{"product_id":"asr-5405-adaptec-pcie-x8-4-port-sas-raid-controller-256mb-cache","title":"ASR-5405 Adaptec PCIe x8 4-Port SAS RAID Controller - 256MB Cache","description":"\u003cp\u003eOur review of the ASR-5405 Adaptec PCIe x8 4-port SAS RAID controller finds it best suited for small server upgrades and workstation users who need reliable hardware RAID without complexity. The bottom line: this controller delivers straightforward RAID functionality and a dedicated 256MB cache to improve write performance on SATA\/SAS arrays, making it a practical option when replacing or adding a discrete RAID card. It is a no-frills, hardware-focused solution for those who prioritize compatibility and predictable behavior over advanced modern features.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCI Express x8 interface:\u003c\/strong\u003e Provides a wide host bus lane to support multiple drives with sustained throughput for typical server workloads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour SAS ports:\u003c\/strong\u003e Allows connection of up to four direct-attached SAS or SATA drives for RAID configurations without external expanders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e256MB onboard cache:\u003c\/strong\u003e Improves write performance and helps smooth burst activity during rebuilds and random write operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware RAID support:\u003c\/strong\u003e Offloads RAID processing from the CPU to maintain host performance under sustained I\/O.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew bulk pack condition:\u003c\/strong\u003e Arrives as new in bulk packaging, suitable for system builders and IT shops stocking replacement parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe ASR-5405 is aimed at IT professionals, system integrators, and small business owners who need a dependable, entry-level hardware RAID controller for legacy or mid-life servers. It suits environments where simple RAID levels and predictable performance matter more than the latest caching algorithms or enterprise software suites.\u003c\/p\u003e\n\u003cp\u003eUsers who need cutting-edge features like multi-gigabit NVMe support, large battery-backed caches, or vendor-managed cloud integration should look elsewhere. Likewise, those needing extensive warranty-backed enterprise deployments may prefer a current-generation controller with advanced firmware and support options.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReliable hardware RAID offload that frees the host CPU for other tasks.\u003c\/li\u003e\n\u003cli\u003eDedicated 256MB cache that helps improve write throughput and rebuild responsiveness.\u003c\/li\u003e\n\u003cli\u003eFour SAS ports give straightforward expandability for small arrays without external hardware.\u003c\/li\u003e\n\u003cli\u003eNew bulk-pack condition is practical for budget-focused purchases and replacements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLimited to four ports and mid-level cache size, so it is not ideal for large arrays or high-density storage enclosures.\u003c\/li\u003e\n\u003cli\u003eLacks modern NVMe support and advanced management features found on newer controllers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct name\u003c\/td\u003e\n\u003ctd\u003eASR-5405 Adaptec 4-Port SAS RAID Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003ePCI Express x8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePorts\u003c\/td\u003e\n\u003ctd\u003e4 SAS ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOnboard cache\u003c\/td\u003e\n\u003ctd\u003e256MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm\u003c\/td\u003e\n\u003ctd\u003eAdd-in card, internal I\/O card\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackaging\u003c\/td\u003e\n\u003ctd\u003eNew bulk pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe ASR-5405 is a solid, cost-conscious RAID controller for small servers and workstations that need dependable hardware RAID and a modest 256MB cache. It represents good value when upgrading or replacing a discrete controller on older platforms, but those seeking modern features or large-scale expansion should consider more recent models.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this card support SATA drives?\u003c\/strong\u003e\u003cbr\u003eYes; the four SAS ports are compatible with SAS and SATA drives when connected directly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the onboard 256MB cache battery-backed?\u003c\/strong\u003e\u003cbr\u003eThe specification notes a 256MB cache but does not indicate a battery backup; expect standard volatile cache behavior unless an external module is supplied.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it fit in any server?\u003c\/strong\u003e\u003cbr\u003eIt uses a PCIe x8 interface and fits in slots that accept x8 or x16 cards; verify physical clearance and slot availability before purchase.\u003c\/p\u003e","brand":"Adaptec","offers":[{"title":"Default Title","offer_id":48266004332763,"sku":"B00XNSHRDY","price":85.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/11x4gcQcyuL._AC.jpg?v=1776384957","url":"https:\/\/gearmusthave.com\/products\/asr-5405-adaptec-pcie-x8-4-port-sas-raid-controller-256mb-cache","provider":"GearMustHave","version":"1.0","type":"link"}