{"product_id":"seagate-ironwolf-pro-20tb-nas-hard-drive-st20000nt001","title":"Seagate IronWolf Pro 20TB SATA 6Gb\/s 7200RPM 256MB Cache (512e) NAS 3.5-inch Internal Hard Drive - ST20000NT001","description":"\u003cp\u003eThe Seagate IronWolf Pro ST20000NT001 is a 20TB NAS hard drive for storage that never sleeps. It spins at 7200 RPM, has a 256MB cache, and uses CMR recording. A helium-sealed case helps hold power draw down.\u003c\/p\u003e\n\u003cp\u003eSeagate rates it for 550TB of workload a year, with a 2.5 million hour MTBF. Rotational vibration sensors help it hold speed when many drives share one enclosure. Peak sustained speed is 285 MB\/s.\u003c\/p\u003e\n\u003ch2\u003eWhat the IronWolf Pro 20TB handles\u003c\/h2\u003e\n\u003cp\u003eThink RAID 5, RAID 6, and RAID 10 volumes in a multi-bay NAS. Plex and Jellyfin libraries, camera archives, and small-office file servers fit well too. The 512e format works with current NAS software. IronWolf Health Management can warn you about trouble early, on NAS systems that support it.\u003c\/p\u003e\n\u003ch2\u003eWhy CMR matters in a RAID array\u003c\/h2\u003e\n\u003cp\u003eCMR writes tracks side by side. SMR overlaps them like roof shingles. Overlap slows rewrites, which hurts during a RAID rebuild. Four 20TB drives give about 60TB usable in RAID 5, or 40TB in RAID 6.\u003c\/p\u003e\n\u003ch2\u003eST20000NT001 specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSeagate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eIronWolf Pro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eModel number\u003c\/th\u003e\n\u003ctd\u003eST20000NT001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e20TB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInterface\u003c\/th\u003e\n\u003ctd\u003eSATA 6Gb\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSpindle speed\u003c\/th\u003e\n\u003ctd\u003e7200 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCache\u003c\/th\u003e\n\u003ctd\u003e256MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSector format\u003c\/th\u003e\n\u003ctd\u003e512e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRecording\u003c\/th\u003e\n\u003ctd\u003eCMR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDesign\u003c\/th\u003e\n\u003ctd\u003eHelium-sealed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSustained transfer\u003c\/th\u003e\n\u003ctd\u003eUp to 285 MB\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWorkload rating\u003c\/th\u003e\n\u003ctd\u003eUp to 550TB per year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMTBF\u003c\/th\u003e\n\u003ctd\u003e2.5 million hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eForm factor\u003c\/th\u003e\n\u003ctd\u003e3.5-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eQuestions about the ST20000NT001\u003c\/h2\u003e\n\u003ch3\u003eST20000NT001 or ST20000NE000?\u003c\/h3\u003e\n\u003cp\u003eBoth are 20TB, 7200 RPM, 256MB CMR drives with 285 MB\/s speeds. The NT001 raises the workload rating to 550TB a year. The NE000 is rated for 300TB.\u003c\/p\u003e\n\u003ch3\u003eIs it good for a home NAS?\u003c\/h3\u003e\n\u003cp\u003eYes. It's built for 24\/7 use in multi-bay NAS boxes. Expect more noise than a 5400 RPM drive, so give the NAS a spot away from your desk.\u003c\/p\u003e\n\u003ch3\u003eIs it 512e or 4Kn?\u003c\/h3\u003e\n\u003cp\u003e512e. The drive reports 512-byte sectors and uses 4K sectors inside, which NAS software handles well.\u003c\/p\u003e\n\u003ch3\u003eHow long does a RAID rebuild take?\u003c\/h3\u003e\n\u003cp\u003eAt 285 MB\/s, one full pass over 20TB takes about 19.5 hours at best. Plan for more, since speed falls toward the inner tracks.\u003c\/p\u003e\n\u003ch3\u003eDoes it need a special NAS?\u003c\/h3\u003e\n\u003cp\u003eNo. It fits any 3.5-inch SATA bay. IronWolf Health Management needs a supported NAS system.\u003c\/p\u003e","brand":"Seagate","offers":[{"title":"Default Title","offer_id":62810445513075,"sku":"ST20000NT001","price":1087.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0992\/9546\/1747\/files\/Seagate_IronWolf_Pro_35_8146e71b-0f52-423e-b290-3dabdebd0619.jpg?v=1778007852","url":"https:\/\/cpurepublic.com\/products\/seagate-ironwolf-pro-20tb-nas-hard-drive-st20000nt001","provider":"CPU Republic LLC","version":"1.0","type":"link"}