https://community.hpe.com/t5/disk/adding-hard-drive/m-p/2605406#M1681 are you seeing anything in the disk administrator? such as unpartitioned space that is the size of the new drive? cause while ACU will add it to the existing array depending on your array controller (which you dont seem to have had a problem with) it will still show up in disk admin as unused space...you need to format and partition that space for use.. Mon, 12 Nov 2001 00:00:00 GMT Mark Cloutier 2001-11-12T00:00:00Z https://community.hpe.com/t5/disk/adding-hard-drive/m-p/2605405#M1680 I have added an 18.2gb ultra2 hard drive to my Proliant 3000 server with NT 4 installed. I have ran the ACU which has expanded the Array & added the drive to the array. But I am unable to see the extra space in Disk Administrator. What have I missed out? or what do I need to do next? Thu, 01 Nov 2001 00:00:00 GMT https://community.hpe.com/t5/disk/adding-hard-drive/m-p/2605405#M1680 Ayman Altounji 2001-11-01T00:00:00Z https://community.hpe.com/t5/disk/adding-hard-drive/m-p/2605406#M1681 are you seeing anything in the disk administrator? such as unpartitioned space that is the size of the new drive? cause while ACU will add it to the existing array depending on your array controller (which you dont seem to have had a problem with) it will still show up in disk admin as unused space...you need to format and partition that space for use.. Mon, 12 Nov 2001 00:00:00 GMT https://community.hpe.com/t5/disk/adding-hard-drive/m-p/2605406#M1681 Mark Cloutier 2001-11-12T00:00:00Z