Question about Set Streaming Command

keiji_katata at keiji_katata at
Mon Oct 1 04:55:15 PDT 2001

* From the T10 Reflector (t10 at, posted by:
* keiji_katata at

Hi Xin,

I have no idea. You must control using "Maximum Number of Descriptors".
By the way, recent CD-R/RW drives control its writing speed automatically.
But their speed is very high. Why do you need to know the details of the

Keiji Katata

reply to mtfuji5 at

to:   mtfuji5 at
cc:   mtfuji5 at, owner-mtfuji5 at, t10 at
      (bcc: Keiji Katata/Pioneer)
subject:  Re: Question about Set Streaming Command

Hi, Keiji-san,

Thank you very much for your reply.

As per the document, there may be several performance segments or
performance extent  on one media? If there is any limit to the number of
performance extents on one media?

Thank you very much,

Xin Li
Oak Technology,  Inc.
139 Kifer Court, Sunnyvale, CA 94086
Phone:(408)616-6127  Fax:(408)523-6524
Email: XinLi at

                    keiji_katata at post.pio
                             To:     XinLi at
                    Sent by:                     cc:     t10 at,
mtfuji5 at
                    owner-mtfuji5 at avc-pio        Subject:     Re: Question
about Set Streaming Command

                    09/25/2001 06:38 PM
                    Please respond to

Hi Xin,

Would you refer to This file
has example of performance descriptor.
To control the Write speed, in my understanding, most inner portion (LBA=0)
data transfer rate and rotation control is used. (Sometimes, BUFE bit in
write parameter mode page is referred.) Because spindle motor rotation
speed makes limit of data transfer rate.

Usually, Read Speed is controled by drive automatically. So I think setting
read speed does not so much meaning and highest or equal to write speed may
be used.


Keiji Katata

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