{"id":39702,"date":"2026-09-08T05:14:37","date_gmt":"2026-09-08T05:14:37","guid":{"rendered":"https:\/\/geektechsol.com\/index.php\/product\/405148-b21-hp-512mb-battery-backed-write-cache-upgrade\/"},"modified":"2026-09-08T05:14:41","modified_gmt":"2026-09-08T05:14:41","slug":"405148-b21-hp-512mb-battery-backed-write-cache-upgrade","status":"publish","type":"product","link":"http:\/\/geektechsol.com\/index.php\/product\/405148-b21-hp-512mb-battery-backed-write-cache-upgrade\/","title":{"rendered":"405148-B21 HP 512MB Battery Backed Write Cache Upgrade"},"content":{"rendered":"<p>405148-B21 Technical Specifications<\/p>\n<p>HP 512MB Battery Backed Write Cache Upgrade<\/p>\n<p>Manufacturer: HP<\/p>\n<p>Part Number or SKU# 405148-B21<\/p>\n<p>Type: Controller<\/p>\n<p>Sub -Type: Accessories<\/p>\n<p>Technical Information<\/p>\n<p>Device Type: Battery Back Write Cache Enabler<\/p>\n<p>Cache: 512 MB<\/p>\n<p>Battery Cable Assembly: 28AWG, 16-Pin \u2013 29.2cm (11.5in) Long<\/p>\n<p>Battery Details: Ni-MH, 4.8V, 5000mAh<\/p>\n<p>Upgrade Type: System specific<\/p>\n<p>Memory Type: DRAM<\/p>\n<p>Expansion \/ Connectivity<\/p>\n<p>Compatible Slots: 1 x memory<\/p>\n","protected":false},"excerpt":{"rendered":"<p>405148-B21 Overview<\/p>\n<p>The HP 512MB Battery Backed Write Cache Upgrade is an add-on for the HP Smart Array P400 storage controller. This upgrade improves the performance and reliability of the storage system by providing battery-backed write caching. The write cache is a type of memory that temporarily stores data before it is written to the disk. The battery backup ensures that the data in the write cache is not lost in case of a power failure or system crash.<\/p>\n","protected":false},"featured_media":39703,"comment_status":"closed","ping_status":"open","template":"","meta":{"_acf_changed":false},"product_brand":[504],"product_cat":[680,5445],"product_tag":[682,356],"class_list":["post-39702","product","type-product","status-publish","has-post-thumbnail","product_brand-hp","product_cat-controllers","product_cat-hpe-controllers","product_tag-controller-card","product_tag-pci-express","first","instock","shipping-taxable","purchasable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>405148-B21 HP 512MB Battery Backed Write Cache Upgrade - Geek Tech Sol<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/geektechsol.com\/index.php\/product\/405148-b21-hp-512mb-battery-backed-write-cache-upgrade\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"405148-B21 HP 512MB Battery Backed Write Cache Upgrade - Geek Tech Sol\" \/>\n<meta property=\"og:description\" content=\"405148-B21 Overview The HP 512MB Battery Backed Write Cache Upgrade is an add-on for the HP Smart Array P400 storage controller. 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