Hi,
I have 4-year-old 24" iMac (2.4 GHz, 4-gb RAM, model A1225, part number
MA878LL/A) which was running 10.6.8 (Snow Leopard).
It had been hanging a lot in the past day or two, so I backed up the user files
and decided it might be a good time to upgrade to Lion, so I attempted a fresh
install (of 10.7.1). At the beginning of the install, I used disk utility to
repair the disk and it failed. I did not copy down the messages, but I think
one was "invalid sibling link". I was hoping this might be a software problem,
but now I'm thinking it's a hardware problem.
It seemed like 10.7.1 installed OK, so I ran software update and found 4
updates (10.7.2, iTunes, a firmware update, and something else). The files
were downloaded and the system rebooted, but then it hung. After 30 minutes, I
powered off and then back on. Within a minute or two, it appeared to be doing
the firmware update, since it showed the horizontal grey bar. The progress bar
did not get far before it froze again. I tried this several times and got the
same results.
I tried to boot from another drive (cmd-opt), but it did not give me that
option before hanging. I then booted in verbose mode (cmd-v). A bunch of
stuff flew by and then it hung. Here is what was repeated many times, which I
copied from the last screen:
hfs_swap_BTNode: record #-1 invalid offset (0x0000)
hfs: node=14271 fileID=4 volume=MacHD device=dev/disk0s2
0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [ErrType FS]
[MountPt /]
hfs: Runtime corruption detected MacHD, fsck will be forced on next mount.
After those 3 lines were repeated a lot, the final 3 lines were:
DNSServiceRegister ("fbb"): -65563
DNSServiceRegister ("fbb"): -65563
launch_msg(): Socket is not connected
Can anyone interpret this for me? Is it likely a bad hard drive, or might it
be some other hardware problem? Is there anything I can try that might help
fix or diagnose the problem?
If nothing else works, I have to decide whether to get a new computer or pay to
have this one fixed. I have an extra hard drive, so if it's likely just a bad
hard drive, it would be worth it to me to simply replace the drive. On the
other hand, if I likely messed up other stuff (since I may have interrupted the
firmware update), it might be better to simply cut my losses and buy a new mac.
I would really appreciate whatever help and advice you can offer. Thanks,
Gregg
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