Unable to burn DMG files to CDs on external USB2 disc burners?

Hello.
I am having difficulties burning 88.x MB DMG files to CDs (new CD-Rs and an old CD-RW) onto two different external USB2 disc burner drives (both have power AC connected: HP and LG Super brands). The new Mac Mini (no disc slot drive)'s updated 64-bit Mac OS X 10.7.4's Disk Utilities tries to burn and then fail right away or after a few seconds. The error says "Unable to burn 'whatever.dmg' (The disc drive did not respond properly and can't recover or retry." Nothing interesting in dmesg, but Disk Utility's logs had details: http://pastie.org/private/6tnqcnkwycr2yftp8gkzxw ...
I do see my drives' lights on during the burn. I can quick erase the old CD-RW fine. I can burn 538 MB from an 64-bit Windows 8 on my Acer AM3800 PC with the same discs and external burner drives without any problems. Also, I thought it was my USB cable extension, but it wasn't it. I don't use any USB hubs either. DMG files are fine too. I did notice copying from a CD to Mac Mini's local HDD was slow, but no failures.
What could be the problem? Is USB2 too slow or something? Thank you in advance.

Did you look at...
~/Library/Logs/DiscRecording.log
USB2 is slow, but not that slow, but have you tried reducing the burn speed?
At the Apple Icon at top left>About this Mac, then click on More Info, then click on Hardware>Disk Burning & report what it says, like ...
TSSTcorp CDDVDW SH-S222L:
Firmware Revision:    SB02
Interconnect:    ATAPI
Burn Support:    Yes (Unsupported)
Profile Path:    None
Cache:    2048 KB
Reads DVD:    Yes
CD-Write:    -R, -RW
DVD-Write:    -R, -RAM, -RW, +R, +RW, +R DL
Burn Underrun Protection CD:    Yes
Burn Underrun Protection DVD:    Yes
Write Strategies:    CD-TAO, CD-SAO, CD-Raw, DVD-DAO
Media:
Media Type:    DVD-RW
Blank:    Yes
Erasable:    Yes
Overwritable:    Yes
Appendable:    Yes
Mac OS X: Cannot print, use Classic, start file sharing, burn discs, or update software if /tmp missing...
http://support.apple.com/kb/TA21161?viewlocale=en_US
To avoid these issues, you guessed it, you shouldn't delete the /tmp symbolic link from the Mac OS X volume.
If /tmp is missing, it's easy to make a new one by following these steps:
Mac OS X 10.3 or later
Recreate the missing /tmp link by using the Disk Utility application to repair permissions on your Mac OS X startup volume.
Might try Burn...
http://burn-osx.sourceforge.net/Pages/English/home.html

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