Keychains, disc utility and hardware test

(this might well be moved to a new topic)
I had three certificates in an old keychain on my 11inch mid 2011 MBA, no idea what they were or what they were for but one had expired (it was dated 20 June 2012 - when I bought my machine - so had probably expired in a year), one was valid and one was not trusted. Maybe a bit of a silly question to ask given I don't know what they were for but would they have been critical to running my machine? (it's working fine right now so probably not)
What is the meaning of the following keychain items/what do they do:
accounts.google.com
Apple Persistent State Encryption
Chrome Safe Storage
com.apple.ubiquity.peer-uuid.0A060ABD-5720-4425-A778-32F5C693DE8B
daw.apple.com
id.apple.com
Apple Code Signing Certification Authority
com.apple.kerberos.kdc
com.apple.systemdefault
Software Signing
Do Disc Utility and/or Hardware Test ALWAYS show up anomalies in hardware/software, or is there more than meets the eye in some cases?
Any help and advice appreciated - thanks!

tragicallyhip:
My previous response will check for software filesystem/directory errors on our HDD. In re-reading your post, you may have a hardware issue. If you are able, boot from the Apple Hardware Test disk that came with your computer, and run the extended tests in a loop by holding down Ctrl + L during the tests. Let it run for a while, several hours if necessary.
cornelius

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Hi
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Crap! i ran disc utility and it killed 20 GB!

as i do every month, i ran my usual disc utilities today...these include disc warrior and booting from the mac os x install disc. as i do every month, i ran disc repair, then erase free space. when i was finishing erase free space, my computer bombed (it showed a dark black screen and said hold down the power key to restart, i assume the equivalent of a system bomb in 9) and i did. when it booted back up, i was at about 1.2 GB, so my computer took forever to boot. When i started, i had 23 GB! what happened, anyone know?
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Ben,
The concept of using tools for monthly maintenance is an old one. The only type of maintenance you want to do is backup, and then specific maintenance used to make sure updates you install won't go awry. By using a maintenance tool when nothing was actually wrong, you probably created a problem where none existed before. This is why it is vitally important you backup before you do any sort of maintenance. For more on the kinds of things you want to do when you upgrade, see my FAQ:
http://www.macmaps.com/upgradefaq.html
For more on a variety of backup options see:
http://www.macmaps.com/backup.html
I rarely do any other type of "maintenance" except if I need to troubleshoot a problem my system is having.
Disclaimer: Reference to links I make to my Macmaps.com website are a for your information only type reference. I do not get any profit from this page, and it is open to the public.

My Macbookpro will not start up. At first it was showing a gray screen with a flashing folder and question mark. I went through the steps to repair with disc utility and this did not work. How do I back up my data, without time machine activated?

I need to back up my files and date before erasing my drive, but my time machine backup is not coming up. How do I access my hard drive to back up my files?

A erase of the drive or boot partition is not always necessary.
Flashing question mark at boot could be a easy fix, sometimes it's the firmware that simply forgot what bootable volume to boot from.
Try holding the Option key down while booting the machine, a choice of bootable options appears, select your OS X and boot up.
When you get in, head to System Preferences > Startup disk and set it again new. This will tell the firmware what to boot from. Test it to see.
Now if you don't have a selection of bootable options, it could be that the drive is dead, or OS X is erased or corrupted so it can't boot.
You'll have to run through this list of fixes to see what's going on, if you need a hardware fix or what, I've also included links if you can't fix it and need to recover your data etc.
(If it's not remmebering your boot selection then also run through the list to reset things.)
Step by Step to fix your Mac

I accidentally removed an etra internal HD from the Disc utility and hense the desktop. How do I get it back?

I had been getting a window on my desktop on boot up referring to a disc. It gave the choice to ignore, eject or initialise. When I initialise it takes me to the Disk Utility. I though I had found it and removed it but then noticed that it was my spare internal HD as the icon disappeared from the desktop.
How do I get it back as I now have no access to it.
All I can think of is taking it out of its slot and putting it back in and hopefully it will be recognised again.
Cheers
SAS

Thank you for taking the time to reply.
I had tried a Restart but that didn't work.
The 'Mount' was greyed out so couldn't use that.
However, my initial thought to slide the HD out and back in again did work. All back to normal.
It also stopped the warning window which appeared on start up. That's gone too.
One thing this problem has instigated was to give the internal areas of the tower a good hoover out. It was well overdue a clean so some good came out of my 'accident'.
Many thanks
Cheers
SAS

Disc Utility and Repairing Disk

First off: What is the difference between repairing permissions and repairing the disk? I assume permissions has to deal with key chains and repairing the disk?
Anyway... I got an error message when trying to verify my Master HD. This is what the log said:
Verifying volume “MY hard drive”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Invalid extent entry
Checking multi-linked files.
Checking Catalog hierarchy.
4 %)
Checking Extended Attributes file.
Checking volume bitmap.
Checking volume information.
Volume Header needs minor repair
ed.",1)
MY hard drive
Error: The underlying task reported failure on exit
1 HFS volume checked
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anyone have any suggestions? Everything has been working pretty normaly. I had started a thread a few weeks ago about my lacie external HD. It hasn't mounted since I installed the latest security update. Someone had suggested repairing permissions with it disconnected and then re-installing the security update, repairing permissions again and then plugging it in again.
i don't know if the two are related or not... but i'm concerned about this latest development.
thanks for any and all help!

The version of Disk Warrior at Amazon you gave a link to is an old version (DW 3.0) for OSX 10.2.1. Unless you really are running that specific version of OSX, I'd look for a version that's closer to your OS version (eg. I assume you're running 10.2.8)
I don't know the version history of DW, so I can't give a specific DW version no., but the current DW 4.0 only runs on Panther or Tiger. Here's the system requirements for DW 4.0.
I'd check out eBay as well to get a version of DW that came out probably about 3 yrs ago (2002-2003) that will handle OSX 10.2.6-10.2.8.
Good luck!
Ed
PB G4 Mac OS X (10.3.9) PM G4 Dual 1.25, PM G4 Dual 867, OSX 10.2.8, OSX Server 10.2.8

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