windows NT

Not that I have worked with that card before but if you found some documentation I would bet you have to delete the partition and then add the additional drive. Raid 5 will not let you automatically expand by adding a drive through Winnt and would believe it is the case even with a controller card.

Well, with hardware RAID-5, adding another hard drive just means you get more free space to play around with. It doesn't automatically proportionally extend the current partition sizes. I don't know your RAID card, but it should have a menu-based utility to add the drive to the current array (I have used IBM and Compaq's utilities with no problem). After the array generates parity info on the new drive, use NT's Disk Administrator. There should be 9GB of free space. While holding down Control key, highlight the D: partition and the Free Space. Then choose to make a Volume Set from the Parition menu. It may take some time, but that should be it...
Hope it helps.

Hi guys Thanks for you answers. I was finally able to get it done. I made a full backup of the PDC. I then pull one hot pluggabe hard drive from each of my citrix servers.I bought another 9.1 GB hard drive. I then brought down the PDC, remove the 3 drives and replace them with the new drive and the 3 drives from the citrix servers. i then ran compaq erase utility and the arrray config utility. I did a fresh install of NT 4.0, created the original size C partition.I was now able to expand the D partition with the remaining space on the new array configuration. I then use disk admin. utility to create primary partitions. I then restore the original C partition from tape backup to the original winnnt directory and then restore the original data to the original D partition which was now extended. I then verified that everyone can authenticate and can access their data files.

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