PX4-300D Lenovo EMC NAS Device Stuck at 95%

KB ID 0001381


I decided to update the firmware on my PX4-300D 16TB NAS Device, (big mistake!) I had some lunch and went to see how it was getting on, I could no longer connect to the device via web or SSH. It had done this to me once in the past when It had a failed drive, simply removing the drives rebooting and then putting the drives back in got me going last time.


So I got on the Lenovo forums, it’s full of posts with the same problem, and theres hope! They do a tool that you can load from USB that you can boot your device from and it will re-image it. But you cant download it, you need to log a call to Lenovo to get it, Which I attempted to do but a) It sends you to IBM support which is terrible, and b) I’m out of warranty and not supported.

So I could download the firmware that ‘bricked’ my “worth over a thousand quid” device, but not the tool to rescue it? No amount of searching yielded a result.


What I did find was a post with a link to the re-imaging tool for another device, but when I looked at the URL, I noticed that the filename was the same at the firmware version name, it simply had a .zip extension not a .tgz extension. Why is that important? Well what if I used the same URL but put in my firmware version and changed the file extension, that wouldn’t work would it?


PLEASE BE AWARE, I LOST ALL MY DATA WHILE RE-IMAGING! But I’d rather have a working NAS than a broken one! SEE UPDATE BELOW

You get a full set of instructions in the zip file, but basically, you need a FAT32 formatted USB Drive, run the executable file, point it at the USB drive, then boot the NAS with the USB drive in it AND the reset button pressed (for 60 seconds). you will then see this;

When finished, the device shuts down, simply power it back on

UPDATE: Received 040118

Prior to having the opportunity to try your solution, I received a reply from Lenovo.  The tech sent a link to an older version of the software.  The difference is that he told me… “on your unit the OS is actually stored on the NAS and not on the HDD’s, so you can do this process without losing information, all you need to do is to remove the HDD’s while using the USB stick on the NAS, once that the process is complete you can insert the drives back. If you leave the HDD’s inside, the process will wipe them.”

I removed the drives (stacking to preserve slot order in case it mattered).  Flashed the unit.  It then shut down.  I restarted and it booted to “Insert drives”.  I powered the unit down, then reinserted the drives in the same slots they came out of.  Booted unit and NO DATA LOSS!! You can imagine how thrilled I am.  (Thanks Dennis)


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Author: PeteLong

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  1. Hi Dennis.

    Were your drives setp with any RAID? I have a PX4-400D with the same problem and can’t loose the 16Tb of data…

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    • Remove the drives when you do the update/rescue and the data will be preserved 🙂

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  2. Hi,

    just to say that it works with the rear usb POrt.

    Thanks Again

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  3. We found this article from one of our customers. Indeed the path to find a correct support may not be clear, here is a direct link to contact support for Iomega/Lenovo NAS units: http://download.lenovo.com/lenovoemc/eu/en/app/ask/index.html

    Does not matter if your device is out of warranty, we can still assist you (no replacement of faulty parts though). So you can all contact us in such situations without worries about device warranty and we will provide you with latest available version of imager.

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    • Hi, Kudos to Lenovo Support for adding the above, well played.


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      • Thanks, Pete, for posting the solution.

        Is px4px6-4.1.308.34385 the imager that I can use on a PX4-400D ?

        I believe the Lenovo-EMC support is no more.

        Post a Reply
        • I couldn’t comment I only know what worked for me buddy


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        • Hello Albert:

          Do yo resolve your problem?
          I have the same

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          • Additional tips:
            1. Don’t forget to remove all HDDs from the nas before the procedure. Otherwise all data will be removed.

            2. download .zip via this link (for PX4-400d it is https://download.lenovo.com/nasupdate/asgimage/b4b-4.1.406.34763.zip ) -> unzip -> launch .exe -> select USB drive -> install image. If during the installation you’ll see an error just cancel the installation, do nothing with USB drive (don’t format it again) -> restart imager and set same drive letter during the installation.
            3. Put the USB drive in TOP LEFT USB PORT on the back of the device -> push reset button on the back using someshing like a pin -> turn the device on and wait 60 seconds (don’t release a reset button during this 60 seconds).

            It works for me. PeteLong thanks a lot for the instruction. You are my hero! =)

  4. Hello Pete, thanks for posting.
    I’ve recovered my unit with this tutorial as expected.
    You’ve save my day.

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  5. Thank a lot. I really took so long to find a solution. It worked perfect with my px4-300d. So grateful.

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    • Thanks for the feedback, this is an old post, glad it’s still helping people out 🙂


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  6. You, sir, are a life-saver. I had a PX6 with the dreaded stuck at 95% problem, and the link above has fixed it. Next time I’m in Middlesbrough I’m buying the first three rounds.

    Many thanks


    Post a Reply
    • 🙂 Cheers David, Glad this is still helping people out!


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  7. All who can’t find a solution, read my another post + this tip to download .zip with a firmware.

    Tip http://download.lenovo.com/lenovoemc/ap/en/index.html – this is a main support site. I got the link from Lenovo after 6 emails (it got 6 days, bravo Lenovo!).

    There you can find proper firmware for your device. When you have a link for downloading .tgz like http://download.lenovo.com/nas/lifeline/b4b-4.1.406.34763.tgz take b4b-4.1.406.34763.tgz, modify it to b4b-4.1.406.34763.zip and put it after https://download.lenovo.com/nasupdate/asgimage/ -> https://download.lenovo.com/nasupdate/asgimage/b4b-4.1.406.34763.zip

    I’ll NEVER EVEY BUY ANYTHING with Lenovo logo.

    Best regards, Andrew.

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