What happens when you do a clean install

Hi i'm looking to upgrade my macbook, currently running on OS X Tiger, to Lion. I understand that i will have to do this either via a thumb drive, or through snow leopard then Lion. I am just wondering how will be best to go about upgrading. I would like to do clean install but not sure how to do it and exactly what the benifit is for doing so. Also i'm looking to do it on the cheap by buying the snow leopard disc on ebay, is there anything i should be looking out for from buying secondhand?
Cheers P

The benefit of a clean install is a better and more reliable system. I highly recommend it. The basic process is:
Drive Preparation
1. Boot from your Lion installer. Select Disk Utility from the main menu and click on the Continue button.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID (for Intel Macs) or APM (for PPC Macs) then click on the OK button. Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
Quit DU after formatting has completed and return to the main menu. Select Reinstall OS X Lion and click on the Install button. Select the drive you just erased as the destination.

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Från: Neo Rye [email protected]
Skickat: den 28 november 2012 06:44
Till: Lennart Risfelt
Ämne: what happens when you get a "PermGen space null" error?
Re: what happens when you get a "PermGen space null" error?
created by Neo Rye<http://forums.adobe.com/people/Neo+Rye> in ColdFusion - View the full discussion<http://forums.adobe.com/message/4879436#4879436

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Sorry no but here is some info anyway,
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Från: Neo Rye [email protected]
Skickat: den 28 november 2012 06:44
Till: Lennart Risfelt
Ämne: what happens when you get a "PermGen space null" error?
Re: what happens when you get a "PermGen space null" error?
created by Neo Rye<http://forums.adobe.com/people/Neo+Rye> in ColdFusion - View the full discussion<http://forums.adobe.com/message/4879436#4879436

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What happens when you do a clean install

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