mast dvd

[Mason]

ho prob con un mast dvd (benq 1620)

il mast masterizza, anche con dma(almeno cosi sempra)

solo che quando cerco di accederci per la lettura (ogle)

hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x44Aborted Command LastFailedSense 0x04 
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x44Aborted Command LastFailedSense 0x04 
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x44Aborted Command LastFailedSense 0x04 
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x44Aborted Command LastFailedSense 0x04 
hdc: DMA disabled
hdc: ide_intr: huh? expected NULL handler on exit
hdc: ATAPI reset complete
hdc: command error: status=0x51 { DriveReady SeekComplete Error }
hdc: command error: error=0x54
ide: failed opcode was 100
ATAPI device hdc:
  Error: Illegal request -- (Sense key=0x05)
  Read of scrambled sector without authentication -- (asc=0x6f, ascq=0x03)
  The failed "Read 10" packet command was: 
  "28 00 00 00 02 74 00 00 40 00 00 00 00 00 00 00 "
end_request: I/O error, dev hdc, sector 2644
Buffer I/O error on device hdc, logical block 330
Buffer I/O error on device hdc, logical block 331
Buffer I/O error on device hdc, logical block 332
Buffer I/O error on device hdc, logical block 333
Buffer I/O error on device hdc, logical block 334
Buffer I/O error on device hdc, logical block 335
Buffer I/O error on device hdc, logical block 336
Buffer I/O error on device hdc, logical block 337
Buffer I/O error on device hdc, logical block 338
Buffer I/O error on device hdc, logical block 339
Buffer I/O error on device hdc, logical block 340
Buffer I/O error on device hdc, logical block 341
Buffer I/O error on device hdc, logical block 342
Buffer I/O error on device hdc, logical block 343
Buffer I/O error on device hdc, logical block 344
Buffer I/O error on device hdc, logical block 345
hdc: command error: status=0x51 { DriveReady SeekComplete Error }
hdc: command error: error=0x54
ide: failed opcode was 100
ATAPI device hdc:
  Error: Illegal request -- (Sense key=0x05)
  Read of scrambled sector without authentication -- (asc=0x6f, ascq=0x03)
  The failed "Read 10" packet command was: 
  "28 00 00 00 02 b4 00 00 40 00 00 00 00 00 00 00 "
end_request: I/O error, dev hdc, sector 2772
Buffer I/O error on device hdc, logical block 346
Buffer I/O error on device hdc, logical block 347
Buffer I/O error on device hdc, logical block 348
Buffer I/O error on device hdc, logical block 349
Buffer I/O error on device hdc, logical block 350
Buffer I/O error on device hdc, logical block 351
Buffer I/O error on device hdc, logical block 352
Buffer I/O error on device hdc, logical block 353
Buffer I/O error on device hdc, logical block 354
Buffer I/O error on device hdc, logical block 355
Buffer I/O error on device hdc, logical block 356
Buffer I/O error on device hdc, logical block 357
Buffer I/O error on device hdc, logical block 358
Buffer I/O error on device hdc, logical block 359
Buffer I/O error on device hdc, logical block 360
Buffer I/O error on device hdc, logical block 361
Buffer I/O error on device hdc, logical block 362
Buffer I/O error on device hdc, logical block 363
Buffer I/O error on device hdc, logical block 364
Buffer I/O error on device hdc, logical block 365
Buffer I/O error on device hdc, logical block 366
Buffer I/O error on device hdc, logical block 367
Buffer I/O error on device hdc, logical block 368
Buffer I/O error on device hdc, logical block 369
Buffer I/O error on device hdc, logical block 370
Buffer I/O error on device hdc, logical block 371
Buffer I/O error on device hdc, logical block 372
Buffer I/O error on device hdc, logical block 373
Buffer I/O error on device hdc, logical block 374
Buffer I/O error on device hdc, logical block 375
Buffer I/O error on device hdc, logical block 376
Buffer I/O error on device hdc, logical block 377
hdc: command error: status=0x51 { DriveReady SeekComplete Error }
hdc: command error: error=0x54
ide: failed opcode was 100
ATAPI device hdc:
  Error: Illegal request -- (Sense key=0x05)
  Read of scrambled sector without authentication -- (asc=0x6f, ascq=0x03)
  The failed "Read 10" packet command was: 
  "28 00 00 00 02 94 00 00 02 00 00 00 00 00 00 00 "
end_request: I/O error, dev hdc, sector 2644
Buffer I/O error on device hdc, logical block 330
hdc: command error: status=0x51 { DriveReady SeekComplete Error }
hdc: command error: error=0x54
ide: failed opcode was 100
ATAPI device hdc:
  Error: Illegal request -- (Sense key=0x05)
  Read of scrambled sector without authentication -- (asc=0x6f, ascq=0x03)
  The failed "Read 10" packet command was: 
  "28 00 00 00 02 94 00 00 02 00 00 00 00 00 00 00 "
end_request: I/O error, dev hdc, sector 2644
Buffer I/O error on device hdc, logical block 330

con interfaccia scsi ancora peggio, un po di oops nel kernel e non riesco a leggere dvd-video(manco provato il resto, pero ora sono su questo)
Da notare che con atapi il dvd lo leggo, ma senza dma scatta(almeno penso sia i ll dma).

posso settare il dma sul device, ma appena leggo qualcosa vedo gli errori nel dmesg e setta il dma a 0.

kernel: 2.6.10-cko