HP Pavilion t350.uk Desktop PC - Manual (Page 118)

110 user’s guide
5 Remove the cables from the back of the hard drive.
MASTER
SLA
VE
To CPU
replacing the preinstalled hard drive
1 Make sure the release tab on the hard drive bracket is in the unlocked position
before you insert the new hard drive.
2 Attach the IDE and power supply cables to the back of the hard drive.
WARNING: Make sure the IDE cable end labelled Master is
connected to the primary hard drive. If you have a second hard
drive, make sure the IDE cable labelled Slave is connected to the
second hard drive. If the IDE cable is not connected correctly, the PC
will not be able to locate the hard drives and data may be lost.