They have a capacity of 4.7 GB. But both Windows Explorer and IMGBurn says 1.31 GB of 1.31 GB free. I can read disks fine. I tried with Verbatim and YDD and the result is the same.
Here is the Disc info from Imgburn:
TSSTcorp CDDVDW TS-H653J FU02 (ATA)
Current Profile: DVD-R
Disc Information:
Status: Empty
State of Last Session: Empty
Erasable: No
Free Sectors: 691,136
Free Space: 1,415,446,528 bytes
Free Time: 153:37:11 (MM:SS:FF)
Next Writable Address: 0
MID: MCC 03RG20
Supported Write Speeds: 4x
Pre-recorded Information:
Manufacturer ID: MCC 03RG20
Physical Format Information (Last Recorded):
Book Type: DVD-R
Part Version: 5
Disc Size: 80 mm
Maximum Read Rate: Not Specified
Number of Layers: 1
Track Path: Parallel Track Path (PTP)
Linear Density: 0.267 um/bit
Track Density: 0.74 um/track
First Physical Sector of Data Area: 196,608
Last Physical Sector of Data Area: 0
Last Physical Sector in Layer 0: 0
Performance (Write Speed):
Descriptor 1...
-> B0: 0x00, B1: 0x00, B2: 0x00, B3: 0x00
-> EL: 691135 (0x000A8BBF)
-> RS: 8,310 KB/s (6x) - WS: 5,540 KB/s (4x)
And what happens when I try to burn a dvd with 4 GB of data.
12:34:28 #28 Text 0 File DVDR.cpp, Line 3437
Reserved Track size: 2117344 (204EE0h, 4135MB) -> return code -1066
12:34:28 #29 CDR -1066 File ThreadedTransferInterface.cpp, Line 1921
Invalid field in command
E: TSSTcorp CDDVDW TS-H653J
12:34:28 #30 TRANSFER -27 File ThreadedTransfer.cpp, Line 1235
Could not perform start of Disc-at-once
12:34:28 #31 Text 0 File DVDPlusDualLayer.cpp, Line 1464
SetDriveCaps: Set LAST LBA of layer 1 to 0
12:34:28 #32 Text 0 File ThreadedTransfer.cpp, Line 275
Pipe memory size 83836800
12:34:28 #33 PHASE 38 File dlgbrnst.cpp, Line 2143
Burn process failed at 4x (5,540 KB/s)
12:34:28 #34 Text 0 File SCSIPTICommands.cpp, Line 454
SPTIDismountVolume - completed successfully for FSCTL_DISMOUNT_VOLUME
12:34:28 #35 Text 0 File Cdrdrv.cpp, Line 12325
DriveLocker: UnLockVolume completed
12:34:28 #36 Text 0 File SCSIPTICommands.cpp, Line 617
UnLockMCN - completed sucessfully for IOCTL_STORAGE_MCN_CONTROL