Issues while dumping a PC CD-ROM

redumper (build: b664)

arguments: --drive=/dev/sr0 --retries=0 --image-name=dump_DSTRYCMD --overwrite

drive path: /dev/sr0
drive: PLEXTOR - CD-R PX-W5224A (revision level: 1.04, vendor specific: 04/10/06 17:00)
drive configuration: PLEXTOR (read offset: +30, C2 shift: 294, pre-gap start: -75, read method: D8, sector order: DATA_C2_SUB)
drive read speed: <optimal>

current profile: CD-ROM
disc type: CD

image path: .
image name: dump_DSTRYCMD

*** DUMP

disc TOC:
  track 1 {  data }
    index 01 { LBA:      0, MSF: 00:02:00 }
  track A {  data }
    index 01 { LBA: 335411, MSF: 74:34:11 }


media errors:
  SCSI: 0
  C2: 577
  Q: 763

*** DUMP::EXTRA (time check: 1884s)

PLEXTOR: reading lead-in (retry: 1)
PLEXTOR: lead-in found (LBA: [-150 .. 15], sectors: 3016)
PLEXTOR: reading lead-in (retry: 2)
PLEXTOR: lead-in found (LBA: [-150 .. 15], sectors: 4299)
PLEXTOR: storing lead-in (LBA: [-150 .. 15], verified: yes)

*** PROTECTION (time check: 27s)

protection: none

*** REFINE


*** DVDKEY


*** SPLIT

correcting P... done
correcting Q... done

final TOC:
  track 1 {  data }
    index 00 { LBA: [  -150 ..     -1], length:    150, MSF: 00:00:00-00:01:74 }
    index 01 { LBA: [     0 .. 335410], length: 335411, MSF: 00:02:00-74:34:10 }
  track A {  data }
    index 01 { LBA: [335411 .. 335509], length:     99, MSF: 74:34:11-74:35:34 }

analyzing... done (time: 76s)

data disc detected, offset configuration:
  LBA:  -3000 -> 460052, MSF: A2:16:02, count:   2850, offset: -272274576
  LBA:   -150 ->   -150, MSF: 00:00:00, count: 335660, offset: +0

non-zero  TOC sample range: [   -88200 .. +197221668]
non-zero data sample range: [   -42924 .. +197279850]
warning: non-zero data range is not continuous, skipping Universal Hash calculation

disc write offset: +0

warning: lead-in contains non-zero data (session: 1, sectors: 73/73)
checking tracks
errors detected, track: 1, sectors: {SKIP: 0, C2: 577}, samples: {SKIP: 0, C2: 45006}
error: data errors detected, unable to continue