** Also affects: parted (Ubuntu Jaunty)
Importance: High
Assignee: Colin Watson (cjwatson)
Status: Triaged
** Also affects: ubiquity (Ubuntu Jaunty)
Importance: Undecided
Status: Invalid
--
Partition Table is cleared during install on Intel Macs
https://bugs.launchpad.net/bugs/222126
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Support, which is the registrant for Mactel Support.
Status in grub-installer: Invalid
Status in Mactel Support: Confirmed
Status in “parted” source package in Ubuntu: Triaged
Status in “ubiquity” source package in Ubuntu: Invalid
Status in parted in Ubuntu Jaunty: Triaged
Status in ubiquity in Ubuntu Jaunty: Invalid
Bug description:
Binary package hint: ubiquity
Ubuntu 8.04 Final
Intel Macs have an EFI system and a GPT. The installer seems to handle the GPT
correctly (as it has in the past), but it has recently come up that the
installer is completely emptying the contents of the MBR partition table which
is still required to boot Windows and Ubuntu (GRUB relies on the MBR partition
table). The two tables are not synced automatically.
When users install Hardy, they are suprised to find that the system is
unbootable (the EFI loader cannot "see" the partition as bootable). a tool such
as rEFIt or gptsync can copy the information in the GPT into the MBR table thus
fixing the issue (for most).
This is even more serious for users with other working OS installs in addition
to Ubuntu (such as other linux distros and Windows) since it completely dumps
the information needed to boot these installs as well.
The expected procedure (and how the previous Ubuntu install seems to have
handled it) is to 'update' both the GPT and the MBR table with changes instead
of completely losing the information stored there.
gparted / parted seemed to update both tables properly previously as well.
I will be doing a full install on my iMac later and will be able to add
additional information.
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