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From:   Jeff Chua <jeff.chua.linux@gmail.com>
Date:   Wed, 1 Aug 2018 22:52:00 +0800
Message-ID: <CAAJw_Zvaw8yoyejg5T6CtRFjoS4i_EBYKRVWocpH+mpwfaVC1Q@mail.gmail.com>
Subject: Re: How to secure erase PCI-E NVME SSD connected via USB3?
To:     Ming Lei <tom.leiming@gmail.com>
Cc:     lkml <linux-kernel@vger.kernel.org>
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On Wed, Aug 1, 2018 at 1:02 PM, Jeff Chua <jeff.chua.linux@gmail.com> wrote:
> On Tue, Jul 31, 2018 at 7:07 PM, Ming Lei <tom.leiming@gmail.com> wrote:
>> On Sun, Jul 29, 2018 at 5:09 PM, Jeff Chua <jeff.chua.linux@gmail.com> wrote:
>>> I'm testing the USB3-to-PCI-E NVME SSD. It's works using uas module,
>>> recognized it as /dev/sda.
>>>
>>> Since it's an USB device, the nvme-cli tools won't work, nor does
>>> hdparm, as it's a NVME SSD.
>>>
>>> So, how to secure-erase the NVME SSD connected via the JMS583 chip?
>>
>> You may try 'blkdiscard --secure' and see if you are luck.
>
> Interesting, will try that.

# blkdiscard --secure /dev/sda
blkdiscard: /dev/sda: BLKSECDISCARD ioctl failed: Operation not supported

# hdparm --user-master u --security-erase p /dev/sda
(returns immediately and does nothing).

I've tried hdparm on an SSD connected via USB3 and it secure-erased ok.

Anyone working on this?

Thanks,
Jeff