Almost succeed until I faced with this issue. In section 8.4, I tried to run the command " cd /tmp && grub-mkrescue --output=grub-img.iso && xorriso -as cdrecord -v dev=/dev/cdrw blank=as_needed grub-img.iso " to make an emergency boot disk, and the terminal reported:
Enabling BIOS support ... xorriso 1.3.8 : RockRidge filesystem manipulator, libburnia project. Drive current: -outdev 'stdio:grub-img.iso' Media current: stdio file, overwriteable Media status : is blank Media summary: 0 sessions, 0 data blocks, 0 data, 17.6g free Added to ISO image: directory '/'='/tmp/tmp.ipplyN6NMZ' xorriso : UPDATE : 252 files added in 1 seconds xorriso : UPDATE : 252 files added in 1 seconds xorriso : NOTE : Copying to System Area: 27651 bytes from file '/tmp/tmp.0IRsUCUztt' ISO image produced: 2244 sectors Written to medium : 2244 sectors at LBA 0 Writing to 'stdio:grub-img.iso' completed successfully. xorriso 1.3.8 : RockRidge filesystem manipulator, libburnia project. xorriso : FAILURE : Drive address '/dev/cdrw' rejected because: not existing and -drive_class 'risky' '/dev' xorriso : HINT : If the address is a legitimate address for a new regular file, prepend "stdio:" xorriso : FAILURE : -as cdrecord: Job could not be performed properly. xorriso : aborting : -abort_on 'FAILURE' encountered 'FAILURE' I do LFS in VMware and I wonder if there is a necessity to prepare an emengency disk because I can take snapshot whenever I want. Thanks for any reply.
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