cdrecord of install iso fails

[Will Senn <will.senn%gmail.com@localhost>]

    Hi my Inspiron N4110 won't
      boot off of the USB installer images, but it works just fine from
      the CDROM images from the install isos. I want to be able to have
      a netbsd only ecosystem for my explorations with the os, so I read
      up in the guide about using cdrecord to burn an iso image,
      downloaded the NetBSD-10 installer iso and then tried cdrecord on
      the iso as directed. It refused to write the image, complaining
      about track 1 having unkown length. I dug around for a bit and
      found xfburn in the repo, and that worked fine. Here is the output
      from the cdrecord session. Any help in figuring out why cdrecord
      wasn't successful would be great. In the grand scheme of things,
      xfburn is great, but I hate it when the simple fails!
      
      Will
      
    cdrecord v /dev/cd0d
      NetBSD-10.0-amd64.iso
      Cdrecord-ProDVD-ProBD-Clone 3.02 2024/03/18
      (amd64-unknown-netbsd10.0) Copyright (C) 1995-2019 Joerg Schilling
      TOC Type: 1 = CD-ROM
      Using libscg version 'schily-0.9'.
      SCSI buffer size: 61440
      No target specified, trying to find one...
      Using dev=31,0,0.
      atapi: 1
      Device type    : Removable CD-ROM
      Version        : 0
      Response Format: 2
      Capabilities   : 
      Vendor_info    : 'PLDS    '
      Identifikation : 'DVD+-RW DS-8A5SH'
      Revision       : 'XD12'
      Device seems to be: Generic mmc2 DVD-R/DVD-RW/DVD-RAM.
      Current: DVD+R/DL
      Profile: DVD+R/DL (current)
      Profile: DVD+R 
      Profile: DVD+RW 
      Profile: DVD-R/DL sequential recording 
      Profile: DVD-RW sequential recording 
      Profile: DVD-RW restricted overwrite 
      Profile: DVD-RAM 
      Profile: DVD-R sequential recording 
      Profile: DVD-ROM 
      Profile: CD-RW 
      Profile: CD-R 
      Profile: CD-ROM 
      Profile: Removable Disk 
      Using generic SCSI-3/mmc-3 DVD+R driver (mmc_dvdplusr).
      Driver flags   : NO-CD DVD MMC-3 SWABAUDIO BURNFREE FORCESPEED 
      Supported modes: PACKET SAO
      Drive buf size : 817152 = 798 KB
      cdrecord: Warning: Cannot read drive buffer.
      cdrecord: Warning: The DMA speed test has been skipped.
      FIFO size      : 4194304 = 4096 KB
      Track 01: data  unknown length
      Track 02: data   622 MB        
      cdrecord: Track 1 has unknown length.
      cdrecord: Use tsize= option in SAO mode to specify track size.