** Description changed: Binary package hint: grub The new grub-install of natty alpha3 now detects and avoids FlexNet- - occupied sector 32, but it seems it somehow mishandles something and + occupied sectors, but it seems it somehow mishandles something and writes code into after sector 63, thus make the ntfs partition that starts there unbootable and unreadable. - I have tested with a memory stick /dev/sdc partitioned like this: - ubuntu@ubuntu:~$ sudo fdisk -lu /dev/sdc - Disk /dev/sdc: 16.2 GB, 16236085248 bytes 255 heads, 63 sectors/track, 1973 cylinders, total 31711104 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00063979 - - Device Boot Start End Blocks Id System + Device Boot Start End Blocks Id System /dev/sdc1 63 25671869 12835903+ 7 HPFS/NTFS /dev/sdc2 25671870 31696244 3012187+ 83 Linux - /dev/sdc1 was not mounted. /dev/sdc2 was mounted on /mnt. - Then I downloaded FlexNet signature at http://forum.ubuntu.com.cn/viewtopic.php?f=49&t=320155&start=30 unzipped flexnet.sector32.zip, and wrote into sector32: - sudo dd if=flexnet.sector32 of=/dev/sdc seek=32 - ran grub-install, it detected and avoided that sector: - ubuntu@ubuntu:~$ sudo grub-install /dev/sdc --root-directory=/mnt /usr/sbin/grub-setup: warn: Sector 32 is already in use by FlexNet; avoiding it. This software may cause boot or other problems in future. Please ask its authors not to store data in the boot track. Installation finished. No error reported. - NTFS partition /dev/sdc1 was now trashed. By design, the last sector of ntfs is a backup of its boot sector, so I copied the last sector of /dev/sdc1 to its first sector and successfully recovered the file system: - ubuntu@ubuntu:~$ sudo dd if=/dev/sdc of=/dev/sdc count=1 seek=63 skip=25671869 - I took a further look at the sectors and found that the first sector of the partition was not the only sector that was overwritten by grub, and was surprised that by recoverying only the first sector the whole file system seemed good. - By removing the FlexNet signature, grub-install never overwrite the NTFS sectors again. ProblemType: Bug DistroRelease: Ubuntu 11.04 Package: grub (not installed) ProcVersionSignature: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6 Uname: Linux 2.6.38-5-generic i686 NonfreeKernelModules: wl Architecture: i386 Date: Sun Mar 6 17:43:14 2011 LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110302) ProcEnviron: - LANGUAGE=en_US:en - LANG=en_US.UTF-8 - SHELL=/bin/bash + LANGUAGE=en_US:en + LANG=en_US.UTF-8 + SHELL=/bin/bash SourcePackage: grub UpgradeStatus: No upgrade log present (probably fresh install)
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/730225 Title: grub-install trashes the ntfs partition that starts at sector 63 if one or more sectors in the embedding area is occupied by Adobe FlexNet -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
