Double Layer DVD or not?

right, that is what I thought...it should have it. but according to system profiler, it does not. also looks like I have 0 cache, whereas others don't.

here is the full detail:

MATSHITA DVD-R UJ-846:

Firmware Revision: FB2U
Interconnect: ATAPI
Burn Support: Yes (Apple Shipped/Supported)
Cache: 0 KB
Reads DVD: Yes
CD-Write: -R, -RW
DVD-Write: -R, -RW
Burn Underrun Protection CD: Yes
Burn Underrun Protection DVD: Yes
Write Strategies: CD-TAO, CD-SAO, DVD-DAO
Media: No





Any suggestions of how to get this issue resolved?

Spoke to Apple on the phone. She suggested I zap the PRam, which we both thought would have no effect, but after doing so, system profiler now shows 2048KB of cache and +R, +RW, and +R DL DVD writing support!

Seems odd to me.

I did run into a few snags thought. After zapping the PRAM, I got a crash on startup. It said hold the power button to restart. Which I did. It stated up ok. THen I decided to restart one more time and the same thing happened again.

Below is the report. Any thoughts on what is going on?


panic(cpu 0 caller 0x0019CAEF): Unresolved kernel trap (CPU 0, Type 14=page fault), registers:
CR0: 0x80010033, CR2: 0x00000000, CR3: 0x00d10000, CR4: 0x000006e0
EAX: 0x00000000, EBX: 0x498905fe, ECX: 0x00000000, EDX: 0x0000000e
ESP: 0x00000000, EBP: 0x24f7ba98, ESI: 0x03b42400, EDI: 0x80000000
EFL: 0x00010202, EIP: 0x00000000, CS: 0x00000008, DS: 0x00000010

Backtrace, Format - Frame : Return Address (4 potential args on stack)
0x24f7b904 : 0x128b5e (0x3bbeb8 0x24f7b928 0x131bbc 0x0)
0x24f7b944 : 0x19caef (0x3c1340 0x0 0xe 0x3c10f8)
0x24f7b9f4 : 0x197b53 (0x24f7ba08 0x24f7ba98 0x0 0x24f70048)
0x24f7ba00 : 0x0 (0x24f70048 0x120010 0x16d0010 0x10)
0x24f7ba98 : 0x5217d9 (0x3b42400 0xe 0x0 0xffff)
0x24f7bb08 : 0x51b3b7 (0x3b42400 0x3748300 0x0 0x373ef8)
0x24f7bb28 : 0x37bfee (0x3748300 0xe0000100 0x3b42400 0x1)
0x24f7bb68 : 0x37ccd9 (0x3b42400 0xe0000100 0x3748300 0x1)
0x24f7bb98 : 0x37cc34 (0x3b42400 0x36d8800 0x1 0x0)
0x24f7bbd8 : 0x51f790 (0x3b42400 0x36d8800 0x1 0x0)
0x24f7bbf8 : 0x521010 (0x3b42400 0x36d8800 0x1 0x0)
0x24f7bc28 : 0x520f60 (0x3b42400 0x3b42400 0x1 0x5207d4)
0x24f7bc58 : 0x52a8ce (0x3b42400 0x36d8800 0x1 0x0)
0x24f7bca8 : 0x52aadb (0x36d8800 0x3b42400 0x24f7bcd8 0x3aeea4)
0x24f7bcd8 : 0x52e3b1 (0x36d8800 0x3cc3c50 0x24f7bcf8 0x38c777)
0x24f7bcf8 : 0x38e108 (0x36d8800 0x1 0x0 0x0) Backtrace continues...
Kernel loadable modules in backtrace (with dependencies):
com.apple.iokit.IOHIDFamily(1.4.7)@0x515000

Kernel version:
Darwin Kernel Version 8.6.1: Tue Mar 7 16:55:45 PST 2006; root:xnu-792.9.22.obj~1/RELEASE_I386

Model: iMac4,1, BootROM IM41.0055.B02, 2 processors, Intel Core Duo, 2 GHz, 2 GB
Graphics: ATI Radeon X1600, ATY,RadeonX1600, PCIe, 128 MB
Memory Module: DIMM0/BANK 0, 1 GB, DDR2 SDRAM, 667 MHz
Memory Module: DIMM1/BANK 1, 1 GB, DDR2 SDRAM, 667 MHz
AirPort: spairport wireless_card_type_airportextreme (0x14E4, 0x89), 103.2 (3.120.28.3)
Bluetooth: Version 1.7.3f4, 2 service, 1 devices, 1 incoming serial ports
Network Service: Built-in Ethernet, Ethernet, en0
Network Service: Parallels Host-Guest Adapter, Ethernet, en2
Serial ATA Device: WDC WD2500JS-40NGB2, 232.89 GB
Parallel ATA Device: MATSHITADVD-R UJ-846
USB Device: Built-in iSight, Micron, Up to 480 Mb/sec, 500 mA
USB Device: deskjet 3600, hp, Up to 12 Mb/sec, 500 mA
USB Device: PS2 to USB Converter, CHESEN, Up to 1.5 Mb/sec, 500 mA
USB Device: Bluetooth HCI, Up to 12 Mb/sec, 500 mA
USB Device: IR Receiver, Apple Computer, Inc., Up to 12 Mb/sec, 500 mA