to all: thanx for the info and the link!
to hub: bp is burn proof technology that the plextor uses to keep from getting buffer under run. the bp activity 1 means burn proof kicked in once during burn. my slight understanding is the laser stops writing momentarily allowing cache to fill again.
from plextor site:
Plextor University - BURN-Proof Technology
What exactly is BURN-Proof?
“Buffer-UnderRuN-Proof Technology” was patented by Sanyo Electric Co. to prevent Buffer UnderRuns. BURN-Proofâ„¢ is accomplished by a combination of drive hardware, firmware, and supported writing software. This technology makes it possible for the user to write and multitask on their PC, where previously they could not. Lower performance PCs benefit by being able to perform high-speed recording, and do not have to suspend their work, close applications, or remove network connectivity when they are recording.
What is a “Buffer-UnderRun”?
A Buffer UnderRun occurs when the PC cannot deliver data fast enough to the drive’s buffer. If the drive’s buffer empties because of the lack of data, the laser will turn off. The resulting gap on the media usually renders a CD-R disc unusable. A CD-RW disc can be erased and re-recorded in this case.
How is BURN-Proof accomplished?
BURN-Proof is accomplished by a combination of drive hardware, firmware, and writing software that supports BURN-Proof. The drive’s firmware monitors the buffer level, waiting for the buffer to drop to a predetermined threshold. This threshold is normally below 10% of the total drive buffer capacity. Once the buffer drops below this threshold, BURN-Proof will pause the writing phase and memorize where the write left off. When the drive’s buffer returns to an adequate level, the writing continues where the last write left off.
How Does The Software Enable BURN-Proof?
When the writing software (i.e. Roxio Creator, Plextor Manager 2000) mounts the drive, a bit in the drive table is enabled to add the BURN-Proof functionality.
Which drives integrate BURN-Proof Technology?
The PX-W1210TA, PX-W1610TA, PX-W2410TA, PX-S88TA, PX-S88TU, PX-W1210TS, PX-W2410TU, PX-4012TA and any future CD-RW drives.
For Drives Without BURN-Proof, How Do I Prevent A Buffer-UnderRun?
Check the following:
Close all other programs (especially those that can activate on their own).
Disable in the taskbar: schedulers, animated icons, power managers, and anti-virus software.
Disconnect from the network.
Defragment your hard drive, clean out old files in your “Windows/Temp” directory.
While recording, be sure to not do anything on the PC.