Hi, I recently bought a second hand Dell PowerEdge 2450 server for a replacement to a failed server. My Hardware configuration as follow: -Pentium CPU 633 -1GB Ram -2 units ST318452LC Hard disk on Drive 0 and Drive 1 -Adaptec Aic-7899 Scsi Controller My installation process: - Dos 6.22 fdisk. - Assign 250MB FAT partition. Set to Active - Format C:/ S - System reboot into C drive without error. - Insert Warp 4 ins. in A:drive, Reboot - Insert Warp 4 1st and 2nd ins. disks - select advance installation. - after a long wait, OS/2 fdisk screen displayed but without any partition visible. - Several attempts, sometime error message displayed "Fdisk is unable to read the MBR on drive 1, the drive may be unusable. - Removed Warp 4 installation disks from drive and reboot. Successfully boot into C: - Win XP can be installed on this drive Before this I've succesfully installed several copies of Warp 4 on IDE hard disk. I am using danis506.add version 1.7. Do i need to install the Aic-7899 driver for the installation. Why Dos 6.22, Window XP can be successfull fdisk, format except OS/2? Would appreciate very much if someone can guild me trough this difficult period. TIA

After the error message, you should be able to continue to see what FDISK is seeing. What drives does it see, and what partition information does it see? Also, did you install something to allow picking which partition to boot off of? If not, you wish to install BootManager first, create the other partitions, install DOS and OS/2 on primary partitions (DOS usually requires it... OS/2 doesnt). Also, on certain SCSI hardware, OS/2 must be installed in the first 8GB of the drive... (ie: the boot partition must be smaller than 8GB, and reside in the first 8GB). OS/2 Warp 4 can see, partition and use the rest of the disk for additional partitions. And yes, if you do not have the appropriate SCSI drivers installed (assuming these are SCSI drives you are installing to), OS/2 will not operate (or even see) the drives. If that is the case, it may be detecting an MSD slot (card reader) and not getting proper partition information (because it is empty)... thus the error could also be caused by that. If that is the case, you need to put the driver for the SCSI card on the floppies (instructions on how to do this come with OS/2), modify the config.sys file to add the driver you need to load, and change SETCOPYFROMFLOPPY=0 to =1. Post a little more info and let me know how it goes... I'll see if I can be of more assistance... What version of Warp are you using? -Robert

Hi Robert, Thank you very much for your response. I've managed to get this solved. Adaptec Technical support pointed me to the correct hard disk driver. Best regards