Re: [GSoC2016] BlueStore SMR Support

[Ric Wheeler <rwheeler@redhat.com>]

On 03/14/2016 08:33 AM, Giridhar Yasa wrote:
> On Mon, Mar 14, 2016 at 5:47 PM, Sage Weil <sweil@redhat.com> wrote:
>> On Sun, 13 Mar 2016, Giridhar Yasa wrote:
>>> On Fri, Mar 11, 2016 at 8:20 PM, Sage Weil <sweil@redhat.com> wrote:
>>>> On Fri, 4 Mar 2016, Shehbaz Jaffer wrote:
>>>>
>>>>> 2) Will scope of project be to build an allocator on a simulator for
>>>>> SMR Drives? Or will I get actual HDDs to work with? In case of
>>>>> simulators, will the project involve building a simulator on disksim?
>>>> I seem to remember hearing something about a dm module that simulated SMR,
>>>> but I'm not sure.  We may also be able to get some SMR disks to play
>>>> with--I'll reach out to our drive vendor friends.
>>> Would that be https://github.com/hgst/libzbc from HGST?
>> Yes.
>>
>> I'm not sure about a disk simulator or actual drive availability,
>> though.
> libzbc has an emulation mode that can use files or block devices to
> emulate SMR disk zones.
>
> Giridhar
>

Just keep in mind that different vendors have different behaviors - you will 
need to tweak it I assume to make it act like the drive you are interested in.

Regards,

Ric