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These establish the advertised specification of the exact capacity, rather than the result of an independent test performed for this guide. That distinction matters when comparing the numbers with review excerpts and benchmark databases: the sources describe different kinds of evidence and cannot automatically be merged into a single performance verdict. The strongest starting point is therefore the model identifier and physical interface, followed by the workload conditions behind each speed report. This guide keeps manufacturer ratings separate from attributed observations and leaves unresolved conditions visible."}],"section_id":"section_1","section_type":"overview"},{"heading":"Performance limits","paragraphs":[{"claim_ids":["clm_limit_v7"],"kind":"factual","paragraph_id":"p2","text":"The most important caution is the review excerpt reproduced by DVHardware. It attributes direct-write performance between 10MB/s and 20MB/s to the BX500 4TB. DVHardware is presenting another review's findings, not documenting its own controlled measurement. The original hands-on article was located, but its publisher did not permit a native snapshot; the detailed test setup and original results are consequently not treated as verified measurements in this package. The permitted excerpt is still a reason to investigate long continuous writes before choosing the drive for that workload. It is not enough to specify exactly when a slowdown begins, how long recovery takes, or whether a particular firmware and host reproduce it. 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The reading figure differs markedly from the manufacturer specification, while the source does not establish the cache and host conditions needed to interpret that difference as actual uncached drive throughput. The appropriate treatment is an attributed database report with unresolved context, not a verified improvement over the advertised SATA specification. This guide does not infer a hardware revision, special operating mode or faster interface from that number. It also does not use the result to promise a particular copy time. To make a defensible comparison, a future test would need to identify the exact drive capacity, host, workload and caching behavior and explain what the benchmark is measuring. 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A useful future comparison would hold the method and conditions constant and separate short benchmark behavior from longer transfers. With the present evidence, neither a performance ranking nor an exact advantage over another product is justified. The remaining conclusion is narrower: the database exists, but its number needs methodological context before becoming a recommendation."}],"section_id":"section_v7_pass","section_type":"comparison"},{"heading":"Endurance and warranty are different from measured lifespan","paragraphs":[{"claim_ids":["clm_capacity_v7","clm_tbw_v7","clm_warranty_v7"],"kind":"factual","paragraph_id":"p_warranty","text":"The published endurance rating for the 4TB model is 1000TB written. The datasheet describes a limited three-year warranty that ends earlier if the published maximum TBW is reached according to SMART data. These are a manufacturer's rating and contractual limits, not an independently measured lifespan for every individual drive. They do not justify predicting an exact failure date or declaring unlimited suitability for heavy writes. For planning, distinguish how much data a workload writes from whether its transfer speed is acceptable: an endurance allowance does not answer the sustained-performance question. The warranty wording is also not a support-end announcement or a guarantee of a particular regional service outcome. A buyer should confirm the applicable warranty terms for the actual purchase and model. This guide retains the stated conditions and avoids turning the rating into an unsupported claim about reliability or years of trouble-free use."}],"section_id":"section_v7_warranty","section_type":"maintenance"},{"heading":"Regional and energy footnotes need their qualifiers","paragraphs":[{"claim_ids":["clm_energy_v7","clm_jp_v7","clm_model_v7","clm_capacity_v7"],"kind":"factual","paragraph_id":"p_context","text":"IITSupport carries qualifiers that prevent two common overreadings of the product description. Its energy comparison concerns a 480GB BX500 and a WD10EZEX 1TB hard drive, rather than an independent measurement of this 4TB model. It therefore cannot supply an exact power-consumption result or calculated energy saving for the drive covered here. The same page explains the /JP suffix in relation to official Japanese distribution after April 2017. That regional note does not change the US product identity in this package or establish identical local warranty handling for every seller. Keep capacity-specific evidence and distribution-specific wording attached to the versions they actually describe. The practical decision remains conditional: confirm the exact model and physical fit, weigh the sustained-write caution against the intended workload, and obtain clearer test evidence where performance is decisive. No current-value ranking, power saving or regional service promise is added to fill the remaining gaps."}],"section_id":"section_v7_context","section_type":"limitations"}],"title":"Crucial BX500 4TB: evidence-led buyer guide"},"buyer_decisions":[{"check_before_buying":["Confirm exact model and host interface and dimensions.","Seek controlled exact-capacity sustained-write evidence if large continuous writes are important."],"claim_ids":["clm_capacity_v7","clm_form_v7","clm_interface_v7","clm_limit_v7"],"constraints":["A compatible SATA installation is required."],"evidence_locator_ids":["loc_v7_spec","loc_dv_limit"],"item_id":"buyer_v7_library","needs":["Large local storage library."],"price_context_ids":[],"reason":"Specifications support the storage format, but do not establish loading-time advantages or exact-host sustained behavior.","rival_revisions":[],"scope":{"country":{"state":"unknown"},"firmware":{"state":"unknown"},"hardware_revision":{"state":"unknown"},"os":{"state":"unknown"},"variant":{"state":"known","values":["CT4000BX500SSD1"]}},"title":"Consider conditionally for a large local library","topic_id":"buyer_fit","tradeoffs":["Capacity is documented; sustained writing remains a caution based on attributed review reporting."],"verdict":"conditional"}],"comparisons":[],"coverage":{"buyer_decisions":{"claim_ids":["clm_capacity_v7","clm_interface_v7","clm_limit_v7"],"reason":"Conditional library-storage suitability is grounded in capacity, SATA format and the attributed writing caution. 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That can suit a large local library in a compatible bay, but it does not establish loading times or sustained write performance.","claim_ids":["clm_capacity_v7","clm_form_v7","clm_interface_v7"],"faq_id":"faq_1","intent":"pre_purchase","question":"What is the strongest reason to consider this drive?","source_ids":["source_snapshot_9525c6209c6b231acc45689d0e056c3cb2c204cb72b27b67a2b5d0da05a59124"]},{"answer":"DVHardware reproduces a review excerpt reporting direct writes between 10MB/s and 20MB/s. It is a syndicated report, not DVHardware's own controlled test, and the original review could not be captured by the native source tool.","claim_ids":["clm_limit_v7"],"faq_id":"faq_2","intent":"limitation","question":"What is the main performance caution?","source_ids":["source_snapshot_7ce3cd67162cb49a789e223ed025137a87d7c350042a86ec9167d7ed8a8950cb"]},{"answer":"Check that your system accepts a 2.5-inch 7mm drive with SATA. The BX500's documented interface is SATA 6Gb/s. These specifications do not certify a particular laptop, console, enclosure or NAS.","claim_ids":["clm_form_v7","clm_interface_v7"],"faq_id":"faq_3","intent":"compatibility","question":"What should I check before installation?","source_ids":["source_snapshot_9525c6209c6b231acc45689d0e056c3cb2c204cb72b27b67a2b5d0da05a59124"]},{"answer":"The 4TB model's published endurance is 1000TB written. The limited warranty ends at three years or the published TBW threshold, whichever comes first according to SMART data. This is a rating and warranty limit, not a promise that an individual drive will last a particular number of years.","claim_ids":["clm_capacity_v7","clm_tbw_v7","clm_warranty_v7"],"faq_id":"faq_4","intent":"maintenance","question":"What do the endurance and warranty figures mean?","source_ids":["source_snapshot_9525c6209c6b231acc45689d0e056c3cb2c204cb72b27b67a2b5d0da05a59124"]}],"ownership_costs":[],"price_contexts":[],"rivals":[{"asin":"B0BXX1JJH8","claim_ids":["c2"],"claims":[{"claim_id":"c2","predicate":"product.sequential_write","spec_origin":"lab_measured","value":{"kind":"number","unit":"B/s","value":1500000000}}],"product_public_id":"product_public_642a003a77df45908d8ef8195d97a420","rival_id":"rival_3","title":"Samsung 990 PRO 2TB PCIe 4.0 NVMe M.2 Internal SSD (MZ-V9P2T0B/AM)"}],"usage_scenarios":[{"assessment":"conditional","claim_ids":["clm_capacity_v7","clm_form_v7","clm_interface_v7","clm_limit_v7"],"gap_reason":null,"limitations":["The syndicated review excerpt warns about slow direct writes.","Controlled uncached performance is not established by the accepted sources."],"scenario_id":"scenario_1","situation":"A buyer needs nominal 4TB storage in a system with a compatible 2.5-inch SATA bay, with mostly reads and occasional large transfers.","title":"Large local library"}]}},"source_schema_version":"product-research-package-v7","sources":[{"number":1,"publisher":"Evergreen Computer","title":"Crucial BX500 CT4000BX500SSD1","url":"https://evergreencomputer.com.hk/crucial-crucial-bx500-4000gb-2-5-ct4000bx500ssd1.html"},{"number":2,"publisher":"DVHardware","title":"Crucial BX500 4TB 2.5 inch SSD review","url":"https://www.dvhardware.net/review/104831"},{"number":3,"publisher":"DVHARDWARE","title":"Crucial BX500 4TB 2.5 inch SSD review","url":"https://www.dvhardware.net/review/104831"},{"number":4,"publisher":"Nero","title":"CT4000BX500SSD1 Benchmarks","url":"https://score.nero.com/ssd-hdd-benchmark/ct4000bx500ssd1"},{"number":5,"publisher":"PassMark Software","title":"CT4000BX500SSD1 Benchmark performance","url":"https://www.harddrivebenchmark.net/hdd.php?hdd=CT4000BX500SSD1&id=40846"},{"number":6,"publisher":"IIT Support","title":"Crucial CT4000BX500SSD1 BX500 4TB","url":"https://iitsupport.com/products/crucial-ct4000bx500ssd1-bx500-4tb-2-5-internal-sata-ssd-540r-500w-mb-s-3-year-warranty"},{"number":7,"publisher":"PassMark Software","title":"CT4000BX500SSD1 Benchmark performance","url":"https://www.harddrivebenchmark.net/hdd.php?hdd=CT4000BX500SSD1&id=40846"},{"number":8,"publisher":"Nero","title":"CT4000BX500SSD1 Benchmarks","url":"https://score.nero.com/ssd-hdd-benchmark/ct4000bx500ssd1"},{"number":9,"publisher":"Micron / Crucial; mirrored by Simms","title":"Crucial BX500 SSD product flyer","url":"https://www.simms.co.uk/PDFS/Products/SSD/crucial_bx500_datasheet.pdf"}]}