Re: [usb-storage] [Merging ATA passthru] on integrating SMART/ATA-Security in usb-storage driver

thomas schorpp
2005-11-07T20:07:16Z

Alan Stern wrote:
> On Mon, 7 Nov 2005, thomas schorpp wrote:
>
>
>>>I don't think blacklisting is a good way to do this. In principle any USB
>>>mass storage device -- any SCSI device, in fact -- might have a
>>>vendor-specific pass-thru needing special handling.
>>
>>no. that would be not industry best practice and uneconomical sw effort.
>
>
> Adding vendor-specific codes to SCSI devices isn't industry best practice?
> I can't argue with that, but it is very common nevertheless.

not for all the cheap noname consumer stuff around. maybe in your scsi-320 server
world i cant afford.

>
> Is it an uneconomical software effort? Ridiculous -- it's not software at
> all, it's part of the firmware.

i thought were speaking of OS drivers here?

>
>
>>remember this devices are mainly "designed for windows" and WHQL certification
>>is expensive for every single driver. and ms has only one driver for all usb storage
>>right now, all boxes and sticks i had here use it.
>
>
> I think you have a very limited view of how devices are "designed".
> Besides, I specifically said I was talking about _all_ SCSI devices, not
> just USB ones.
>

yes, for the second sentence, this is made clear now.

>
>>> It doesn't have to be
>>>correlated with the vendor, the product, the SCSI level, the transport, or
>>>anything else.
>>
>>yes. the sheet for design recommended cypress chips state all ATACB and ATA-Security.
>>i would be make no sense to implement different behaviuors in chips for the same purpose.
>
>
> That's what Cypress does, sure. But who says that other vendors have to
> copy Cypress? For the most part they don't. Neither does T10.

they dont copy cypress, they want to reduce costs, processes and resulting
"standards" should be compatible, therefore.

>
> As for whether it makes no sense -- you have your point of view. Business
> people have a very different point of view; to them it might make
> excellent sense, to help secure a competitive advantage.

:D i'm no business man. i am a generalist and i just want to lock my external hdd.

>
> Alan Stern
>
> -

tom schorpp