Problems writing to intel P3700 NVMe drive

[greg@storageio.com (Greg Schulz)]

Thanks for the follow-up and extra info, I have 3700s running on x86/64 Ubuntu 14.04 and working fine.
I did update the drivers from the Intel site even though they were already in the 14.04 kernel when I was troubel shooting something else.
What happens if you do a dd if=/dev/null of=/dev/nvme0n1 bs=512 count=1000000 conv=notrunc
Cheers gs


-----Original Message-----
From: Linux-nvme [mailto:linux-nvme-bounces@lists.infradead.org] On Behalf Of Pavilion Storage
Sent: Wednesday, May 27, 2015 5:41 PM
To: greg at storageio.com
Cc: linux-nvme at lists.infradead.org
Subject: Re: Problems writing to intel P3700 NVMe drive

Greg,
I am running this on Linux (Ubuntu/3.12) and I am accessing the raw device (/dev/nvme1).

I have tried accessing with dd, nvme-cli and fio Thx Kishore

On Wed, May 27, 2015@3:34 PM, Greg Schulz <greg@storageio.com> wrote:
> I may have missed it somewhere, what OS (and version) are you using?
> Also are you accessing the nvme device e.g. /dev/nvme0n1 raw or via 
> partition or filesystem?
> Gs
>
>
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> -----Original Message-----
> From: Linux-nvme [mailto:linux-nvme-bounces at lists.infradead.org] On 
> Behalf Of Pavilion Storage
> Sent: Wednesday, May 27, 2015 4:30 PM
> To: linux-nvme at lists.infradead.org
> Subject: Problems writing to intel P3700 NVMe drive
>
> I am having problems with writing to an intel P3700 NVMe drive on a 
> ARM based platform and I would appreciate any help in debugging this problem.
> Here are my experiments and observations so far:
>
>    - The drive is usable for read operations and I can run fio 
> (randread,
> etc) but I cannot write to it.
>    - Other manufacturer's NVMe drive can be inserted into this 
> platform and I can write to it
>    - I can insert the intel P3700 into an x86 host and I can perform 
> write operations
>    - I have tried using the nvme-cli
> (https://github.com/linux-nvme/nvme-cli) tool and have read the error 
> codes from read. It just shows 'WRITE_FAULT' which is not very helpful.
>    - I have looked at the SmartLog reports and the 'Critical Warning'
> is 0, i.e. the device is not in Read-Only mode
>    - I have updated the firmware using the intel SSD-DataCenterTool 
> and updated the firmware on the drive the latest available version.
> The updated drive works fine on x86 platform.
>
> I think there is some combination of the platform and drive that is 
> causing the problem. Can anyone offer pointers on how to debug this?
>
> Thx
> Kishore
>
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