mac won't start

[saeedku]

Hi guys,I really suffred a lot with my iMac and it's HD, always have a problems with the directories and permissions, usually I format or use time machine, today I just restart my iMac and it's won't start, it shows apple logo and nothing more.
I tried to boot in safe mode but it did not work, then I tried single user mode and it stack also.
I don't know what to do now and why this happen to me so frequintly

[Magnus]

Originally Posted by saeedku

Hi guys,I really suffred a lot with my iMac and it's HD, always have a problems with the directories and permissions, usually I format or use time machine, today I just restart my iMac and it's won't start, it shows apple logo and nothing more.
I tried to boot in safe mode but it did not work, then I tried single user mode and it stack also.
I don't know what to do now and why this happen to me so frequintly

You could just have a lemon. Did you just buy it? Is it under warranty? If so, take it back to the shop.

Did you try booting from OS DVD?

[fangpyre]

Maybe you messed something up.
I can see you've been going into permissions and the sort.

[saeedku]

Thank you Magnus and fangpyre for your reply, I never thought that this problems because of hardware, anyhow I booted from OS DVD and tried to repair the HD with no luck, anyhow I've restored the system using Time Machine, following is the output of the terminal:

-bash-3.2# df
Filesystem 512-blocks Used Available Capacity Mounted on
/dev/disk1s3 14911928 14904880 0 100% /
devfs 224 224 0 100% /dev
fdesc 2 2 0 100% /dev
/dev/disk3 934 22 866 3% /Volumes
/dev/disk4 934 124 764 14% /private/var/tmp
/dev/disk5 190 22 160 13% /private/var/run
/dev/disk6 190 4 178 3% /Library/Preferences
/dev/disk2s1 524550144 120722432 403827712 24% /Volumes/TimeMachine
/dev/disk2s2 356428736 15868480 340560256 5% /Volumes/SHARED
/dev/disk2s3 95707080 78465128 17241952 82% /Volumes/MacBackup
/dev/disk0s3 66459928 53465480 12994448 81% /Volumes/Vista
/dev/disk0s2 421265408 135519096 285746312 33% /Volumes/McintoshHD

-bash-3.2# umount /dev/disk0s2
-bash-3.2# fsck_hfs -r /dev/disk0s2
** /dev/rdisk0s2
** Checking Journaled HFS Plus volume.
** Checking Extents Overflow file.
** Checking Catalog file.
** Rebuilding Catalog B-tree.
Invalid node structure
(4, 13310)
** The volume McintoshHD could not be repaired.

-bash-3.2# fsck_hfs -f /dev/disk0s2
** /dev/rdisk0s2
** Checking Journaled HFS Plus volume.
** Checking Extents Overflow file.
** Checking Catalog file.
Invalid sibling link
(4, 14219)
** Volume check failed.
-bash-3.2#

The issue still is why I'm getting all this problems with the directories and permissions, I believe that I faced all kind of HD problems, I checked the permissions few days ago and everything was ok, I just restart the computer today and got all this problems.


by the way, each time I tried to post or reply using iPhone the forum ask me to login.

Thanks again

[Magnus]

The log in problem probably has to do with cookies.

Google "Invalid sibling link" and you'll find various suggestions that may help with your hard drive problem.

[maccebu]

Originally Posted by saeedku

** Rebuilding Catalog B-tree.
Invalid node structure
(4, 13310)
** The volume McintoshHD could not be repaired.
Thanks again

It's looks like you have a corrupt directory structure
have you tried running disk warrior on your drive and checking it if there are errors

else if you dont have a disk warrior you can read on how to fix Invalid node structure
macosxhints.com - A DIY solution to an invalid node structure problem