RE: [ntdev]1394 driver loading

NTDEV
1

Hi Jeseem,

Thank you very much for the help.

I need your help to clarify the following.

  1. For two devices with same type (say two harddisks, SBP-2 support), do I
    have to create two unit directory for each device or just one unit directory
    for two devices?

  2. If I put two Logical_Unit_Number entries for two harddisks under one same
    Unit Directory, how many PDOs will be created?

Could you also tell me what info the system use to load the driver (my very
first question)?

Thanks a lot

James

-----Original Message-----
From: Jeseem [mailto:xxxxx@hotmail.com]
Sent: Thursday, September 07, 2000 3:55 AM
To: NT Developers Interest List
Subject: [ntdev] RE: [ntdev]1394 driver loading

The 1394 bus driver create a pdo for each unit directory.
So if you have 2 unit directories you will have 2 PDOs.

If you have 2 hardisks having same unit directories, two pdo of same type
will be enumerated.

If you have a device with 2 different unit directories, say 1 for 1394
another for 61883,
then 2 different pdos will be enumerated. It is possible for you to have 2
different drivers to handle these different PDOs.

So in short a unit directory of 1394 is considered as a logical device for
windows.

regards
jeseem
mailto:xxxxx@hotmail.com

----- Original Message -----
From: “Zhou, James”
To: “NT Developers Interest List”
Sent: Wednesday, September 06, 2000 2:43 AM
Subject: [ntdev] RE: [ntdev]1394 driver loading

> One more question:
>
> If my 1394 contains two logical units that belong to same type, for
> instance, two IDE hard disks, how may time will the driver be loaded? Or
in
> another words, how many PDOs will be created for this 1394 device?
>
> Thanks
>
> James
>
> -----Original Message-----
> From: Zhou, James [mailto:xxxxx@asia.adaptec.com]
> Sent: Wednesday, September 06, 2000 5:34 PM
> To: NT Developers Interest List
> Subject: [ntdev] [ntdev]1394 driver loading
>
>
> Hi,
>
> I am new to 1394 driver and I just started working on a driver for SBP-2
> device. Can any body tell what information Windows needs from a 1394
device
> to load a driver for it? I.e., in addition to vendor ID, what else is
> needed? ChipID in InfoBlock? unit_spec_id? unit_sw_version? or
> unit_unique_ID leaf?
>
> Thanks in advance
>
> James
>
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