This is a known issue in Pro Tools HD & LE 7.4.2 & 8 (Mac OS X PPC).
Workaround: Format the drive with Apple Partition Map partition scheme.
This little problem slipped in with the introduction of Intel Macs and Mac OS 10.4.6 when GUID Partition Table support was introduced. The default mode when formatting drives now on Intel Macs is GUID Partition Table. If you put this drive onto a Power PC Mac like a G4 or G5 then you are likely to get 9131 errors in Pro Tools.
You can check if your drive is partitioned with a GUID Partition Table using Disk Utility.
If you select the higher level icon in the drive list in Disk Utility, in the bottom section it will show what partition map has been used.
Any drive formatted on an Intel Mac will use a GUID Partition Table. You will need to use the Options menu in the Partition tab to force Disk Utility to select Apple Partition Map.
Alternatively just format the drive on a Power PC Mac and it will be formatted with an Apple Partition Map.
If you have an incorrectly formatted drive you will need to move all the material off it to reformat it with the correct partition map.
It is in the Pro Tools documentation but it has caught me out!
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Mike is Pro Tools genius and an award winning ‘audiomeister’, defined as ‘a person of great skill and authority in sound’. His vast array of credits include music (from classical to rock), drama and documentaries across all the BBC Radio networks, as well as audio post production for video and TV, ‘new media’, live sound, commercial CDs, DVDs and podcasts, helping clients tell their stories with sound. He has been described as "an oasis of calm in a stormy creative world"; "quick, creative & easy to work with"; "always going the extra mile"; and "invests himself in the success of your project"’.
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Seven radio producers – all based in the north of England – have joined forces to launch a new co-operative venture – ‘Radio Wizards’. It’s equally remarkable that their aim now is to work together on every kind of sound production... except radio!
"It’s taken over a year to get to this point," says ‘wizard’ Mike Thornton, "but now we’ve got a viable business plan, we’ve launched our website and we’re already starting to attract commissions. As a facilities provider we decided to facilitate this partnership and set them up with a web site to help kickstart this excellent partnership."
