Apple Xserve (Early 2008) DIY Procedure for Enclosure - Manual (Page 8)

Xserve Hard Drive Replacement Instructions 2
or writing to the drive. To avoid losing data, never remove a drive when the lower LED is
blinking.
If the hard drives are in the locked position (the yellow security LED on the front panel is on), 1.
use the Allen key that came with the server to unlock them.
Warning: Drives must be in the unlocked position before you attempt to remove a drive.
If a drive is locked, pulling on the drive to remove it could damage the drive handle.
Wait for the lower LED on the front of the drive to stop blinking. 2.
Removing the Installed Hard Drive
Make sure the drive being replaced is not in use by any application and that removing it will 1.
not disrupt the RAID scheme in use.
Press the handle on the front of the drive module so the handle pops out. 2.
Wait for the upper LED on the drive to go out. Then grasp the drive handle, and pull the 3.
drive module out of the server.