Partition missing after 10.5.6 upgrade

[xmods]

ok i had kalyway 10.5.2 install and i followed this link for the install

 

http://www.insanelymac.com/forum/index.php...p;#entry1004971

 

everything was fine i had the generic usb fail to load fixed that by install usb fix 2.0.

 

but my hard drive is showing 1/2 it's actual size and a partition is missing, it what's the partition when booting were u enter the -v

 

no showing the partition in disk utilites at all and showing the had drive as on partition instead of 2 been searching for couple hrs to try and find something but keep comming up empty handed

[srs5694]

I've no immediate solution, but I do have a question and a suggestion:

 

First, the question: Does your system use MBR (DOS/BIOS-style) partitions or GPT (aka GUID) partitions? The choice of partitioning system can have significant effects on what sorts of problems can crop up. For instance, it's possible for logical partitions on an MBR system to disappear if a link to an earlier logical partition (or the extended partition entry) gets damaged. This could explain part of what happened to you, although it doesn't neatly explain why your disk size appears to have halved. If you happen to be using a GPT disk, it's got backup copies of its partition tables that might help with recovery. (Apple's Disk Utility seems pretty weak on this score in my limited experience, but there are other tools available.)

 

Second, the suggestion: Try examining the disk's partition table with something other than Disk Utility. Mac OS comes with programs called fdisk and gpt (for MBR and GPT partitions, respectively), and there are other tools in other OSes. Details of what you can do vary from one tool to another, so I can't be very specific. I recommend you check to verify the disk's size and determine whether the missing partition is really missing or if it's simply become invisible because of a change to its type code or some other problem. Some tools offer recovery options. GNU Parted can search for and recover lost partitions, for instance (although I feel compelled to mention that this feature has never worked for me). If you know the exact size of a missing partition you may be able to recreate it with some of the "dumber" tools. I do advise caution when messing around with such low-level tools, though; a mistake could make a bad situation worse. Before proceeding, back up your partition table. For MBR disks, do this from the command line:

 

sudo dd if=/dev/disk0 of=/some/backup/location/disk0.mbr bs=512 count=1

 

This backs up the MBR to /some/backup/location/disk0.mbr, which should probably be on a removable disk. For GPT disks, change "count=1" to "count=34". With a backup in place, you can recover your partition table if things go from bad to worse.