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Mentioned success and failure reports of partition offset

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This commit is contained in:
Thomas Schmitt 2011-04-19 09:10:02 +00:00
parent 2ffae83ef6
commit be08aa8b5c
2 changed files with 27 additions and 3 deletions
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14
doc/faq.wiki
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@ -22,6 +22,8 @@ Imaging:
[#partition_offset What is partition offset feature all about?]
[#partition_offset_apple Partition offset bad on Apple ?]
Development:
[#api_specs Where are the APIs of libburnia libraries described ?]
@ -130,6 +132,18 @@ where it eventually can manipulate and augment the MBR.
(See [http://libburnia-project.org/wiki/PartitionOffset Partition Offset Wiki]
for examples.)
There are reports of machines which will not boot from USB stick if
partition offset is 0.
===== Partition offset bad on Apple ? ===== #partition_offset_apple
Apple's "Snow Leopard" operating system refuses to mount Debian CD images
with non-zero partition offset.
The issue is still under investigation. But for now one has to choose
between mountability on Apple "Snow Leopard" or bootability from USB stick
on Kontron CG2100 "carrier grade server".
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'''Developing'''
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16
doc/partition_offset.wiki
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@ -25,6 +25,16 @@ and [http://cdimage.debian.org/cdimage/weekly-builds/ weekly] builds make
use of this feature with their bootable ISO images for i386 and amd64. E.g.
[http://cdimage.debian.org/cdimage/daily-builds/daily/current/i386/iso-cd/debian-testing-i386-businesscard.iso debian-testing-i386-businesscard.iso].
According to a
[http://syslinux.zytor.com/archives/2011-March/016201.html thread of march 2011]
on Syslinux mailing list this enabled booting of a Kontron CG2100 server
from USB stick, which otherwise failed.
Regrettably the feature seems to prevent mounting of ISO 9660 images on
Apple "Snow Leopard" systems.
At least this is the outcome of a
[http://lists.debian.org/debian-cd/2011/04/msg00029.html debian-cd thread of april 2011].
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Example:
@ -149,7 +159,7 @@ about 50 kB.
Unpadded ISO images are safe except for burning on CD in TAO mode.
In this case problems may occur with reading the last few data blocks.
So when burning onto CD make sure to require SAO mode and/or to
require padding by 300 KiB.
require padding by 300 kB.
Burning on DVD or BD needs no such caution. Neither does copying
on USB stick or hard disk.
@ -158,8 +168,8 @@ This can be silenced by adding option
{{{
-partition_cyl_align on
}}}
at the cost of image padding up to the next full MiB.
E.g. by 402 KiB to 2 MiB.
at the cost of image padding up to the next full MB.
E.g. by 402 kB to 2 MB.
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