I've installed a second HD in my Dell 9150, it's is recognized in the BIOS, but I have a problem accessing the HD. When I go to my computer icon and open it, it is not present.

Hi Dear,

As you have said, that hard drive is recognized at bios level. Then the primary problem seem to be that it might not have been activated.

If you are using windows XP then go start menu===>>> my computer icon===>>> right click on it===>>> go to properties ===>>> go Hardware ===>>> go to device manager. Check there if both the hard drive are shown or not.

If it is present then go start menu===>>> my computer icon===>>> right click on it===>>> click on manage ===>>> disk management===>> > there you can see your newly hard drive installed. Format it once and then activate it here.

hence doing this step you should be able to access your newly installed disk.

For windows Vista. Do the same procedure.

Hope this will fix your problem.

If not please do write to us again, we will be pleased to solve your problem.

Have a nice day.

If it's new, it probably wasn't formatted.

Go to computer management. Start-> Programs -> Administrative Tools -> Computer Management

Select Disk Management you will see all your connected drives on the lower right pane (including CD-drives). Disk 0 should be online and healthy (this is your C: Drive). Disregard your CD-Drives, and the remaining will be your new drive you just put in. Right-click it and select format. At this point you can choose a drive letter (just leave it default) and select the File System type.
If you are using Linux as 2ndary OS use FAT32, otherwise use NTFS for complete windows computer. Follow any other prompts and you should have a healthy, online drive when you are finished. Hope this helps, Best Regards,

Did you setup both units as slave and master or not?