NEC 3540A Very Slow

I use an external enclosure with my laptop for my nec 3540A Burner.

I originally had a Toshiba 5272 burner in this enclosure and it originally burned fine, 13 minutes with DVD+R 4x media. Then it started to burn all DVD+R media in 25 minutes. It also started to burn coasters using the same DVD+R 4X media that used to burn in 13 minutes. Not what changes were made to computer prior to slow burning times. I did used external box to get information off of a bad harddrive at work (mabey this did something). Anyways before I had these slow burns the Toshiba was a very picky burner so I decided to upgrade to the NEC 3540A after reading the good reviews from different sites and researching its media compatibility and burn speeds on videohelp.com. Now that I have the 3540A hooked up in the same enclosure as the toshiba was my burn time has increased to 30 minutes. I have TDK DVD+R 8x, Sonic DVD+R 8x, and Sonic DVD+R 4x all burn at the same 30 minutes.

Here is some information about my Computer and the drive.
Laptop = Compaq Presario 2580US
Processor = Intel 2.3GHz
448MB RAM
Primary IDE Channel Transfer Mode = DMA if available.
Primary IDE Channel Current Transfer Mode = PIO Mode.
Secondary IDE Channel Transfer Mode = DMA if available.
Secondary IDE Channel Current Transfer Mode = Multi-Word DMA Mode 2.
Nero CD-DVD Speed Test Results:
Transfer Rate = 9.63 Average
Burst Rate = 15MB/s
Create Data Disc = 6.67 Average

When hooked up to my work computer it takes over an hour to burn.
Work computer:
Processor = Intel Pentium 4 1.6GHz
523,760KB RAM
Primary IDE Channel Transfer Mode = DMA if available.
Primary IDE Channel Current Transfer Mode = Ultra DMA Mode.
Secondary IDE Channel Transfer Mode = DMA if available.
Secondary IDE Channel Current Transfer Mode = Ultra-DMA Mode.

Any suggestions??
Please help!!

I just took my external enclosure apart and I see that it has an ALI chipset in it.
Here is what it says on it:
ALI
M5621 A1
0402 TH05
XHG5GC00000I

Here is what I found on my ALI Chipset. Any Help???

M5621
ALi High-Speed USB2.0 IDE Device Controller
ALi’s M5621 presents a highly-integrated solution for an USB-based peripheral applications, with ALi’s design expertise in SOC peripheral development and extensive know-how in interface and multimedia application. Through the highly flexible features and programmable capabilities to supportstandalone USB interface bridge application or work with external controller or ISA-based Device CPU for customized solution, M5621 is fully capable of achieving a most compact and yet costeffective solution for varieties of high-speed peripheral system to meet both the customers’ requirements and the end-users’ need. High-Speed USB2.0 Compliant USB2.0-to-IDE Interface Controller PIO/DMA-based Device Controller Built-in MCU & GPIO Control USB ID EEPROM & Ext. Program ROM Support Functional Block Diagrams
ALi
M5621
USB
2.0/1.1
UltraDMA
66/33
GPIO
USB ID EEPROM
Program ROM (optional)
ALi
M5621
USB
2.0/1.1
8/16-bit
PIO/DMA
Interface
GPIO
USB ID EEPROM
Program ROM (optional)
Scanner, Printer, MFP,
or Camera Control ASIC
Smart InfoPeripheral
Built-in Clock Synthesizer
100/64-pin TQFP package
High-Speed USB2.0 Compliant with built-in high/full-speed transceiver,
SIE&UBL
Supports User-Configurable Endpoints for bulk, interrupt, control transfers to
allow bulk-transfer-based device operation for IDE storage device, scanner,
printer, camera or multi-function peripherals
Built-in USB2.0-to-IDE Interface Controller with general IDE interface & bulkonly
transport of USB mass storage class support upto UDMA66 for storage
devices as DVD/CD-ROM, CD-R/W, Hard-Disk and Compact Flash device, etc.
Built-in PIO/DMA-based Device Controller with industry-standard 8/16-bit
PIO/DMA & Multi-word DMA supported for standard MCU/DCPU operation
Configurable Standalone UTMI-compliant USB2.0 PHY Operation Supported
Built-in High-performance Micro-controller Engine for interface & multifunctional
control
Support Ext. USB ID EEPROM, Ext. Program ROM & GPIOs Control
Built-in Clock Synthesizer for using low-cost 12Mhz crystal or external 12Mhz
clock sources
100-pin TQFP or 64-pin TQFP package
OS System Platform Supported, including WindowsXP/2000/Me/98SE & Mac,
etc.
Features :
M5621
ALi High-Speed USB2.0 IDE Device Controller
525, East Brokaw Road,
San Jose, CA, 95112 USA.
Tel: +1-408-452-4900
Fax:+1-408-452-4935
http://www.aliusa.com
2F, No.246, Nei Hu Road,
Sec.1, 114 Taipei, Taiwan
Tel: +886-2-8752-2000
Fax: +886-2-8751-1003
http:// www.ali.com.tw

Any Help out there???

“Primary IDE Channel Transfer Mode = DMA if available.
Primary IDE Channel Current Transfer Mode = PIO Mode.
Secondary IDE Channel Transfer Mode = DMA if available.
Secondary IDE Channel Current Transfer Mode = Multi-Word DMA Mode 2.

Here is your problem when you hook up the NEC directly to your computer. You need to enable UDMA for the relevant IDE channel. No modern burner will work properly with PIO or Multi-word DMA.

As for the external enclosure, I have no clue sorry. :frowning:

Something’s wrong with your config anyway, I can’t see why one of your IDE channels is stuck in PIO!

If the drive is connected to the laptop, i would have thought the laptops hard drive is nowhere near fast enough for 16x burning, although 8x should be possible.