Hi.. new member here – been a (trouble free) MacBook user now since 2006, but on Sunday I encountered a problem.
I had selected a number of photos for “Export”, in iPhoto, clicked “Export” from the drop down menu… the Mac hard disk made no unusual noises, but revved up quite a bit and then the machine switched off. I realised a t this point that I was running off battery power – the AC was connected but I had turned the power off.
I switched on AC and let the battery recharge for a while, then tried to boot up the Mac. It made the normal ‘start-up’ sound – the grey Apple screen appeared and the activity indicator was spinning. Then – after 80 seconds – the machine turned itself off.
I checked power – all ok.
Repeated the start up…the same result.
Then I searched the Apple Support website and the Mac Forum for start up hints… and ran thru the “basic OSX troubleshooting” steps, from this forum.
Tried to reset the PRAM: I let it chime three times, but the same end result occurred.
I then loaded the install DVD and went into Disk Utility. I highlighted the main drive, to repair disk permissions, but these options were greyed out for the HDD.
So I tried to repair the disk… the progress indicator got to about 40% then it threw out the message:
Incorrect Block count for file Thumbs32Segment.data
(should be 3058 instead of 3016)
Invalid Sibling link
I then tried using fsck in single user mode… it runs thru various checks and fails to repair the mounted disk as it has been set to “READ only” – is this a result of the “Block size” problem, or a separate issue?
I have searched the forum for the terms “incorrect block count” and for “Thumbs32Segment” – no topics found…
What should I try next?
Any ideas or links gratefully received…. Thanks in advance
I had selected a number of photos for “Export”, in iPhoto, clicked “Export” from the drop down menu… the Mac hard disk made no unusual noises, but revved up quite a bit and then the machine switched off. I realised a t this point that I was running off battery power – the AC was connected but I had turned the power off.
I switched on AC and let the battery recharge for a while, then tried to boot up the Mac. It made the normal ‘start-up’ sound – the grey Apple screen appeared and the activity indicator was spinning. Then – after 80 seconds – the machine turned itself off.
I checked power – all ok.
Repeated the start up…the same result.
Then I searched the Apple Support website and the Mac Forum for start up hints… and ran thru the “basic OSX troubleshooting” steps, from this forum.
Tried to reset the PRAM: I let it chime three times, but the same end result occurred.
I then loaded the install DVD and went into Disk Utility. I highlighted the main drive, to repair disk permissions, but these options were greyed out for the HDD.
So I tried to repair the disk… the progress indicator got to about 40% then it threw out the message:
Incorrect Block count for file Thumbs32Segment.data
(should be 3058 instead of 3016)
Invalid Sibling link
I then tried using fsck in single user mode… it runs thru various checks and fails to repair the mounted disk as it has been set to “READ only” – is this a result of the “Block size” problem, or a separate issue?
I have searched the forum for the terms “incorrect block count” and for “Thumbs32Segment” – no topics found…
What should I try next?
Any ideas or links gratefully received…. Thanks in advance