Rivia

I downloaded the SB00 version and installed it. I was a bit anxious to proceed, but it appeared that the Samsung flashing utility works fine with W98SE. Unfortunately, that brought no changes for the DMA. I put the SB01 back, just in case. PS : there's no offense for me about your wallpaper. Simply, a French man notices that kind of details...

Hi, I thank you again for the time you took in helping me. : Charlotte : I won't have very much time in a near future to change my internal connections again and make new tests with the registry and so on... I'm not the only person who is using this PC, so it has to be operational from time to time... If I a propitious period occurs (maybe during holidays), I will try what you suggest and give you reports. Drugwash : Interesting... the only difference here seems to be the firmware version. One thing I could perhaps try would be a downgrade of the drive, if I can put a hand on a SB00 version ? PS : you apparently use some very nice wallpapers, don't you ?

Yes ! OK, the user manual of the BE6 doesn't tell anything about that. Concerning the ATA/66, it only explains how to install the drivers. This could possibly account for a problem when I used the ATA/66 connector. But could it when I put the drive on the secondary "classical" IDE ATA/33 connector ? I have 2 PCI slots occupied by a Sound Blaster card and a USB 2 card (based on a VIA chip). Otherwise, my video card is a Matrox in the AGP slot and I also have a FM radio card in a ISA slot (yes, still working !). I'm not familiar with those IRQs and I/O things, but I can copy you the informations displayed by MSInfo (some french terminology inside, I try to translate what could be not obvious) : 0 Horloge système [=System clock] 1 Logitech PS/2 Keyboard 2 Contrôleur d'interruptions programmable [=Programmable interrupt controler] 3 Port de communication (COM2) 4 Port de communication (COM1) 5 VIA PCI to USB Enhanced Host Controller 5 Matrox Millennium G400 DualHead - Français 5 IRQ Holder pour PCI Steering 6 Contrôleur de lecteur de disquette standard [=Floppy disk controler] 7 Port imprimante (LPT1) 8 Horloge système CMOS/temps réel 9 (libre) [=(Free)] 10 Creative SB Live! Value 10 Contrôleur VIA Tech 3038 PCI vers USB Universal Host 10 Contrôleur d'hôte PCI vers USB universel Intel 82371AB/EB 10 IRQ Holder pour PCI Steering 11 HPT366 Ultra DMA Controller 11 HPT366 Ultra DMA Controller 11 Contrôleur VIA Tech 3038 PCI vers USB Universal Host 11 IRQ Holder pour PCI Steering 12 Logitech-compatible Mouse PS/2 13 Coprocesseur arithmétique 14 Contrôleur IDE primaire (fifo double) 14 Contrôleur IDE standard double canal PCI 15 Contrôleur IDE secondaire (fifo double) 15 Contrôleur IDE standard double canal PCI The BIOS is an Award one, and there not very much parameters about IDE to play with. In fact, for each of the four ATA/33 channels, I can choose the PIO mode (0 to 4 and Auto) and the ultra DMA mode (Disabled or Auto). I left everything on Auto. However, and despite all my unsuccessful attempts so far to activate the DMA, I decided to finally burn a DVD (not only simulate) in order to see if it could work. And... it worked ! The burner needed a little more than half an hour to write about 3,9 GB of data, but it did write them. A bit of consolation in this cruel world...

I just made the change of driver you suggest, Drugwash. The Intel utility installed the so called "Contrôleur 82371AB/EB PCI Bus Master IDE Intel". I reinstalled the Windows original "Contrôleur IDE standard double canal PCI". But the DMA is still "uncheckable" for the Samsung drive. It's no surprise, since this latter driver was the only one present on my PC when I first noticed the issue. I installed the Intel INF utility only afterwards, in a try to figure out the problem.

I have found the Intel Application Accelerator, but... that utility doesn't support the 440BX chipset and refuses to install ! Bad luck...

Indeed, I found this utility during all the searches I made and installed it. Must I say ? But I thought I noticed a slight increase of the burning speed after that installation. Perhaps only my imagination, in fact ? The Device Manager tells me that the current driver for this controller is "C:\WINDOWS\SYSTEM\VMM32.VXD (CONFIGMG.VXD)". Isn't it the Windows' one ? I don't know this one yet... I'm going to look for it. By the way, I have tried TweakBIOS to force the activation of the DMA on the IDE channels : the result was a complete hang of the machine...

Well, you gave me a lot of work to do to test all that things... I didn't see this option before. After I read your message, I looked for it in the Devicer Manager and activate it. I innocently entered a value of 2048 KB, checked besides the DMA option for the Samsung burner and reboot. After the restart, I could observe that Windows had shrinked the DMA buffer size to 64 KB (!) and that the DMA option was again disabled. Of course, there was no change in the burning speed (never more than 12x average for a simulation of CD burning). For the Ultra ATA/33 IDE interface, 40 wire cables (at Drugwash attention, the chipset of the BE-6 is a Intel 440BX) : Channel 1 Master: 9GB IBM Hard Disk Channel 1 Slave: Nothing Channel 2 Master: Sony CD burner Channel 2 Slave: Samsung DVD burner (for the moment...) For the Ultra ATA/66 IDE interface, 80 wire cable (the controler seems to be a HighPoint HPT366 chip ?) : Channel 1 Master: 80GB Hard Disk (normally detected as UDMA 4 by the BIOS) Channel 1 Slave: Nothing Channel 2 Master: Nothing Channel 2 Slave: Nothing During my tests, I tried the following alternative combinations for the Samsung drive : 1) on the ATA/33 interface (with the 40 wire connector) : 1a) Channel 2 Master: Samsung DVD burner Channel 2 Slave: Nothing 1b) Channel 2 Master: Nothing Channel 2 Slave: Samsung DVD burner 2) on the ATA/66 interface (with the 80 wire connector, color code respected , otherwise my HDD would'nt even had worked, I think ?) 2a) Channel 1 Master: 80GB Hard Disk (detected ans displayed as UDMA 4 by the BIOS during the boot) Channel 1 Slave: Samsung DVD burner 2b) Channel 1 Master: Samsung DVD burner Channel 1 Slave: Nothing I forgot to say that when I connected the Samsung burner on the ATA/66 bus, the BIOS did NOT detected it as UDMA ! And when I tried to enter the configuration of the Ultra ATA/66 with the Samsung connected on it, the BIOS hanged. (I have installed years ago the last available version of the BIOS for my motherboard... ) No, I didn't flash the firmware of the burner, because it already has the last available version (SB01). Furthermore, I have some doubts about the W98 compatibility of the Samsung flashing utility... But you're right, I could try, just in case. Sorry, i somewhat suspected I didn't fully understand your request. This is indeed the present configuration. I don't have time at the moment to modify the connections and export the registry branches. I'll try to do that as soon as possible if that can give you some additional clues. I thank you all for your help.

Thank you for taking time to answer my questions... I have 40 wire cables on my UltraDMA/33 connectors (working fine with the CD burner and my old HDD) and, of course, a 80 wire on the UltraDMA/66 where my second HDD is connected. The DMA for the Samsung burner didn't seemed to activate either on the DMA/66 with the 80 wire cable (no DMA checkbox is accessible in the Device Manager with this configuration, but the writing speed was not enhanced). I don't use the CS selection, only Master or Slave. Yes, I did. Yes, I changed the jumpers accordingly each time I modified my connections. I didn't see a DMA jumper on that drive : only the classical CS, SL and MA. The installation guide doesn't refer either to this kind of jumper. I didn't mention that point in my initial message, but I have contacted the Samsung support hoping they could help me. They answered quite rapidly, I must say, and sent me the last firmware version. I could check that this version was already installed on the burner when I bought it (version SB01). However, I begin to think that it is most likely the cause of my problem. Do you mean I should physically unplug the Samsung drive before applying the patch ? That's an idea... When I made this test, I only removed the devices under my secondary IDE controller (the CD and DVD burners) in the Device Manager before I reboot the computer. However, the two new values "IDEDMADRIVE0"=hex:01 and "IDEDMADRIVE1"=hex:01 were effectively added in the registry in the branch "HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\hdc005" (associated to the secondary IDE controller). Here it is (hope that's what you expect... ) : [HKEY_LOCAL_MACHINE\Enum\SCSI\TSSTCORPCDDVDW_SH-S222A_S\MF&CHILD0001&PCI&VEN_8086&DEV_7111&SUBSYS_00000000&REV_01&BUS_00&DEV_07&FUNC_0110] "Capabilities"=hex:14,00,00,00 "AutoInsertNotification"=hex:00 "SCSITargetID"="1" "SCSILUN"="0" "RevisionLevel"="SB01" "ProductId"="CDDVDW SH-S222A " "Manufacturer"="TSSTcorp" "DeviceType"=hex:05 "Removable"=hex:01 "CurrentDriveLetterAssignment"="G" "DMACurrentlyUsed"=hex:00 "HardwareID"="TSSTCORPCDDVDW_SH-S222A_S,GenCD,SCSI\\TSSTCORPCDDVDW_SH-S222A_S" "Class"="CDROM" "ClassGUID"="{4d36e965-e325-11ce-bfc1-08002be10318}" "Driver"="CDROM\001" "Mfg"="(Périphérique CD-ROM standard)" "DeviceDesc"="TSSTcorp CDDVDW SH-S222A " "ConfigFlags"=hex:00,00,00,00 "Disconnect"=hex:01 "SyncDataXfer"=hex:00 I noticed that the branch related to my CD burner has the following supplementary value : "IDEMaster"=hex:01. Don't know if that's of any meaning ? I tried to manually edit this value with Regedit to force a "01" instead of "00". The result was negative.

Hi to all W98 users ! I discovered this forum while looking for a solution to activate the DMA for a Samsung DVD drive in Windows 98. My computer is based on a ABIT BE-6 motherboard (2 UltraDMA/33 and 2 UltraDMA/66 IDE bus), a Pentium III (500 MHz) processor and 192 Mb of SDRAM. I already have two HDDs and a Sony CD-ROM burner on that machine. They all work perfectly fine in DMA mode. For example, I can burn CD-R at 16x speed on the Sony drive without problems. Recently, I decided to add a DVD burner on this configuration and I bought a Samsung SH-S222A. The label on the box claims it supports PIO 4, UDMA 2 and UDMA 4 modes. I thought it would be perfect... but I immediately noticed something was wrong : the burning speed of a simple CD-R was ridiculously low and the activity of the processor reached always 100% ! I knew that such an issue could be induced by the lack of DMA mode and I tried to activate it in the device manager. However, despite all my attempts, I couldn't manage to activate the DMA mode in the Device Manager. I found a lot of advices and tricks on Microsoft support site, on MDGx.com and at last (but not least !) on this forum, but none of them worked for me. I checked that the test described on this Microsoft page returns 00, which confirms that the drive effectively supports DMA mode. At first, I connected it in slave mode on the same IDE connector (UltraDMA/33) than my CD burner : no DMA. Then, I tried to let it alone in master mode on the same connector : no DMA. After that, I put it on the UltraDMA/66 bus (with or without a HDD on the same connector) : no DMA (there is no DMA box to check in this configuration, but the transfert rate remained very low). I also tried to edit the MSHDC.INF + DISKDRV.INF files for the IDE drivers, following the procedure given on the MDGx site, but without success. So, as I don't have any more ideas of what could be the remedy for my problem, I thought that one of the W98 specialists of the forum could have an suggestion ? Thanks in advance.