From e26dcc7bafc2d5999506ff60a7d54f5e91f19d4a Mon Sep 17 00:00:00 2001 From: Thomas Schmitt Date: Fri, 11 Nov 2011 17:27:52 +0000 Subject: [PATCH] Some clarifications in wiki/QemuXorriso --- doc/qemu_xorriso.wiki | 19 ++++++++----------- 1 file changed, 8 insertions(+), 11 deletions(-) diff --git a/doc/qemu_xorriso.wiki b/doc/qemu_xorriso.wiki index 33baef6d..a92a8afd 100644 --- a/doc/qemu_xorriso.wiki +++ b/doc/qemu_xorriso.wiki @@ -20,15 +20,13 @@ qemu start command : -net nic,model=ne2k_pci \ -net user,hostfwd=tcp::5557-:22 \ -hda /dvdbuffer/i386-install.qemu \ - -drive file=/dev/sr2,if=none,id=scsicd \ + -drive file=/dev/sr2,if=none,id=scsicd,format=raw \ -device virtio-blk,drive=scsicd,logical_block_size=2048,physical_block_size=2048 \ -cdrom .../some_image.iso }}} -With this setup of -drive and -device it is necessary to have a readable -medium in the drive, when qemu gets started. Else it will refuse to start -with a message about missing medium or with an i/o error if the medium -is blank. +With this setup of -drive and -device it is necessary to have a +medium in the drive, when qemu gets started. Else it will refuse. The guest system is accessible via ssh and scp at port 5557 of the host system. @@ -417,17 +415,16 @@ sessions contain ISO 9660 filesystem images, which successively build on each other. So from the view of xorriso commands, the only task which makes -them differ from sequential media. is to apply optional formatting -to DVD-RW or BD-R. +them differ from sequential media, is to apply optional formatting +or re-formatting. A special case are BD-R, which xorriso may format but will not bring into (pseudo-) overwritable state. Formatted BD-R perform Defect Management by default, which checkreads during writing and replaces -bad block. Nice idea in theory. My practical experience is not so good. -Ill media stay ill media and should be replaced as soon as possible. +bad block. -Formatting of unused DVD+RW and BD-RE is done by xorriso automatically. -Just start a normal write run. DVD-RAM are sold formatted. +The mandatory formatting of unused DVD+RW and BD-RE is done by xorriso +automatically. Just start a normal write run. DVD-RAM are sold formatted. xorriso treats overwritable media with a valid ISO 9660 filesystem as appendable media. To make then writable from scratch, apply