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  #1  
Old May 14, 2003, 12:44 PM
deanodarlo deanodarlo is offline
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Join Date: Jan 2001
Location: Darlington
Posts: 10
Default Verbatim CDRW 24x 700MB tests

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Here are some real life performance tests for the brand new Verbatim 24x 700MB CDRW media.

This stuff is growing off trees over here.

Posting this around a few forums so people can see what to expect from Ultra Speed CDRW media and drives.


TEST 1 - BRAND NEW MEDIA
----------------------------------

2 brand new Verbatim 24x 700MB CDRW, one burned at 16x and the other 24x.


Hardware
------------

See sig Liteon 48246K F/ware SK0A


Media Info:
--------------

BRAND NEW. 1st Time burn

Disc Type, Material = HSCD-RW, Phase Change
ATIP Lead-in = 97m 34s 24f
Nominal Capacity = 702.83MB (79m 59s 74f)
Disc Manufacturer maybe = Mitsubishi
SMART-BURN Speed Limit = 24X


Data Info
------------

2106 Files, 238 Folders = 700MB recorded data


Recording Time (Might be of interest as this is the 6K SFF drive)
-------------------------------------------------------------------------------

16x: 5m30s 24x: 5m14s


Compatibility
-----------------

Data recovery back to hard drive was 17x AVERAGE read (non sequential) for both the 16x and 24x burns on 2 different brands of DVD/CDROM readers.

32x AVERAGE sequential read for both burns on those same readers.

CD speed results:
----------------------

Passes scan disk and quality test with perfect results.


CD Doctor (FULL SPEED READ)
-------------------------------------

Recorded at 16x
[IMG]********homepage.ntlworld.com/deanodarlo/cdrw16x.png[/IMG]

Recorded at 24x
[IMG]********homepage.ntlworld.com/deanodarlo/cdrw24x.png[/IMG]


Notes
-------

Tested a disk that has been written to 10+ times with quick erase only. Very similar results. In fact much lower C1 values but the shape of the graph the same (see test 2 below). Media seems to retain it's quality for multiple writes.

Full erase not needed - seems to make little difference to final burn.

Scan disk can be a bit flaky and give different results when you run it multiple times on the same disk. One time it might show a yellow sector, the next all green, the next several yellow - all on the same burn. Approx. 4/5 times the disk checks all green.

No C2 errors to report after multiple writes to different disks.

One burn resulted in slower reading and a yellow band in scan disk. After a quick erase and burn, the disk was back to normal giving green on several subsequent burns.


TEST 2 - 5 SUBSEQUENT WRITES ON USED MEDIA
---------------------------------------------------------------

One "used" Verbatim 24x 700MB CDRW. Written to 10 times with different data before undergoing these tests.

Quick erase only before each subsequent write.

AGAIN FULL SPEED READ IN CD DOC.

Write 1 - 24x CD speed data write
[IMG]********homepage.ntlworld.com/deanodarlo/cdrwusedrun1.png[/IMG]

Write 2 - 24x 2106 Files, 238 Folders = 700MB recorded data
[IMG]********homepage.ntlworld.com/deanodarlo/usedcdrw24x.png[/IMG]

Write 3 - 24x CD speed data write
[IMG]********homepage.ntlworld.com/deanodarlo/cdrwusedrun2.png[/IMG]

Write 4 - 16x 2106 Files, 238 Folders = 700MB recorded data
[IMG]********homepage.ntlworld.com/deanodarlo/usedcdrw16x.png[/IMG]

Write 5 - 24x CD speed data write
[IMG]********homepage.ntlworld.com/deanodarlo/cdrwusedrun3.png[/IMG]


Notes
-------

After several writes, it's actually performing better in its "used" state compared to when it was brand new!

Again all green and no slow downs in cd speed scan and quality check.

Finally, after 15 writes, here is the standard 8x CD Doc read test, although not a very good indication of real life performance.

[IMG]********homepage.ntlworld.com/deanodarlo/usedcdrw8xread.png[/IMG]

Last edited by deanodarlo; May 14, 2003 at 03:08 PM.
  #2  
Old May 14, 2003, 02:04 PM
BlackDiamondJr BlackDiamondJr is offline
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I must say that I am extremely impressed though not totally surprised. The Japanese made media has always performed well and this Mitsubishi is no exception. Mitsubishi and Taiyo Yuden media are some of the best, unlike the Ritek, CMC Magnetics - Imation, Prodisc junk. It's very unusual for RW media to post no C1 or C2 errors with CD Doctor reading at full speed.
  #3  
Old May 14, 2003, 06:02 PM
deanodarlo deanodarlo is offline
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Join Date: Jan 2001
Location: Darlington
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Default

I'm impressed too.

I'll just add that the graphs above (CLV 16x) show very similar error performance to my old mitsumi 4804TE 4x CLV drive and datastone/infodisk/memorex 4x CDRW media, but burns nearly four times quicker! Impressive that standards have been kept in check - some others struggle to do this with higher speed CDRW's.

I've heard really bad things about datastone/infodisk/memorex cdrw's, but I have 9 that are over 2 years old, been used MANY times and still going strong! I've never used full erase and they all have no C2 errors and about the same or lower C1's than the graphs above for the Verbatim! Just tested them now to compare! They must have liked the mitsumi drive because I never had an issue with their (and others) 4x CDRW's. Perhaps it's only the faster stuff that's crap from memorex.

Surprising that the 24x Verbatim media required a "settling in" period however for best performance. Or perhaps it performs better when the disk is warm/recently written too! Who knows, I'm no expert. My old CDRW's may have been the same but my old drive couldn't report errors.

Still, if they're no C2 errors it doesn't really matter.

Last edited by deanodarlo; May 14, 2003 at 06:43 PM.
 

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