PartsTable
Technical Data Sheet
PartsTable / STORAGE_HDD / 55Y
55Y ✓ Verified by PartsTable
— · STORAGE_HDD · 2.5_SAS_HDD
WHAT YOU NEED TO KNOW
SAS HDD backplane accepts SATA drives, SATA backplane does NOT accept SAS 2.5" SAS HDDs come with or without carrier/tray — ALWAYS ASK
ALWAYS confirm carrier/tray PN — server-specific trays vary by generation
PRODUCT OVERVIEW

IBM 571GB 10K RPM SAS SFF-1 DISK DRIVE IBMi. Key specifications include material: RUBBER FIRST PLY, design_type: DRY, coolant_type: AIR, inlet_location: CENTRALLY IN END SECTION, muffler_design: STRAIGHT THROUGH, overall_length: 26.000 INCHES NOMINAL IN. The unit ships in a SFF form factor suitable for standard rack-mount installations.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2990-00-142-0233, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
STORAGE_HDD→ 2.5_SAS_HDD→ SFF BAY→ 55Y
NSN: 2990-00-142-0233
FSC: 2990
CAGE: 77432 — INTERNATIONAL PARTS CORP DIV OF MIDAS-INTERNATIONAL CORP (USA)
SPECIFICATIONS
materialRUBBER FIRST PLY
design_typeDRY
coolant_typeAIR
inlet_locationCENTRALLY IN END SECTION
muffler_designSTRAIGHT THROUGH
overall_length26.000 INCHES NOMINAL IN
inside_diameter5.500 INCHES NOMINAL FIRST END IN
outlet_locationCENTRALLY IN END SECTION
overall_diameter5.000 INCHES NOMINAL IN
operating_positionUNIVERSAL
inlet_inside_diameter2.500 INCHES NOMINAL SINGLE INLET IN
outlet_inside_diameter1.750 INCHES NOMINAL FIRST OUTLET IN
NSN2990-00-142-0233
COMPONENT DIAGRAM
LABEL 571GB HDD SAS 12Gb/s 69.85 mm (2.75") 100.0 mm SFF HDD — MECHANICAL Spinning disk, hot-swap SAS 12Gb/s — Dual-port 571GB | 7200 / 10K / 15K RPM FORM FACTOR — SFF Hot-swap, carrier-specific MOUNTING — 4x M3 bottom Standard SFF screw pattern TITLE HDD DRIVE PN 55Y MFR IBM 571GB 10K RPM SAS SFF-1 DISK DRIVE I
KEY FEATURES
•
SFF Form Factor
•
571GB Capacity
•
10K RPM Speed
•
INLET PROJECTION LENGTH: 2.188 INCHES NOMINAL SINGLE INLET IN
•
OUTLET PROJECTION LENGTH: 1.813 INCHES NOMINAL FIRST OUTLET IN
•
INLET INSIDE DIAMETER: 2.500 INCHES NOMINAL SINGLE INLET IN
•
OUTLET INSIDE DIAMETER: 1.750 INCHES NOMINAL FIRST OUTLET IN
•
MATERIAL: STEEL LOCATION NOT OTHERWISE SPECIFIED
•
INLET LOCATION: CENTRALLY IN END SECTION
•
OPERATING POSITION: UNIVERSAL
TYPICAL APPLICATIONS
  • Enterprise storage arrays and SANs
  • Direct-attached storage (DAS) expansion
  • Database tier storage (OLTP, OLAP)
  • Virtual machine datastore expansion
  • Backup-to-disk and disaster recovery targets
  • Content delivery and media streaming storage
TECHNICAL CHARACTERISTICS (FLIS)
INLET PROJECTION LENGTH2.188 INCHES NOMINAL SINGLE INLET IN
OUTLET PROJECTION LENGTH1.813 INCHES NOMINAL FIRST OUTLET IN
INLET INSIDE DIAMETER2.500 INCHES NOMINAL SINGLE INLET IN
OUTLET INSIDE DIAMETER1.750 INCHES NOMINAL FIRST OUTLET IN
MATERIALSTEEL LOCATION NOT OTHERWISE SPECIFIED
INLET LOCATIONCENTRALLY IN END SECTION
OPERATING POSITIONUNIVERSAL
DESIGN TYPEDRY
MUFFLER DESIGNSTRAIGHT THROUGH
COOLANT TYPEAIR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
921021Interchangeable
interchangeable cross-reference
interchangeable
21021Interchangeable
interchangeable cross-reference
interchangeable
205-4510947-49Interchangeable
interchangeable cross-reference
interchangeable
55YInterchangeable
interchangeable cross-reference
interchangeable
TT-I-600Interchangeable
interchangeable cross-reference
interchangeable
7510-00-224-7676Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 55Y?
55Y is a IBM 571GB 10K RPM SAS SFF-1 DISK DRIVE IBMi. It is classified as a STORAGE_HDD (2.5_SAS_HDD).
What parts can replace 55Y?
There are 28 known substitutes for 55Y: 921021, 21021, 205-4510947-49 and 25 more. Substitute compatibility should be verified for your specific system.
Is 55Y still available?
55Y is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026