On 03/15/2010 10:25 PM, Sven-Hendrik Haase wrote:
On 15.03.2010 16:41, Gerardo Exequiel Pozzi wrote:
Hello,
There is another issue with offset 1. This does not happen with offset 0.
My scenario: * 2G USB key * isohybrid -offset 1 * another primary partition created (also is the same issue happens with a logical part instead)
# mount /dev/sdc2 /home/hola mount: /dev/sdc2 already mounted or /home/hola busy
** strace shows: mount("/dev/sdc2", "/home/hola/", "ext2", MS_MGC_VAL, NULL) = -1 EBUSY (Device or resource busy)
# mkfs.ext2 /dev/sdc2 mke2fs 1.41.10 (10-Feb-2009) /dev/sdc2 is apparently in use by the system; will not make a filesystem here!
** strace shows: open("/dev/sdc2", O_RDONLY|O_EXCL) = -1 EBUSY (Device or resource busy)
My conclusion is, isohybrid mode is a great hack!. But of course, carries some inevitable issues.
The big dichotomy: * offset 1: + allows some partitions programs works without issues. (at least I know about parted issue) - Can not use extra partitions created in the medium. - Can not use /dev/disk/by-label/ skip archiso_early.
* offset 0: - Cause issues with some partitions programs. + Can use extra partitions. + Can use "by-label" (under condition that all partitions must have a LABEL)
Good luck!
Ok, so let's use the upstream recommended offset 0 for now as well. By the way, I was actually able to use extra partitions and boot from them with offset 1 but my results do not appear to be consistent.
Okey. Note that archboot use the default mode.
They are currently deciding on a more proper way for isohybrid on the syslinux mailing list to work while being integrated in the iso generation process itself so as not to be a hack anymore. Until then, we'll have to think about something ourselves.
Good.
So use offset 0 instead of 1 for now?
Yes. I agree. I will push the patch that removes archiso_early on my git branch to be merged in master ;) Thanks for the feedback. -- Gerardo Exequiel Pozzi ( djgera ) http://www.djgera.com.ar KeyID: 0x1B8C330D Key fingerprint = 0CAA D5D4 CD85 4434 A219 76ED 39AB 221B 1B8C 330D