Seagate ST3146855LW 146.8GB 15K RPM 16MB 68-Pin Ultra320 SCSI 3.5-Inch Cheetah 15K.5 Hard Drive

The Seagate ST3146855LW is a high-performance 146.8GB enterprise-class hard drive from the Cheetah 15K.5 series, designed for legacy servers, workstations, storage systems, and industrial equipment that require a native 68-pin Ultra320 SCSI hard drive.

With a 15,000 RPM spindle speed, 16MB cache, and 3.5-inch low-profile form factor, this drive is ideal for maintaining older mission-critical systems where exact SCSI interface compatibility is required. The ST3146855LW is best suited for internal 68-pin SCSI environments and legacy systems that cannot use SATA, SAS, or 80-pin hot-swap SCA drives.

Technical Specifications

• Brand: Seagate
• Model: ST3146855LW
• Series: Cheetah 15K.5
• Capacity: 146.8GB
• Form Factor: 3.5-inch LFF
• Drive Height: Low-profile 1-inch class
• Interface: Ultra320 SCSI
• Connector: 68-Pin HD68 SCSI
• Drive Type: Internal Enterprise Hard Disk Drive
• Spindle Speed: 15,000 RPM
• Cache: 16MB
• Sector Size: 512 bytes
• Maximum Interface Transfer Rate: 320MB/s
• Average Read Seek Time: 3.5ms
• Average Write Seek Time: 4.0ms
• Average Latency: 2.0ms
• Dimensions: 26.11mm x 101.85mm x 146.99mm
• Power Requirements: +5V / +12V
• Compatible Bay Type: Internal 3.5-inch SCSI drive bay
• Not Compatible With: SATA, SAS, IDE/PATA, 80-pin SCA backplanes without proper adapter support

Interchangeable / Replacement Part Numbers

ST3146855LW, 9Z2005-005, 9Z2005, 9H2004-001, 9BJ13-305

✅ Confirmed Compatibility

Please note that the following list is not exhaustive. Compatibility depends on your system's specific configuration. It's essential to verify compatibility with your system or enclosure manufacturer prior to installation.

✔️ Seagate Cheetah 15K.5 Series: ST3146855LW, 9Z2005-005, 9Z2005, 9H2004-001, 9BJ13-305
✔️ HP / HPE ProLiant Servers: ProLiant DL360, DL360 G2, DL360 G3, DL360 G4, DL380, DL380 G2, DL380 G3, DL380 G4, DL560, DL580, DL580 G2, ML350, ML350 G2, ML350 G3, ML350 G4, ML370, ML370 G2, ML370 G3, ML370 G4, ML530, ML570, legacy ProLiant systems with internal 68-pin Ultra320 SCSI support
✔️ HP / HPE Storage Systems: StorageWorks SCSI storage enclosures, legacy MSA SCSI storage systems, internal Ultra320 SCSI drive cages, 3.5-inch SCSI storage chassis requiring 68-pin LVD Ultra320 drives
✔️ Dell PowerEdge Servers: PowerEdge 1400, 1600SC, 1650, 1750, 1800, 1850, 1900, 2500, 2550, 2600, 2650, 2800, 2850, 2900, 4600, 6600, 6650, 6800, 6850, legacy PowerEdge systems with compatible 68-pin internal SCSI controllers or supported SCSI drive adapters
✔️ Dell PowerVault Storage Systems: PowerVault 200S, 201S, 210S, 211S, 220S, 221S, 755N, 770N, 775N, legacy SCSI storage systems with compatible internal 68-pin SCSI drive support
✔️ IBM / Lenovo xSeries Servers: xSeries 220, xSeries 225, xSeries 226, xSeries 230, xSeries 232, xSeries 235, xSeries 236, xSeries 255, xSeries 260, xSeries 335, xSeries 345, xSeries 346, xSeries 365, xSeries 366, legacy xSeries systems with compatible Ultra320 SCSI support
✔️ IBM eServer / System x / Netfinity Systems: Netfinity 5000, Netfinity 5100, Netfinity 5600, Netfinity 6000R, eServer xSeries SCSI configurations, System x legacy SCSI platforms using 3.5-inch Ultra320 SCSI drives
✔️ Sun / Oracle Workstations & Servers: Sun Ultra, Sun Blade, Sun Fire, Netra, and legacy SPARC / Ultra320 SCSI systems configured for 3.5-inch 68-pin internal SCSI hard drives
✔️ Supermicro Servers & Workstations: Supermicro legacy server boards, rackmount chassis, tower servers, and industrial systems with onboard or add-in 68-pin Ultra320 SCSI controllers
✔️ Intel Server Platforms: Intel Server Chassis and Server Board platforms with integrated or add-on Ultra320 SCSI controllers supporting 3.5-inch 68-pin SCSI hard drives
✔️ Industrial / Embedded Systems: CNC controllers, medical systems, manufacturing equipment, test equipment, automation systems, and legacy industrial computers requiring a 146GB-class 68-pin Ultra320 SCSI hard drive

☑️ Key Features

☑️ 146.8GB enterprise hard drive designed for legacy SCSI systems.
☑️ 15,000 RPM spindle speed for fast seek performance in older server and workstation environments.
☑️ 16MB cache helps improve data handling for legacy enterprise workloads.
☑️ Native 68-pin Ultra320 SCSI interface for systems that require parallel SCSI compatibility.
☑️ 3.5-inch low-profile form factor fits many legacy internal SCSI bays and chassis.
☑️ Ideal for server repair, workstation restoration, industrial equipment maintenance, and legacy storage replacement.
☑️ Useful for systems where SATA or SAS drives are not supported.
☑️ Designed for high-duty enterprise environments where exact drive interface compatibility is critical.

⚙️ Fit Notes

• This drive uses a 68-pin Ultra320 SCSI connector.
• This is not a SATA, SAS, IDE, or 80-pin SCA hot-swap drive.
• Many HP, Dell, and IBM servers used vendor-specific hot-swap trays, caddies, backplanes, or firmware-specific drive assemblies.
• If your system uses an 80-pin SCA hot-swap backplane, this drive may require the correct adapter or may not be the correct replacement.
• Always match your original drive model, connector type, capacity requirements, and system configuration before ordering.
• For data recovery use, matching the exact model number, firmware, site code, and label details may be required.
• For general replacement use, confirm that your controller supports 68-pin Ultra320 SCSI 3.5-inch hard drives.