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Lite-On LTR-24102B - CD-ROM Performance Results

  October 24, 2001 Author: Tim Zakharov  

For an overview on methodology, click here.

CD-ROM Performance Results

Low-Level Measurements

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Ziff-Davis' CD Winbench 99 measures sustained transfer rates and random access times.

The Lite-On comes in a hair under its 40X spec with an outside transfer rate of 5990 KB/sec. This still places it ahead of the CRW2200E, but the drive nonetheless trails other 40X readers.

However, in access time tests the LTR-24102B averages 89 ms, leaving it just behind the MP7200A for 3rd place and significantly ahead of drives from Samsung, Yamaha and Plextor.

CD-ROM Winmark 99

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CD Winbench 99's CD-ROM Winmark test runs through a timed script of routines from a variety of popular software programs. The presented score averages four different test discs obtained through Ziff-Davis. This tests each drive's ability to read from a range of discs pressed with identical data.

The LTR-24102B weighs in with a score of 1463 KB/sec, a scant 1% behind category-leading Ricoh. Even better, scores deviate by less than 1%, indicating consistent read performance with a variety of pressed media.

File and Disc Copy

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The file copy test emphasizes sequential transfer rates by copying a single, 634 MB file. Once again the Lite-On impresses, this time with a copy time of 2:37. This squeezes just past Plextor's PX-W2410TA for the top spot in sequential copies.

The disc copy test introduces random accesses through the multiple files and folders on the test CD. Here the LTR-24102B's copy time of 3:15 places it just 4% back of the Teac CD-W516EB for the top spot.

Digital Audio Extraction

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SR measures DAE using two programs: CDSpeed99 and CDDAE99. CDSpeed99 measures low-level DAE capabilities while CDDAE99 is an actual audio ripping program that converts audio tracks on CD-DAs to .wav files on the hard drive.

CDSpeed99 reports interesting results. The LTR-24102B takes an inordinate amount of time to spin up to full spindle speeds with CD-DA media, resulting in a minimum extraction rate of just over 9X at the innermost tracks. This phenomenon is present in all three tested firmware revisions. Once the drive does get up to full spindle speeds, it extracts at rates nearly identical to competition from Plextor and Ricoh. The Lite-On finishes at 38X; its average DAE rate is nearly 29X. Its slow starting rates weigh the average down a bit from the PX-W2410TA and MP7200A. CDSpeed reports perfect extraction quality and support for accurate streaming.

CDDAE confirms the slow initial DAE. Nearly the entire first track on our test CD-DA extracts in the 9X range. Only towards the end of this track does the drive spin up to top speeds. Once this occurs the drive extracts at speeds comparable to other 40X audio extractors. In the end, it takes 2:37 to extract the test CD in its entirety. This is 22 seconds slower than the PX-W2410TA. CDDAE99 reports no errors in extraction quality, nor does it show the LTR-24102B slowing down at all with scratched media.

CD-DA Error Correction

Digital Recordings' CD-CHECK tests each drive's error correction abilities with audio CDs. CD-CHECK is a reference disc with five levels of error gap sizes, each isolated to its own track. Error size and other details may be viewed by clicking here.

A continuous 20-second tone plays in each track. The larger the error gap, the more difficult it is for the drive's error correction to mask the error without an audible pop or click occurring during playback of the tone.

All tested drives play each track five times with each successful playback (no audible pops or clicks) noted. A result of 5/5 indicates that no pops or clicks were heard in 5 out of 5 playbacks of a particular track. A result of 0/5 indicates pops or clicks occurred during all 5 playbacks of a particular track. Digital Recordings indicates the following interpretation of results:

  • Level-1 Pass: Player meets minimum requirements
  • Level-2 Pass: Average error correction
  • Level-3 Pass: Good error correction
  • Level-4 Pass: Very good error correction
  • Level-5 Pass: Excellent error correction
CD-Check Performance
Error Level 1 2 3 4 5
Plextor PX-W1610TA 5/5 5/5 5/5 5/5 0/5
Teac CD-W516EB 5/5 5/5 5/5 5/5 0/5
Lite-On LTR-24102B 5/5 5/5 5/5 5/5 0/5
Ricoh MP7200A 5/5 5/5 0/5 0/5 0/5
Yamaha CRW2200E 5/5 0/5 0/5 0/5 0/5
Samsung SW-216B 5/5 0/5 0/5 0/5 0/5

The Lite-On delivers impressive error correction abilities! In the CD-CHECK test it ties the PX-W2410TA and CD-W516EB for top honors. This is also an improvement over Lite-On's previous burner, the LTR-16101B and assures consumers of a noise-free listening experience when playing CDs on the drive.

CD-R Media Compatibility and Performance

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Low-level performance measurements on duplicates of the pressed test CD assess a drive's ability to read from a variety of CD-R and -RW media.

Lite-On's latest burner reads CD-R media at 40X CAV speeds. Our measurements indicate 6040 KB/sec at the outer edge, with 89 ms access times. The transfer rate results virtually equal the best of the competition while access time measures are second only to the Teac CD-W516EB.

CD-RW Media Compatibility and Performance

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With CD-RW media, the LTR-24102B locks in with a transfer rate of 2460 KB/sec, or 16X. This is one area we focused on with the various firmware revisions, but performance did not change between the revisions. Because transfer rates are constant, spindle speeds vary when reading from different areas on a disc. As a result, one may experience delays when accessing random locations because the spindle motor may have to ramp up or down drastically, depending on the situation. For example, when reading CD-RW media the LTR-24102B spins at about 8000 RPM at the innermost tracks, while falling to below 4000 toward the outer edge of a disc. Many years ago when CD readers used this read method (called CLV, or Constant Linear Velocity), such random access pitfalls (as well as the added strain to the spindle motor) are what prompted manufacturers to switch to the CAV (Constant Angular Velocity) method that this drive uses with pressed CDs and CD-R media. All other burners in our comparison use CAV to read CD-RW media. Not surprisingly, access times fall to 109 ms here.

 Write/ReWrite Performance Results...


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