3520 suddenly burning very slow

vbimport

#1

i bought my nec 3520 about 2 months ago and untill about 3 weeks ago thought it was great. now i wanna kill the damn thing.
i burned a dvd with it then, the next day when i went to burn something else off i noticed that the recording speed of the drive would not go over 32x for cds and it refused to read some dvd’s reguardless of the brand.
i took it back to the shop and the nice chap gave me another one, all was good i thought, that was untill i installed it. now this one dont burn cd’s faster then 24x and still wont read some dvd’s. :confused:
i really dont know where to start to try and solve the problem please help.


#2

Sounds like a DMA problem. Check here:

http://club.cdfreaks.com/showthread.php?t=101616


#3

still no change to writing speed


#4

Are you using MS IDE drivers ? If not… this might be the problem.


#5

not to sure. how would i find out? im very rubbish at this sorta thing,


#6

to help us verify please do a tranfer rate and burst rate test in nero cd speed.
please poost the result


#7

Operating System Windows XP
Drive _NEC DVD_RW ND-3520A
Firmware Version 1.UA
Serial Number 52SF864S111
Disc Data CD
MID 203m180s212f
Capacity 73:42.41

Transfer Rate

Start 20.81x
End 46.98x
Average 35.68x
Type CAV

Seek Times

Random 115 ms
1/3 116 ms
Full 206 ms

CPU Usage

1X 1 %
2X 2 %
4X 4 %
8X 7 %

Interface

Burst Rate 18939 KB/sec

Spin Up/Down Times

Spin Up Time 2.04 sec
Spin Down Time 2.62 sec

Load/Eject Times

Load Time 10.11 sec
Eject Time 1.78 sec
Recognition Time 0.00 sec

Log

Time Elapsed Action
[13:29:19] Starting Transfer Rate Test
[13:31:29] 2:10 Speed:21-47 X CAV (35.68 X average)
[13:31:29] Starting Seek Times Test
[13:31:41] Random Seek: 115 ms
[13:31:53] 1/3 Seek: 116 ms
[13:32:14] 0:44 Full Seek: 206 ms
[13:32:14] Starting CPU Usage Test
[13:32:29] CPU usage at 1X: 1 %
[13:32:44] CPU usage at 2X: 2 %
[13:32:59] CPU usage at 4X: 4 %
[13:33:14] 1:01 CPU usage at 8X: 7 %
[13:33:14] Starting Burst Rate Test
[13:33:16] 0:02 Interface burst rate: 18 MB/sec (18939 KB/sec)
[13:33:16] Starting Spin-Up/Down Test
[13:33:21] Spin-up time: 2.04 seconds
[13:33:34] 0:17 Spin-down time: 2.62 seconds
[13:33:34] Starting Load/Eject Test
[13:33:36] Eject time: 1.78 seconds
[13:33:46] Load time: 10.11 seconds
[13:33:46] 0:12 Recognition time: 0.00 seconds

thats all the info cd speed gave me. hope it helps.


#8

General Information

Operating System Windows XP
Drive _NEC DVD_RW ND-3520A
Firmware Version 1.UA
Serial Number 52SF864S111
Disc DVD-R
MID RITEKG05
Capacity 4.18 GB

Transfer Rate

Start 6.53x
End 13.67x
Average 11.64x
Type P-CAV

Seek Times

Random 105 ms
1/3 127 ms
Full 230 ms

CPU Usage

1X 10 %
2X 20 %
4X 38 %
8X 74 %

Interface

Burst Rate 20435 KB/sec

Spin Up/Down Times

Spin Up Time 2.35 sec
Spin Down Time 2.73 sec

Load/Eject Times

Load Time 12.40 sec
Eject Time 1.76 sec
Recognition Time 0.13 sec

Log

Time Elapsed Action
[13:29:19] Starting Transfer Rate Test
[13:31:29] 2:10 Speed:21-47 X CAV (35.68 X average)
[13:31:29] Starting Seek Times Test
[13:31:41] Random Seek: 115 ms
[13:31:53] 1/3 Seek: 116 ms
[13:32:14] 0:44 Full Seek: 206 ms
[13:32:14] Starting CPU Usage Test
[13:32:29] CPU usage at 1X: 1 %
[13:32:44] CPU usage at 2X: 2 %
[13:32:59] CPU usage at 4X: 4 %
[13:33:14] 1:01 CPU usage at 8X: 7 %
[13:33:14] Starting Burst Rate Test
[13:33:16] 0:02 Interface burst rate: 18 MB/sec (18939 KB/sec)
[13:33:16] Starting Spin-Up/Down Test
[13:33:21] Spin-up time: 2.04 seconds
[13:33:34] 0:17 Spin-down time: 2.62 seconds
[13:33:34] Starting Load/Eject Test
[13:33:36] Eject time: 1.78 seconds
[13:33:46] Load time: 10.11 seconds
[13:33:46] 0:12 Recognition time: 0.00 seconds
[13:37:37] Starting Transfer Rate Test
[13:42:30] 4:53 Speed:7-14 X P-CAV (11.64 X average)
[13:42:30] Starting Seek Times Test
[13:42:41] Random Seek: 105 ms
[13:42:53] 1/3 Seek: 127 ms
[13:43:16] 0:47 Full Seek: 230 ms
[13:43:16] Starting CPU Usage Test
[13:43:32] CPU usage at 1X: 10 %
[13:43:47] CPU usage at 2X: 20 %
[13:44:03] CPU usage at 4X: 38 %
[13:44:19] 1:03 CPU usage at 8X: 74 %
[13:44:19] Starting Burst Rate Test
[13:44:21] 0:02 Interface burst rate: 20 MB/sec (20435 KB/sec)
[13:44:21] Starting Spin-Up/Down Test
[13:44:26] Spin-up time: 2.35 seconds
[13:44:39] 0:18 Spin-down time: 2.73 seconds
[13:44:39] Starting Load/Eject Test
[13:44:41] Eject time: 1.76 seconds
[13:44:54] Load time: 12.40 seconds
[13:44:54] 0:15 Recognition time: 0.13 seconds

and this was from cd speed but with a dvd instead.


#9

bugger i forgot to put these up in there to.