Problems writing to intel P3700 NVMe drive

[Pavilion Storage]

John
Here is the outputs with if=/dev/zero and oflag=direct and you can see
the error.
thx
Kishore
------------------------------------------------------
[root]# dd if=/dev/zero of=/dev/nvme0n1 oflag=direct bs=512
count=1000000 conv=notrunc
1000000+0 records in
1000000+0 records out
512000000 bytes (512 MB) copied, 77.6635 s, 6.6 MB/s
-----------------------------------------------------------
[root]# dd if=/dev/zero of=/dev/nvme1n1 oflag=direct bs=512
count=1000000 conv=notrunc
dd: writing '/dev/nvme1n1': Input/output error
1+0 records in
0+0 records out
0 bytes (0 B) copied, 0.0212549 s, 0.0 kB/s
-------------------------------------------------------------
[root]# ./nvme write /dev/nvme0n1 -s 0 -z 4096 -d /dev/zero
write: success
-------------------------------------------------------------
[root]# ./nvme write /dev/nvme1n1 -s 0 -z 4096 -d /dev/zero
write:WRITE_FAULT(2280)
[root]#

On Wed, May 27, 2015 at 5:24 PM, j cagle <jcagle at gmail.com> wrote:
> Hi Kishore,
>
> dd won't write anything if you use if=/dev/null.  You should use
> if=/dev/zero instead. (This is probably what Greg intended.)
>
> John
>
> On Wed, May 27, 2015 at 6:53 PM, Pavilion Storage
> <storagepavilion at gmail.com> wrote:
>> Greg
>>
>> Here is the output from the dd command on a good (non-intel;
>> /dev/nvme0n1) and bad (intel drive; /dev/nvme1n1). There is no
>> difference in displayed output of dd, but the write is successful in
>> the non-intel drive. The nvme-cli command tool correctly shows the
>> failure to write, but offers no further clues beyond the failed
>> status.
>>
>> thx
>> Kishore
>>
>> -------------------------------------------------------
>> [root]# dd if=/dev/null of=/dev/nvmen0n1 bs=512 count=1000000 conv=notrunc
>> 0+0 records in
>> 0+0 records out
>> 0 bytes (0 B) copied, 1.62e-05 s, 0.0 kB/s
>> [root]#
>> -----------------------------------------------------
>> [root]# dd if=/dev/null of=/dev/nvme1n1 bs=512 count=1000000 conv=notrunc
>> 0+0 records in
>> 0+0 records out
>> 0 bytes (0 B) copied, 0.00032024 s, 0.0 kB/s
>> [root]#
>> ---------------------------------------------------------
>> [root]# ./nvme-cli write /dev/nvme0n1 -s 0 -z 4096 -d /dev/null
>> write: success
>> [root]# ./nvme-cli write /dev/nvme1n1 -s 0 -z 4096 -d /dev/null
>> write:WRITE_FAULT(2280)
>> ---------------------------------------------------------
>>
>> On Wed, May 27, 2015 at 4:05 PM, Greg Schulz <greg at storageio.com> wrote:
>>> 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 at 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 at 3:34 PM, Greg Schulz <greg at 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
>>>>
>>>>
>>>> Greg Schulz  |  Sr. Advisory Analyst  |  greg at storageio.com Phone
>>>> 651-275-1563  |  twitter @storageio  |  blog www.storageioblog.com
>>>> Server StorageIO and UnlimitedIO LLC aka StorageIO  |
>>>> www.storageio.com
>>>>
>>>> Author of the books:
>>>> Cloud and Virtual Data Storage Network (CRC Press & Intel Recommended
>>>> Reading List) The Green and Virtual Data Center (CRC Press & Intel
>>>> Recommended Reading List) Resilient Storage Networks – Designing
>>>> Flexible Scalable Data Infrastructures (Elsevier)
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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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