Re: [PATCH] scsi: vpd pages are mandatory for SPC-2

[Hannes Reinecke <hare@suse.com>]

On 03/15/2016 06:19 PM, Douglas Gilbert wrote:
> On 16-03-15 08:42 AM, Christoph Hellwig wrote:
>> On Tue, Mar 15, 2016 at 08:28:42AM +0100, Hannes Reinecke wrote:
>>> But it feels even sillier having to whitelist every
>>> standards-conformant device here; I certainly was when I figured
>>> that EMC Clariion won't work properly without this patch.
>>>
>>> And the idea was to mark off _misbehaving_ drives, not the other way
>>> round.
>>
>> It's the idea, but it has to prove workable as well in the end.
>>
>> That being said I'd prefer to allow Hannes patch in and see what
>> the fallout is.
> 
> I don't have many drafts archived for SPC-2 but the two that I do have:
>    spc2r18.pdf [20000521]
>    spc2r20.pdf [20010718]
> 
> indicate that those two VPD pages were made mandatory right at the
> end of the draft cycle for SPC-2. spc2r20.pdf was the last draft
> prior to the standard and it does show them as mandatory in table 185
> on page 218. The corresponding table in spc2r18.pdf does not have
> a column indicating whether the listed VPD pages are mandatory or
> not (or words that I can find in the description of VPD pages 0x0
> and 0x83 to suggest they are mandatory).
> 
The point here is not so much whether the pages are mandatory, but
whether access to VPD pages crashes the device.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		               zSeries & Storage
hare@suse.com			               +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
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