This is a"LEGACY"SEAGATE Medalist ST34311A 4.3 GB 5400 RPM Ultra ATA/66 3.5" Internal IDE Hard Drive.
Purpose:When installed in a desktop computer, thisInternal IDE Hard Drive provides storage for all your data.
Key Features:

• Desktop PC Compatible
• Ultra DMA Mode 4 Support provides amaximum data transfer rate of 66.6 MB/sec
• PIO Mode 4 Support allowsincreased programmed input/output within the hard drive
• Read & Write Multiple Command Support with error correction algorithms
• S.M.A.R.T. Drive Monitoring & Reporting Support
• SeaShield drive cover shields against electrostatic discharge (ESD)
• Rubber Insulation provides for quiet operation & non-operating shock protection
• Non-Operating Shock Protection: 300 G's
• Auto Detection of Master/Slave Drives when using cable select
• Low power consumption
  
• 1x 4-Pin Molex Power Connector
• 1x 40-Pin Flat Ribbon IDE/PATA Drive Connector
• 1x 2-Pin Rear Drive Selector Jumper (Master, Slave, Master w/non ATA Slave, Cable Select)
• Bytes Per Sector: 512
• Default Read/Write Heads: 15
• Default Cylinders: 8,944
• Default Sectors Per Track: 63
• Drive Capacity: 4.3 GB
• Data Transfer Rate: 66.6 MB/sec
• Form Factor: 3.5"
• Interface Type: Ultra ATA/66
• Memory Buffer Size: 256 KB
• Physical Read/Write Heads: 2
• Physical Discs: 1
• Rotational Speed: 5400 RPM
• Seek Time: 10.5 msec (Read), 11.5 msec (Write)
• MTBF: 400,000 hours

Dimensions: 4"(W) x 1"(H) x 5.8"(D)Weight: 1 lb, 3.2 ouncesColor: Silver aluminum enclosure with SeaShield black cover.Condition:"USED"and is in Excellent Condition ! Very Clean, as shown in actual photos.Includes: 1x SEAGATE Medalist ST34311A 4.3 GB 5400 RPM Ultra ATA/66 3.5" Internal IDE Hard Drive.Testing: Tested Product, and it is fully operational.
NOTE:IDE CableNOT includedMolex Cable NOT includedJumper NOT includedDrive mounting screws NOT includedManual NOT included