SONY USA released information about the types of writable disc that can be used with the DRU-500A and DRX-500UL DVD/CD rewritable drives. As SONY says "...The DRU-500A and DRX-500UL DVD/CD rewritable drives are designed for best performance with discs produced by major disc manufacturers. In most cases, there is no problem as long as you use discs conform to various CD and DVD industry standard. However, some of discs on the market do not meet the recognized quality and performance standards. With the DRU-500A and DRX-500UL, we recommend the disc manufacturers and discs below. Further information about write errors, when writing data to the DVD-R of some of disc manufacturers, has been presented..." Recommended DVD+Rs and DVD+RWs

Disc manufacturers and discs certified for operation with the DRU-500A and DRX-500UL drives are:

DVD+Rs
Sony Corp. Disc labeled for use at 4x speed
Mitsubishi Chemical Co. Ltd. Disc labeled for use at 4x speed
Ricoh Co., Ltd. Disc labeled for use at 4x speed

DVD+RWs
Sony Corp. Disc labeled for use at 2.4x speed
Mitsubishi Chemical Co., Ltd. Disc labeled for use at 2.4x speed
Ricoh Co., Ltd. Disc labeled for use at 2.4x speed

Recommended DVD-Rs and DVD-RWs

Disc manufacturers and discs certified for operation with the DRU-500A and DRX-500UL drives are:

DVD-Rs Note Concerning the Use of DVD-Rs

Sony Corp. Disc labeled as "DVD-R for General ver 2.0" conformed
Mitsubishi Chemical Co., Ltd. Disc labeled as "DVD-R for General ver 2.0" conformed
TDK Corp. Disc labeled as "DVD-R for General ver 2.0" conformed
Pioneer Video Corp. Disc labeled as "DVD-R for General ver 2.0" conformed* and disc labeled for use at 4x speed
Taiyo Yuden Co., Ltd. Disc labeled as "DVD-R for General ver 2.0" conformed

DVD-RWs
Sony Corp. Disc labeled as "DVD-RW ver 1.1" conformed
Mitsubishi Chemical Co., Ltd. Disc labeled as "DVD-RW ver 1.1" conformed
TDK Corp. Disc labeled as "DVD-RW ver 1.1" conformed
Pioneer Video Corp. Disc labeled as "DVD-RW ver 1.1" conformed and disc labeled for use at 2x speed

Write errors may occur when using the following DVD-Rs with the Sony DRU-500A and DRX-500UL drives.

DVD-R for General manufactured by Verbatim Co., Ltd.: Discs with the following designation sold in European regions between July 2002 and 11th October 2002.

DRR47U5( for PC Data )
DRR47V5( for Recording )

DVD-R for General manufactured by Pioneer Video Corp.: Discs with the following designation sold in European regions between May 2002 and 11th October 2002.

DVD-R 4.7PS, DVD-R 4.7PS X5,
DVD-R 4.7PWS( for PC Data )
DVD-R 120VS, DVD-R 120VSX5,
DVD-R 120PWS( for Recording )