Separate the represented 1C, 2C, 4C and 4C+ physical connector forms from the alternate logical assignments an implementation may use.
Question this page answers
What can the 1C / 2C / 4C / 4C+ connector form tell me, and what still depends on the exact EDSFF implementation?
What the current evidence can establish
Use the canonical record and engineering sidecar to identify the represented physical variation, documented contact count and bounded differential-pair structure.
Do not turn the connector form into one universal logical pin map. The current engineering evidence deliberately preserves alternate assignment and implementation boundaries.
The implementation-specific logical assignment and supported functions
Stop line.
A documented EDSFF connector form is not by itself a device compatibility, protocol, lane-use or wiring verdict.
Existing evidence, stronger route.
These V52 guides reorganize facts and explicit unknowns already present in the atlas. They add no new hardware claim, universal pinout, measured performance result, compatibility verdict, installation approval or fabrication approval.
Page scope: A documented EDSFF connector form is not by itself a device compatibility, protocol, lane-use or wiring verdict.
Assessment 2026-10-22 · earliest scheduled source review 2027-01-04. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.
SNIA · Standards-organization domain · inspected 2026-10-06 · due 2027-01-04
Within inspection window
Scoped support: Draft REF-TA-1012 Rev 0.0.2 identification reference for the SFF-TA-1002 1C connector variation; used only for the stated contact-count/form fact.
Not established / limitations: Source-backed identification does not establish universal wiring, protocol generation, device compatibility, safe installation or fabrication approval.
SNIA · Standards-organization domain · inspected 2026-10-06 · due 2027-01-04
Within inspection window
Scoped support: Draft REF-TA-1012 Rev 0.0.2 identification reference for the SFF-TA-1002 2C connector variation; used only for the stated contact-count/form fact.
Not established / limitations: Source-backed identification does not establish universal wiring, protocol generation, device compatibility, safe installation or fabrication approval.
SNIA · Standards-organization domain · inspected 2026-10-06 · due 2027-01-04
Within inspection window
Scoped support: Draft REF-TA-1012 Rev 0.0.2 identification reference for the SFF-TA-1002 4C connector variation; used only for the stated contact-count/form fact.
Not established / limitations: Source-backed identification does not establish universal wiring, protocol generation, device compatibility, safe installation or fabrication approval.
SNIA · Standards-organization domain · inspected 2026-10-06 · due 2027-01-04
Within inspection window
Scoped support: Draft REF-TA-1012 Rev 0.0.2 identification reference for the SFF-TA-1002 4C+ connector variation; used only for the stated contact-count/form fact.
Not established / limitations: Source-backed identification does not establish universal wiring, protocol generation, device compatibility, safe installation or fabrication approval.
Storage Networking Industry Association (SNIA) · Standards-organization domain · inspected 2026-10-06 · due 2027-01-04
Within inspection window
Scoped support: Published reference context for SFF-TA-1002 1C/2C/4C/4C+ contact counts and GSSGSSG differential-pair structure; V51 does not reproduce the copyrighted assignment table or normalize one universal logical pinout.
Not established / limitations: Alternate assignments vary by implementation context; connector variation alone does not establish lane enablement, power/sideband wiring, platform support or fabrication dimensions.
Locator: Sections 2–3 and Table 3-1: connector variations, contact counts, differential-pair capacity and alternate assignment contexts
Trace 8 claims to their source records
C291A · P291
SNIA REF-TA-1012 identifies the SFF-TA-1002 1C connector variation as a 56-contact connector with up to 18 differential pairs of data signals.
Claim scope: V50 identification fact only; no wiring, protocol compatibility, installation or fabrication approval is inferred.
SNIA’s published reference describes the SFF-TA-1002 1C variation as 56 contacts with capacity for up to 18 differential data pairs in a GSSGSSG contact pattern.
Claim scope: Engineering identification context only; alternate assignment tables are implementation-specific and V51 does not normalize a universal logical pinout.
SNIA’s published reference describes the SFF-TA-1002 2C variation as 84 contacts with capacity for up to 26 differential data pairs in a GSSGSSG contact pattern.
Claim scope: Engineering identification context only; alternate assignment tables are implementation-specific and V51 does not normalize a universal logical pinout.
SNIA’s published reference describes the SFF-TA-1002 4C variation as 140 contacts with capacity for up to 44 differential data pairs in a GSSGSSG contact pattern.
Claim scope: Engineering identification context only; alternate assignment tables are implementation-specific and V51 does not normalize a universal logical pinout.
SNIA’s published reference describes the SFF-TA-1002 4C+ variation as 168 contacts with capacity for up to 52 differential data pairs in a GSSGSSG contact pattern.
Claim scope: Engineering identification context only; alternate assignment tables are implementation-specific and V51 does not normalize a universal logical pinout.
Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.
