24x rated CD-RW only writes at 16x

[dbminter]

I've noticed this now on two computers and on 2 different SATA drives and 1 USB drive. I have some Memorex MCC CD-RW's. Normally, I'd call the CMC card, but, these are MCC discs so they have actually performed well. But, the discs are rated 24x but never burn beyond 16x. Can anyone think of anything?

 

 

Here's a log, though, I doubt that will help much, but, I don't want to get chaired!

 

 

I 16:30:26 Microsoft Windows 7 Home Premium x64 Edition (6.1, Build 7601 : Service Pack 1)

I 16:30:26 Total Physical Memory: 8,370,632 KB - Available: 6,132,532 KB

W 16:30:26 Drive F:\ (FAT32) does not support single files > 4 GB in size.

W 16:30:26 Drive G:\ (FAT32) does not support single files > 4 GB in size.

W 16:30:26 Drive I:\ (FAT32) does not support single files > 4 GB in size.

W 16:30:26 Drive M:\ (FAT32) does not support single files > 4 GB in size.

W 16:30:26 Drive O:\ (FAT32) does not support single files > 4 GB in size.

W 16:30:26 Drive P:\ (FAT32) does not support single files > 4 GB in size.

W 16:30:26 AnyDVD can interfere with ImgBurn's ability to verify accurately, please ensure it's disabled!

W 16:30:26 Duplex Secure's SPTD driver can have a detrimental effect on drive performance.

I 16:30:26 Initialising SPTI...

I 16:30:26 Searching for SCSI / ATAPI devices...

I 16:30:27 -> Drive 1 - Info: ATAPI iHAS422 8 4L18 (K:) (ATAPI)

I 16:30:27 -> Drive 2 - Info: Optiarc DVD RW AD-7260S 1.03 (S:) (ATAPI)

I 16:30:27 -> Drive 3 - Info: BKHC 7C1Y3K9EJ 3.5Z (L:) (SCSI)

I 16:30:27 -> Drive 4 - Info: BKHC 7C1Y3K9EJ 3.5Z (N:) (SCSI)

I 16:30:27 -> Drive 5 - Info: BKHC 7C1Y3K9EJ 3.5Z (R:) (SCSI)

I 16:30:27 Found 2 DVD±RW/RAMs and 3 BD-ROMs!

I 16:30:34 Operation Started!

I 17:44:46 Device: [0:2:0] Optiarc DVD RW AD-7260S 1.03 (S:) (ATAPI)

I 17:44:46 Media Type: CD-RW (Disc ID: 97m34s24f, Mitsubishi Chemical Corp.)

I 17:44:46 Media Supported Write Speeds: 16x, 24x

I 17:44:46 Quick Erase: Yes

I 17:44:46 Erasing Disc...

I 17:45:03 Operation Successfully Completed! - Duration: 00:00:17

I 17:45:04 Operation Started!

I 17:45:04 Source File: Hiren's.BootCD.14.1.iso

I 17:45:04 Source File Sectors: 268,999 (MODE1/2048)

I 17:45:04 Source File Size: 550,909,952 bytes

I 17:45:04 Source File Volume Identifier: HBCD 14.1

I 17:45:04 Source File Application Identifier: MKISOFS ISO 9660/HFS FILESYSTEM BUILDER & CDRECORD CD-R/DVD CREATOR © 1993 E.YOUNGDALE © 1997 J.PEARSON/J.SCHILLING

I 17:45:04 Source File File System(s): ISO9660 (Bootable), Joliet

I 17:45:04 Destination Device: [0:2:0] Optiarc DVD RW AD-7260S 1.03 (S:) (ATAPI)

I 17:45:04 Destination Media Type: CD-RW (Disc ID: 97m34s24f, Mitsubishi Chemical Corp.)

I 17:45:04 Destination Media Supported Write Speeds: 16x, 24x

I 17:45:04 Destination Media Sectors: 359,847

I 17:45:04 Write Mode: CD

I 17:45:04 Write Type: SAO

I 17:45:04 Write Speed: MAX

I 17:45:04 Lock Volume: Yes

I 17:45:04 Test Mode: No

I 17:45:04 OPC: No

I 17:45:04 BURN-Proof: Enabled

I 17:45:04 Write Speed Successfully Set! - Effective: 4,234 KB/s (24x)

I 17:45:04 Filling Buffer... (40 MB)

I 17:45:04 Writing LeadIn...

I 17:45:16 Writing Session 1 of 1... (1 Track, LBA: 0 - 268998)

I 17:45:16 Writing Track 1 of 1... (MODE1/2048, LBA: 0 - 268998)

I 17:48:14 Synchronising Cache...

I 17:48:30 Exporting Graph Data...

I 17:48:30 Graph Data File: Optiarc_DVD_RW_AD-7260S_1.03_SUNDAY-AUGUST-28-2011_5-45_PM_97m34s24f_MAX.ibg

I 17:48:30 Export Successfully Completed!

I 17:48:30 Operation Successfully Completed! - Duration: 00:03:26

I 17:48:30 Average Write Rate: 3,039 KB/s (20.3x) - Maximum Write Rate: 3,634 KB/s (24.2x)

I 17:48:30 Cycling Tray before Verify...

W 17:48:38 Waiting for device to become ready...

I 17:48:44 Device Ready!

I 17:48:47 Operation Started!

I 17:48:47 Source Device: [0:2:0] Optiarc DVD RW AD-7260S 1.03 (S:) (ATAPI)

I 17:48:47 Source Media Type: CD-RW (Disc ID: 97m34s24f, Mitsubishi Chemical Corp.)

I 17:48:47 Source Media Supported Write Speeds: 16x, 24x

I 17:48:47 Image File: Hiren's.BootCD.14.1.iso

I 17:48:47 Image File Sectors: 268,999 (MODE1/2048)

I 17:48:47 Image File Size: 550,909,952 bytes

I 17:48:47 Image File Volume Identifier: HBCD 14.1

I 17:48:47 Image File Application Identifier: MKISOFS ISO 9660/HFS FILESYSTEM BUILDER & CDRECORD CD-R/DVD CREATOR © 1993 E.YOUNGDALE © 1997 J.PEARSON/J.SCHILLING

I 17:48:47 Image File File System(s): ISO9660 (Bootable), Joliet

I 17:48:47 Read Speed (Data/Audio): MAX / MAX

I 17:48:51 Verifying Session 1 of 1... (1 Track, LBA: 0 - 268998)

I 17:48:51 Verifying Track 1 of 1... (MODE1/2048, LBA: 0 - 268998)

I 17:51:11 Exporting Graph Data...

I 17:51:11 Graph Data File: Optiarc_DVD_RW_AD-7260S_1.03_SUNDAY-AUGUST-28-2011_5-45_PM_97m34s24f_MAX.ibg

I 17:51:11 Export Successfully Completed!

I 17:51:11 Operation Successfully Completed! - Duration: 00:02:18

I 17:51:11 Average Verify Rate: 4,014 KB/s (26.8x) - Maximum Verify Rate: 5,573 KB/s (37.2x)

[Cynthia]

I 17:48:30 Average Write Rate: 3,039 KB/s (20.3x) - Maximum Write Rate: 3,634 KB/s (24.2x)

[dbminter]

That's weird. I never saw that. I only ever saw it say 16x. I didn't actually see what the log said. I'll try to remember to actually watch the totals next time I burn a 24x CD-RW.

[spinningwheel]

I believe it means that the average speed for the whole disc write is 20.3x while the fastest it wrote at some point in time is 24.2x. The disc speed has to ramp up at certain points and that is controlled by the drive and not the program. The drive is writing to a smaller track as it starts and a much larger track as it reaches it's max speed and therefore burns more data per rpm....or I could be wrong deeb.

[dbminter]

I performed the exact same burn as in the log, only difference was to a different 24x CD-RW sample disc. It wrote at 16x max for 36% of the burn, then dipped, but it would be expected because it was getting ready to increase to 24x, as it did. Actually, it even reached 24.1x.

[dbminter]

It makes sense that some drives don't always write at the maximum speed at first. The LiteOn's I've had started 8x DVD+RW discs at 6x then after like 2 minutes, bumped up to 8x.

[dbminter]

I think I figured out why I had thought the drive was "stuck" at 16x. I was burning small image files, small even by a CD's max space standard, and the burn never lasted long enough to get to the point where the burn switched from 16x to go higher all the way up to 24. Kind of like 8x DVD+RW's on LiteOn drives. They start at 6x for a while and only get to 8x after a set period of time writing at 6x. So, my test DVD image, being about only 1 GB, was such a short burn that it appears as if the drive is only writing at 6x to them. I've encountered that problem before on the LiteOns, so, that's probably why I thought the drive was stuck at 16x on 24x CD-RW's.