External USB Slim Recorders Comparison

Review Pages

1. Introduction / Haiway External ODD&HDD Device
2. Rodzone A11-SU3
3. Rioddas BT-638 (1st variation)
4. Amicool BT-686
5. Cocopa ECD813-Y
6. Pop-up ODD Device
7. Effelon ODD Device
8. Rioddas BT-638 (2nd variation)
9. HLDS PortableDVD
10. Comparison Of Specifications
11. CD Reading Performance
12. Writing Performance Test Methodology
13. Imation 52X CD-R
14. Maxell 52X CD-R
15. Maxell 52X PRINTABLE CD-R
16. PlexDisc 52X PRINTABLE CD-R
17. Ritek 52X CD-R
18. Verbatim 52X CD-R
19. DVD Reading Performance
20. DataWrite 16X DVD-R
21. HP 16X DVD-R
22. Maxell 16X DVD-R
23. No Brand 16X DVD-R
24. PlexDisc 16X DVD-R
25. TraxData 16X DVD-R
26. Verbatim 16X DVD-R
27. JVC 16X DVD+R
28. Maxell 16X DVD+R
29. Philips 16X DVD+R
30. Sony 16X DVD+R
31. Verbatim 16X DVD+R
32. Verbatim 8X DVD+R DL
33. Summary of Burning Results
34. Conclusion - Final Total Score

8.Rioddas BT-638 (2nd variation)

Due to our error, we managed to order a second Rioddas BT-638 drive, which as the same box and appearance as the previous Rioddas BT-638 drive we saw earlier...

Nothing special for this drive

At the bottom there is the connection cable

and opening the drive .. unveils a different drive than the first Rioddas BT-638...this time the drive is labeled as Lenovo and has a manufacturing date of March 2010

Its not possible to see the real manufacturer of the drive.

After connecting with the test PC, we saw that the 2nd variation of the Rioddas BT-638 comes from HL-DT-ST with codename GU10N and MX05 firmware. No newer firmware is found for this drive.

We used the latest USB Drive Info software and we found that the PC connects with the external drive at USB2.0 (High Speed) and not at advertised USB3.0, despite we used various USB3.0 ports at different systems. While this may work it might produce problems with newer systems...

Lastly we found around the internet the following drive's specs

Write Speed ( Max Speed )	DVD+R 8x ( CAV ) DVD+R DL 6x ( ZCLV ) DVD-R 8x ( CAV ) DVD-R DL 6x ( ZCLV ) DVD+RW 8x ( ZCLV ) DVD-RW 6x ( ZCLV ) DVD-RAM 5x ( ZCLV ) CD-R 24x ( CAV ) CD-RW US 24x ( ZCLV ) HS 10x ( CLV ) MS 4x ( CLV)
Read Speed ( Max Speed )	DVD-ROM 8x ( CAV ) DVD±R 8x ( CAV ) DVD+R DL ( Finalized Disc ) 8x ( CAV ) DVD-R DL ( Finalized Disc ) 6x ( CAV ) DVD±RW 8x ( CAV ) DVD-RAM ( 4.7G ) 5x ( ZCLV ) CD-ROM 24x ( CAV ) CD-R/RW 24x ( CAV ) CD-DA ( DAE ) 24x ( CAV )
Disc Diameter	12cm, 8cm
Interface	SATA
Data Transfer Rate	480M bps at high speed, 12M bps at full speed
Access Time	200ms ( typ )
Data Buffer	2MB
Loading Mechanism	Drawer Type
Environmental Condition
Ambient Temperature	Operating 5 to 45°C Non Operating -20 to 60°C Transportation -40 to 65°C
Ambient Humidity	Operating 8 to 80% ( non-condensing ) * Non Operating 5 to 95% ( non-condensing ) * Transportation 5 to 95% ( non-condensing ) *
Power Requirements	DC5V±5%
Current Consumption	Standby / Sleep 150mA ( Average current max ) During starting / Seek 1500mA ( Max, Spikes less 1ms )
MTBF	60,000POH ( 10% duty )
Safety / EMI Standards	UL, CUL, TUV, CB, CE and BSMI
Dimensions	128.0W x 9.5H x 129.4D ( mm )
Mass ( Weight )	160g or less
RoHS	Complied