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Home > Hardware Reviews > Optical Storage > CD-ROM

Monday, February 18, 2002
Philips 48x CD-ROM

2. Data Tests

Philips (Aopen) 48x IDE CD Rom - Page 2

Data Tests

Test Machine:
ABIT BH6
Celeron 300A over clocked to 464 MHz
128 MB SDRAM PC 100
Quantum Fireball EX 6.4 GB UDMA
CL RivaTNT
CL AWE32
MS Windows 98 Build 4.10.2136
Teac 532E-A Firmware : v3.0a (with Auto Insert Notification & Sync transfer off)
Plextor UltraPlex 40max, Firmware v1.01, (with Auto Insert Notification off & Sync transfer on).

Test Method:
I used CD Speed 99 v0.2b & SCSI Mechanic v2.1e to run Data tests. Also used CDRWin v3.7b & Fire Burner v0.85b to determine specific details. All tests done with the same CD on every CD Rom.

CD Speed  results:       (Speed : Bigger is better,  Seek Times : less is better, CPU Usage : less is better)

Speed (x)

Seek Time (ms)

CPU Usage (%)

Start

Average

End

Random

1/3

Full

1x

2x

4x

8x

Teac 32x

15.14

24.74

31.73

85

93

161

2

4

9

18

Plextor 40x

18.65

31.62

41.90

87

89

126

2

3

7

14

Philips 48x

21.52

35.29

48.44

87

138

202

1

2

2

5

The first comparison shows Plextor rules at seek time from his opponents. Philips seems faster as expected and with less CPU Usage. Teac seems to be somewhere middle.

SCSI  Mechanic results:

Random I/O
throughput (kb/s)

Sequential I/O
throughput (kb/s)

Same Sector I/O
throughput (kb/s)

Min

Average

Max

Min

Average

Max

Min

Average

Max

Teac 32x

460

858

1056

923

4258

5951

643

1673

1847

Plextor 40x

377

720

921

832

4417

6590

547

1178

1456

Philips 48x

328

696

927

931

4329

7952

635

1541

1775

This test revealed several things such as if drive's succeed to reach their (supposedly) max speeds. The test showed that drive's can reach namely max speed but not sustain it for long time. Max speed is peek at (1) sec, not sustained data transfer rate. Average is close to reality. Teac here rules as (it has the smaller speed 32x which allows it to have less ppm and keep sustain data transfer rate). Plextor and Philips come behind. Now it is clearly speed isn't the main issue. When we use the drive we must look for the average data transfer rate. If the drive can sustain data transfer close to his  namely max speed is good. If not.. then we must look for another drive.

CDRWin and Fire Burner results:
That was a surprise. Both programs detected some different features from specifications (as the drive isn't capable of reading RW & CD+G CDs). More Fire Burner reported that the drive has only 128 KB cache instead of 512 KB (which Philips says.). So I tested missing features. The drive reads RW CDs. (RW closed & open session).  Didn't had a CD+G CD to test.




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