Amator2b, Yes, you can use this drive as a replacement drive. However, due to previously existing RAID meta data on the drive, it will show in a foreign configuration. In order to clear this foreign configuration, enter the controller BIOS using Ctrl+R utility and go to the foreign column of the VD.  Here you will find an option to clear this configuration. You can also clear the foreign configuration via OMSA software, if installed. Once cleared, allow the drive to rebuild into the array.
Newbie question here: I have a server with SAS drive failure predicted and I hope to retire that server within a month. At the same time I have another 2950 that have been retired recently and (if possible) I'd like to re-use a drive from it for the short period of time that I need it to avoid unnecesary spending on a drive that I won't need anytime soon. Can I just use any identical drive from the retired system to replace the failing drive? The drive would contain some RAID configuration from the other system as well as data, which all (I hope) would get overwritten when I plug in the drive and rebuild the array.
Should I replace a disk with identical disk from another server?