I write at slow speeds anyway (2.4x) normally so can't go much slower.
Is this what you mean for write mode info:
PIONEER DVD-RW DVR-215 1.22 (ATA)
Current Profile: DVD+R DL
Disc Information:
Status: Empty
Erasable: No
Free Sectors: 3,827,520
Free Space: 7,838,760,960 bytes
Free Time: 850:35:45 (MM:SS:FF)
DVD