"No entry" sign on grey screen at boot
in [UK Mac]
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From: Ian Piper on 23 Apr 2010 07:51 Hi all, I have a weird problem with my MBP today. It was showing some problems with starting up MAMP, so I decided to reboot. On startup I got the grey screen with a dark grey no entry sign (circle with a diagonal line through it) and it went no further. I could start it up in safe mode, though it took longer obviously. It even started MAMP OK once booted, which knocked on the head my initial theory about that being the cause. Has anyone come across something similar? Given that it starts in safe mode but not in normal mode, is there anywhere obvious that I could look for the source of the problem? I've recently updated to 10.6.3 and installed the latest security update. Ian. --
From: Jaimie Vandenbergh on 23 Apr 2010 08:31 On Fri, 23 Apr 2010 04:51:47 -0700 (PDT), Ian Piper <ianpiper(a)gmail.com> wrote: >Hi all, > >I have a weird problem with my MBP today. It was showing some problems >with starting up MAMP, so I decided to reboot. On startup I got the >grey screen with a dark grey no entry sign (circle with a diagonal >line through it) and it went no further. I could start it up in safe >mode, though it took longer obviously. It even started MAMP OK once >booted, which knocked on the head my initial theory about that being >the cause. > >Has anyone come across something similar? Given that it starts in safe >mode but not in normal mode, is there anywhere obvious that I could >look for the source of the problem? > >I've recently updated to 10.6.3 and installed the latest security >update. Usually indicative of not being able to start the boot process from anything. Might be a sign of incipient HD failure, so make sure your backups are up to date right now. Might just be an odd effect with the EFI not being able to find your boot partition. Then reboot to the install DVD (or a spare bootable disk) and run Disk Utility and repair the boot disk. This might fix it if it's just a partition format fault. It won't be MAMP, but it might be a problem tickled by the 10.6.3 update - is this the first reboot since then? Cheers - Jaimie -- None of this will matter in 20 billion years.
From: Ian Piper on 23 Apr 2010 10:08 On Apr 23, 1:31 pm, Jaimie Vandenbergh <jai...(a)sometimes.sessile.org> wrote: > Usually indicative of not being able to start the boot process from > anything. Might be a sign of incipient HD failure, so make sure your > backups are up to date right now. Might just be an odd effect with the > EFI not being able to find your boot partition. > > Then reboot to the install DVD (or a spare bootable disk) and run Disk > Utility and repair the boot disk. This might fix it if it's just a > partition format fault. > > It won't be MAMP, but it might be a problem tickled by the 10.6.3 > update - is this the first reboot since then? I wondered about whether this meant a looming disk problem. Irritating since I had to replace a disk on my wife's iMac just a few weeks ago (though in that case I saw a flashing folder/question mark icon - in all my Mac years I have never seen a no entry icon!). I have another partition on that disk so I set that as the boot partition, started up fine and ran Disk Warrior against the non- booting partition. It found a few directory problems but the SMART status was fine and there were no permissions or other problems. I accepted the directory fixes, restarted on that partition and it still says "no entry". It feels to me as though this is a minor driver or other incompatibility, but I'm not sure how to check that - could there be odd startup items that are disabled in safe boot? That might explain why it boots one way but not the other. Is there a technical explanation somewhere that sets out exactly what safe boot does? I have checked the Apple KB but could find no details, alas. However the machine is still in warranty, so if I can't resolve this I'll be on the blower to Apple. I do have TM backups up to this morning, so it won't be a total disaster if the disk dies. Ian. --
From: Jaimie Vandenbergh on 23 Apr 2010 10:21 On Fri, 23 Apr 2010 07:08:59 -0700 (PDT), Ian Piper <ianpiper(a)gmail.com> wrote: >On Apr 23, 1:31�pm, Jaimie Vandenbergh <jai...(a)sometimes.sessile.org> >wrote: > >> Usually indicative of not being able to start the boot process from >> anything. Might be a sign of incipient HD failure, so make sure your >> backups are up to date right now. Might just be an odd effect with the >> EFI not being able to find your boot partition. >> >> Then reboot to the install DVD (or a spare bootable disk) and run Disk >> Utility and repair the boot disk. This might fix it if it's just a >> partition format fault. >> >> It won't be MAMP, but it might be a problem tickled by the 10.6.3 >> update - is this the first reboot since then? > >I wondered about whether this meant a looming disk problem. Irritating >since I had to replace a disk on my wife's iMac just a few weeks ago >(though in that case I saw a flashing folder/question mark icon - in >all my Mac years I have never seen a no entry icon!). > >I have another partition on that disk so I set that as the boot >partition, started up fine and ran Disk Warrior against the non- >booting partition. It found a few directory problems but the SMART >status was fine and there were no permissions or other problems. I >accepted the directory fixes, restarted on that partition and it still >says "no entry". It feels to me as though this is a minor driver or >other incompatibility, Maybe the 10.6.3 update didn't apply fully? Boot up on your other partition and apply the combo update to the dubious one. The other thing is that it may be a partition table error, and to use Disk Utility to check for that I think you need to boot off an entirely different device rather than another partition on the same disk. The install DVD, for example. Cheers - Jaimie -- 207 BC: Chrysippus, Greek stoic philosopher, is believed to have died of laughter after watching his drunken donkey attempt to eat figs.
From: Rowland McDonnell on 23 Apr 2010 13:39 Ian Piper <ianpiper(a)gmail.com> wrote: > Hi all, > > I have a weird problem with my MBP today. It was showing some problems > with starting up MAMP, so I decided to reboot. On startup I got the > grey screen with a dark grey no entry sign (circle with a diagonal > line through it) and it went no further. I could start it up in safe > mode, though it took longer obviously. It even started MAMP OK once > booted, which knocked on the head my initial theory about that being > the cause. > > Has anyone come across something similar? Given that it starts in safe > mode but not in normal mode, is there anywhere obvious that I could > look for the source of the problem? > > I've recently updated to 10.6.3 and installed the latest security > update. Updates can cause booting problems. Things get screwed up. Hell, I've found that re-booting has caused me reliability problems that have persisted until I've run various maintenance jobs. Others have said sensible thigns on the subject. My thoughts are: I'd suspect the software update first, and then I'd worry that maybe it was a hardware failure if it happened again without the coincidence of just after a software update. Anyway, I had iffiness after installing 10.6.3 (not big iffiness) and rather more iffiness after installing the recent ARA update. So I ran Onyx, checked the HD volume structures with it, ditto permissions, it fixed a lot of duff permissions, checked prefs (no trouble), flushed caches, re-booted a couple of times before logging on, problems all gone. Strangeness: one problem that turned up after installing the ARA update was trouble mounting disc images. This problem vanished after the above maintenance jobs. I've seen that problem before and it's gone away the same way before - dunno what caused it. -- Remove the animal for email address: rowland.mcdonnell(a)dog.physics.org Sorry - the spam got to me http://www.mag-uk.org http://www.bmf.co.uk UK biker? Join MAG and the BMF and stop the Eurocrats banning biking
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