white/pink noise on playback of new tracks or punch ins

[fringelocal]

I have a situation where all of a sudden any new track or overdub will record fine but on playback it's just all digital white/pink noise. However, if I copy the audio tracks and create a new session on a different hard drive, it works fine.
It will be a drag to do this for every session I've got on-going. I tried the same process on the original drive and I still get the noise. I did a "disk verify" and the drive seems fine. I still can't determine what's causing this. I'm using PT9 HD. with 2 cards and 3 192's. Any suggestions?

Interestingly, the existing tracks play back fine, it's only when something new is added, whether it's a punch-in or a new track.

Also I did the above fix about a week ago on one song and it worked fine until now where it's happening all on projects on that hard drive.

[albee1952]

Details on the computer? The recording drive?

[fringelocal]

thanks for responding. here is the computer deets:
Model Name: Mac Pro
Model Identifier: MacPro5,1
Processor Name: 6-Core Intel Xeon
Processor Speed: 3.33 GHz
Number Of Processors: 2
Total Number Of Cores: 12
L2 Cache (per core): 256 KB
L3 Cache (per processor): 12 MB
Memory: 48 GB
Processor Interconnect Speed: 6.4 GT/s
Boot ROM Version: MP51.007F.B03
SMC Version (system): 1.39f11
SMC Version (processor tray): 1.39f11
Serial Number (system): C07L60G1F4MH
Serial Number (processor tray): J512700QVBH8C

this is the hard drive


ST3000DM001-1CH166:

Capacity: 3 TB (3,000,592,982,016 bytes)
Model: ST3000DM001-1CH166
Revision: CC26
Serial Number: Z1F2P0JX
Native Command Queuing: Yes
Queue Depth: 32
Removable Media: No
Detachable Drive: No
BSD Name: disk3
Rotational Rate: 7200
Medium Type: Rotational
Bay Name: Bay 3
Partition Map Type: GPT (GUID Partition Table)
S.M.A.R.T. status: Verified
Volumes:
Capacity: 209.7 MB (209,715,200 bytes)
Writable: Yes
BSD Name: disk3s1
3 TB WORK :
Capacity: 3 TB (3,000,249,008,128 bytes)
Available: 2.35 TB (2,351,720,873,984 bytes)
Writable: Yes
File System: Journaled HFS+
BSD Name: disk3s2
Mount Point: /Volumes/3 TB WORK