I would never connect an optical drive to a hard drive.Your installation is correct with master being the cdrw and cdrom the slave.These are your specs for that model so it does support DMA. Speed : CD-ROM 52x ( 22x ~ 52x, Average 38x ) Interface : ATAPI-E / IDE Sustained Transfer Rate : 3300 ~ 7800KB/sec ( Average : 5700KB/sec ) Burst Transfer Rate : PIO mode 4 ( 16.6MB/sec ) SW DMA 2 ( 8.3MB/sec ) MW DMA 2 ( 16.6MB/sec ) Ultra-DMA 2 ( 33.3MB/sec) Access Time : 80ms ( typical ) Support Disc Format : CD-ROM / XA, CD-DA, Mixed-Mode, CD-I, VCD, Photo-CD, CD-Extra, CD-TEXT CD-R, CD-RW, Single / Multi-Session, Karaoke-CD, I-Trax, E-CD, 8cm & 12cm disc Support Operating System : Windows 95 / 98 / NT / ME / XP / 2000 MTBF : 120,000 Power On Hours with 10% Duty Audio : S/N >= 60dB Earphone >= 0.5 Vrms @ 1KHz Temperature & Humidity : Operating : 5C to 45C; RH : 15% to 80%, Non-Condensing Non-Operating : -20C to 60C; RH : 15% to 90%, Non-Condensing Dimension : W x H x D : 145.8 x 41.3 x 190.0 mm Weight : <= 1.0Kg User Interface : LED Indicator, Stereo Ear Phone Jack, Volume Knob, Stop / Eject Button, Play / Skip Button IDE Socket, Power Input, Analog Audio Output, Digital Out, Master / Slave / CS Jumper Make sure you are using an 80 pin cable and the blue end is on the motherboard.Select DMA if available in the hardware device manager under IDE ATA ATAPI Controllers secondary IDE. Also if you are using an Intel chipset read this because UDMA might be disabled by default by Windows. UDMA66 According to Microsoft, UDMA66 mode is disabled by default on a Windows computer with an Intel chipset that supports UDMA66. To enable UDMA66 mode you need to: Make sure the device supports UDMA66 mode Use a 80-pin IDE cable with the proper pin cut Add a registry key To add the registry key: Start the Registry Editor Go to HKEY_LOCAL_MACHINE \ System \ CurrentControlSet \ Control \ Class \ {4D36E96A-E325-11CE-BFC1-08002BE10318} \ 0000 \ Right-click an empty space in the right pane and select New > DWORD Value Name the new value EnableUDMA66 Double-click this new value, and enter 1 as it's Value data Close the registry editor Restart Windows for the changes to take effect When you restart your computer, the UDMA66 will be enabled if it is supported by the hardware. Let us know what kind of mother board or proccessor you have.