 'hd-idle' to spin down disks which have been idle for a (configurable) while. I think you have got an USB-Sata converter which doesn't like that, and switches the bridge off, or something like that.

    A work around could be to remove the disk node from the /dev/ directory, after the filesystem is mounted. hd-idle then cannot spin-down the disk.

    To test that, enable the ssh server, login over ssh, and execute

    ls /dev/sd?
    

    It should show your internal disk(s). Then plugin the usb enclosure, and repeat. Now you should see one more. When the filesystem is mounted, remove the node:

    su
    rm /dev/sdc
    

    assuming /dev/sdc is your external disk. If the disk doesn't disappear now, hd-idle in combination with the usb-sata chip is the problem. Don't know if the disk keeps spinning, there could be an internal spindown mechanism.

  • duggleb
    duggleb Posts: 20  Freshman Member
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    Thanks but when I run ls /dev/sd? I get

    /dev/sda /dev/sdd /dev/sdi /dev/sdl /dev/sdo /dev/sdr /dev/sdu /dev/sdx
    /dev/sdb /dev/sdg /dev/sdj /dev/sdm /dev/sdp /dev/sds /dev/sdv /dev/sdy
    /dev/sdc /dev/sdh /dev/sdk /dev/sdn /dev/sdq /dev/sdt /dev/sdw /dev/sdz

    I have 2 internal disks, 2 USB connected disks so where do the other 20 come from?

  • Mijzelf
    Mijzelf Posts: 2,645  Guru Member
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    Ah right. In that case the '326 doesn't create device nodes when needed, but has everything pre-populated.

    You'll have to find another way to find out which device node to use. On method is looking at the mounts:

    cat /proc/mounts
    

    shows all mounted filesystems as '<device node> <mountpoint> <filesystem> <flags>'

    On a ZyXEL NAS the internal data partitions are mounted on /i-data/* mountpoints, and the external on /e-data/*. There are more mountpoints, but you can ignore them. Probably the device node is not from a disk, but from a partition. /dev/sda is a disk, /dev/sda1 is the first partition on that disk. hd-idle uses the disk node, not the partition node. As the device node is not dynamically generated, it's better to rename it, not delete:

    su
    mv /dev/sdc /dev/sdc_gone
    

    So you can easily revert when needed. (The whole /dev/ directory is created on boot, so a reboot will always revert it). As far as I know the disk node is only used for partitioning, and by hd-idle. But I might be mistaken.

  • lynnwillis
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    The issue you're experiencing with your Zyxel NAS326 not recognizing the new caddy and HDD when connected via USB could be due to several factors. Ensure that the new caddy and HDD are compatible with your NAS326. Not all external storage devices are supported, so check the NAS326's documentation or support resources for a list of compatible devices. Check the format of the new HDD. The NAS326 may not recognize a disk that is not formatted correctly. It's recommended to format the new HDD using the NAS326's file system format options. Make sure that the USB caddy has its own power source or is powered correctly. Some USB caddies require external power, especially when using larger or high-capacity HDDs.

    By going through these troubleshooting steps, you can hopefully identify the cause of the issue and resolve it to have the new HDD recognized by your NAS326.

  • duggleb
    duggleb Posts: 20  Freshman Member
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    Thanks.

    It seems it was a Firmware problem. When I did a NAS "Check for Updates" was told that I was up tp date but this was untrue.

    Downloading the latest Firmware (V5.21(AAZF.14)) instead of the .90 I had , installed and the USB caddy is now accepted OK. It also seems to have solved a niggle that one of the USB drives kept going off line and needed a NAS reboot to resolve

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