Date: Wed, 15 May 2013 15:07:44 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Ajit Jain" <ajit.jain@cloudbyte.com> Cc: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: seeing data corruption with zfs trim functionality Message-ID: <3E9CA9334E6F433A8F135ACD5C237340@multiplay.co.uk> References: <CAA71u6Y5dKZ9O0rqxCpx-9t7DYgTnPZSoNy-iHOnmzrOUYp%2Bvw@mail.gmail.com> <60316751643743738AB83DABC6A5934B@multiplay.co.uk> <20130429105143.GA1492@icarus.home.lan> <3AD1AB31003D49B2BF2EA7DD411B38A2@multiplay.co.uk> <C6AA4D0A7C49469ABB3C7440B1BCC108@multiplay.co.uk> <CAA71u6Zh7BbbdC=utqfR2MD1Nn=9euUDXHKqqu9NyBG-Jx%2B=Ow@mail.gmail.com> <9681E07546D348168052D4FC5365B4CD@multiplay.co.uk> <CAA71u6ZuO9CF0ECFS4z07-E5qPea-6SfNwkvhr_g6pFT5MV5yQ@mail.gmail.com> <CAA71u6YKGHDRVg6W_xnCNaA68bJvAZ2Lkp-UisiPqb1vKjJhfA@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Unless you have the latest CAM patches, which is in current, you wont be
doing TRIM on SATA disk connected to an LSI controller.
I've just tested using the following cmd under 8.3 with MFC'ed changes from
current, using ATA_TRIM, UNMAP & WS16 and have had no issues on a machine
with Intel SSD and LSI controller.
./iotest -t 20 -s 536870912 -W 100 -T 500 /test/iotest/
I did however notice that your test is hardly doing any disk access apart
from when its "Initializing test file....", instead it seems to be CPU bound,
so not sure if there's a problem with the iotest code or with my command
line args?
Given this my current thinking is either:
1. There's a problem with your patches
2. There's a bug in the FW of the Seagate disk
3. There's a problem with the UNMAP code which is being trigged by your disk
only.
I think #3 is quite unlikely.
If you could install a recent version of current and test with that it
should rule out #1, leaving #2.
Regards
Steve
----- Original Message -----
From: "Ajit Jain" <ajit.jain@cloudbyte.com>
> Hi Steve,
>
> One more thing I am not seeing data corruption with SATA SSD (kingston).
> The issue was seen on SAS SSD i.e. Seagate PULSAR ST100FM0002 .
>
> regards,
> ajit
>
>
> On Wed, May 15, 2013 at 1:49 PM, Ajit Jain <ajit.jain@cloudbyte.com> wrote:
>
>> Hi Steven,
>>
>> Please find the tar ball of src code and binary of the test utility
>> attached with the mail.
>> Steps of test:
>> 1. Enable zfs trim in /boot/loader.conf (vfs.zfs.trim_disable=0)
>> 2. Set the delete method of the ssd device as UNMAP or WS16.
>> 3. Create a pool (and optionally dataset) on the device.
>> 4. Run iotest utility with thread count 10 (-t option) file size as at
>> least 5GB
>> Second to execute as at least 500 sec (-T option) and write as 100% (W
>> option).
>>
>> regards,
>> ajit
>>
>>
>> On Wed, May 15, 2013 at 12:56 PM, Steven Hartland <killing@multiplay.co.uk
>> > wrote:
>>
>>> Could you provide us with details on the tests your using so we can
>>> run them here on current sources and see if we see any issues?
>>>
>>> Regards
>>> Steve
>>>
>>> ----- Original Message ----- From: "Ajit Jain" <ajit.jain@cloudbyte.com>
>>> To: "Steven Hartland" <killing@multiplay.co.uk>
>>> Cc: "freebsd-fs" <freebsd-fs@freebsd.org>
>>> Sent: Wednesday, May 15, 2013 6:47 AM
>>>
>>> Subject: Re: seeing data corruption with zfs trim functionality
>>>
>>>
>>> Hi Steven,
>>>>
>>>> Thanks for the follow-up.
>>>> The code where I pulled in zfs trim patches is not updated to 9 stable
>>>> specially the cam directory.
>>>> I pulled in many dependent patches in order to apply the patches that you
>>>> gave. After that all da devices
>>>> CAM_PERIPH_INVALID in dadone() because read capability was returning a
>>>> very
>>>> big number (bigger than MAXPHYS)
>>>> for the block size. I think this is because I have not update the code
>>>> to 9
>>>> stable (only pulled in required patches and miss
>>>> some patches).
>>>>
>>>> So, I am planning to first update my code to 9stable and then try the
>>>> same
>>>> test again. That might take some time.
>>>>
>>>>
>>>> thanks again,
>>>> ajit
>>>>
>>>>
>>>> On Wed, May 15, 2013 at 2:40 AM, Steven Hartland <
>>>> killing@multiplay.co.uk>**wrote:
>>>>
>>>> ----- Original Message ----- From: "Steven Hartland"
>>>>>
>>>>> What version are you porting the changes to?
>>>>>
>>>>>>
>>>>>>>> What SSD are you using?
>>>>>>>>
>>>>>>>> What LSI controller are you using?
>>>>>>>>
>>>>>>>>
>>>>>>> I'd also like to see "zpool status" (for every pool that involves this
>>>>>>> SSD) and "gpart show" against the disk itself.
>>>>>>>
>>>>>>>
>>>>>> Also:
>>>>>> 1. What FW version is your LSI? You can get this from dmesg.
>>>>>> 2. The exact command line your running iotest with?
>>>>>>
>>>>>>
>>>>> Any update on this? I'd like to try and replicate your test here so
>>>>> would appreciate as much information as possible.
>>>>>
>>>>>
>>>>> Regards
>>>>> Steve
>>>>>
>>>>> ==============================****==================
>>>>>
>>>>> This e.mail is private and confidential between Multiplay (UK) Ltd. and
>>>>> the person or entity to whom it is addressed. In the event of
>>>>> misdirection,
>>>>> the recipient is prohibited from using, copying, printing or otherwise
>>>>> disseminating it or any information contained in it.
>>>>> In the event of misdirection, illegible or incomplete transmission
>>>>> please
>>>>> telephone +44 845 868 1337
>>>>> or return the E.mail to postmaster@multiplay.co.uk.
>>>>>
>>>>>
>>>>>
>>>>
>>> ==============================**==================
>>> This e.mail is private and confidential between Multiplay (UK) Ltd. and
>>> the person or entity to whom it is addressed. In the event of misdirection,
>>> the recipient is prohibited from using, copying, printing or otherwise
>>> disseminating it or any information contained in it.
>>> In the event of misdirection, illegible or incomplete transmission please
>>> telephone +44 845 868 1337
>>> or return the E.mail to postmaster@multiplay.co.uk.
>>>
>>>
>>
>
================================================
This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it.
In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337
or return the E.mail to postmaster@multiplay.co.uk.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3E9CA9334E6F433A8F135ACD5C237340>