{"id":451,"date":"2022-05-16T10:35:18","date_gmt":"2022-05-16T10:35:18","guid":{"rendered":"https:\/\/transcend.tempelgroup.com\/blog\/?p=451"},"modified":"2022-05-20T07:29:13","modified_gmt":"2022-05-20T07:29:13","slug":"power-shield-ps","status":"publish","type":"post","link":"https:\/\/transcend.tempelgroup.com\/blog\/power-shield-ps\/","title":{"rendered":"Power Shield (PS)"},"content":{"rendered":"<p>[et_pb_section fb_built=\u00bb1&#8243; fullwidth=\u00bbon\u00bb _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_fullwidth_header title=\u00bbPower Shield (PS)\u00bb button_one_url=\u00bbhttps:\/\/transcend.tempelgroup.com\/blog\/tecnologias\u00bb button_two_url=\u00bbhttps:\/\/transcend.tempelgroup.com\/blog\/estabilidad\u00bb _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb background_color=\u00bbrgba(0,0,0,0.3)\u00bb background_image=\u00bbhttps:\/\/transcend.tempelgroup.com\/blog\/wp-content\/uploads\/2022\/05\/HQ_PS_Banner_1.jpeg\u00bb background_blend=\u00bboverlay\u00bb hover_enabled=\u00bb0&#8243; global_colors_info=\u00bb{}\u00bb custom_button_one=\u00bbon\u00bb button_one_icon=\u00bb&#xf053;||fa||900&#8243; button_one_icon_placement=\u00bbleft\u00bb custom_button_two=\u00bbon\u00bb button_two_icon=\u00bb&#xf053;||fa||900&#8243; button_two_icon_placement=\u00bbleft\u00bb sticky_enabled=\u00bb0&#8243;][\/et_pb_fullwidth_header][\/et_pb_section][et_pb_section fb_built=\u00bb1&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_row _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb4_4&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<h2>How do Solid State Drives store data?<\/h2>\n<p>&nbsp;<\/p>\n<p>Data being written to SSDs is temporarily stored in DRAM cache memory before being transferred to NAND flash. This is done to take advantage of the quick response time of DRAM to boost the performance of the SSD. But as DRAM cache memory is volatile, an external power supply is required to hold and to flush data.<\/p>\n<p>During a proper power shutdown process, notice is given by the host to the SSD controller that power will be immediately cut. The controller sends an acknowledgement back to the host and then flushes all data in the DRAM cache to the NAND flash.<\/p>\n<p>[\/et_pb_text][et_pb_image src=\u00bbhttps:\/\/transcend.tempelgroup.com\/blog\/wp-content\/uploads\/2022\/05\/PS_EN_1.png\u00bb title_text=\u00bbPS_EN_1&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_image][et_pb_text _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<div class=\"row  page_article_sec\">\n<div class=\"col-xs-12\">\n<p>However, during an unexpected power loss, the in-transit data can neither be stored nor flushed to the flash. In this case, data stored on the SSD is not updated, which can lead to a problem with data incompatibility, data corruption, or even total device failure.<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<div class=\"row  page_article_sec\">\n<div class=\"col-xs-12\">\n<h2>Data at risk in a power failure<\/h2>\n<p>&nbsp;<\/p>\n<p>In the event of an unexpected power failure, data loss can take place in any of the following flows:<\/p>\n<\/div>\n<\/div>\n<p>[\/et_pb_text][et_pb_image src=\u00bbhttps:\/\/transcend.tempelgroup.com\/blog\/wp-content\/uploads\/2022\/05\/PS_EN_2.png\u00bb title_text=\u00bbPS_EN_2&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_image][et_pb_text _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<div class=\"row  page_article_sec\">\n<div class=\"col-xs-12\">\n<h2><\/h2>\n<h2><\/h2>\n<h2><\/h2>\n<h2><\/h2>\n<h2>What is Power Shield (PS)?<\/h2>\n<p>&nbsp;<\/p>\n<p>Power Shield (PS) is a basic technology supported by all Transcend&#8217;s embedded SSDs to prevent internal NAND flash data loss in the event of a sudden power outage. The internal voltage detection circuit (VDT) of the controller monitors the external power supply. When external voltage drops from 5V to 4V or from 3.3V to 2.7V, the VDT activates the PS. When a sudden power outage occurs, the internal power shield circuit triggers the PS function so the controller will stop accepting new write commands. Write operation is halted to ensure that the firmware and data in the NAND flash remain undamaged.<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<div class=\"row  page_article_sec\">\n<div class=\"col-xs-12\">\n<h2>Advantages of Transcend\u2019s IPS &amp; PS<\/h2>\n<p>&nbsp;<\/p>\n<p>Intelligent Power Shield (IPS) is another patented technology created by Transcend. For top performance, Transcend uses superior components, such as an advanced voltage detector, to trigger IPS. Additionally, Transcend utilizes polymer tantalum capacitors \u2013 heavy-duty, low-profile capacitors that operate stably in harsh environments. Though an entry-level feature that requires no added capacitors, PS similarly enables the SSD\u2019s internal power detecting mechanism to monitor power provided by the host. When the power fails, the voltage drops, and the voltage detector triggers the PS, which makes the SSD controller stop writing data to the NAND flash. This ensures that the data stored on the NAND is intact. However, unlike IPS, PS doesn\u2019t create extra buffer time for the NAND flash to complete the write process.<\/p>\n<\/div>\n<\/div>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=\u00bb1&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb custom_padding=\u00bb0px|0px|0px|0px|true|true\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_row column_structure=\u00bb1_3,1_3,1_3&#8243; use_custom_gutter=\u00bbon\u00bb gutter_width=\u00bb1&#8243; make_equal=\u00bbon\u00bb _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb custom_padding=\u00bb0px|0px|0px|0px|true|true\u00bb custom_css_main_element=\u00bbdisplay: flex;||flex-wrap: nowrap;\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb1_3&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#FFFFFF\u00bb background_color=\u00bb#999999&#8243; width=\u00bb100%\u00bb max_width=\u00bb100%\u00bb height=\u00bb100%\u00bb custom_padding=\u00bb10px|10px|10px|10px|true|true\u00bb custom_css_main_element=\u00bbflex-grow: 1;||flex-shrink: 0;||display: flex;||justify-content: center;||align-items:center;\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_text][\/et_pb_column][et_pb_column type=\u00bb1_3&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#FFFFFF\u00bb background_color=\u00bb#999999&#8243; width=\u00bb100%\u00bb max_width=\u00bb100%\u00bb height=\u00bb100%\u00bb custom_padding=\u00bb10px|10px|10px|10px|true|true\u00bb custom_css_main_element=\u00bbflex-grow: 1;||flex-shrink: 0;||display: flex;||justify-content: center;||align-items:center;\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<p style=\"text-align: center;\">IPS<\/p>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=\u00bb1_3&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#FFFFFF\u00bb background_color=\u00bb#999999&#8243; width=\u00bb100%\u00bb max_width=\u00bb100%\u00bb height=\u00bb100%\u00bb custom_padding=\u00bb10px|10px|10px|10px|true|true\u00bb custom_css_main_element=\u00bbflex-grow: 1;||flex-shrink: 0;||display: flex;||justify-content: center;||align-items:center;\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<p style=\"text-align: center;\"><span>96 Capas<\/span><br \/><span>3D TLC<\/span><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=\u00bb1_3,1_3,1_3&#8243; use_custom_gutter=\u00bbon\u00bb gutter_width=\u00bb1&#8243; make_equal=\u00bbon\u00bb _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb custom_padding=\u00bb0px|0px|0px|0px|true|true\u00bb custom_css_main_element=\u00bbdisplay: flex;||flex-wrap: nowrap;\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb1_3&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#000000&#8243; background_color=\u00bb#eaeaea\u00bb width=\u00bb100%\u00bb max_width=\u00bb100%\u00bb height=\u00bb100%\u00bb custom_padding=\u00bb10px|20px|10px|20px|true|true\u00bb custom_css_main_element=\u00bbflex-grow: 1;||flex-shrink: 0;||display: flex;||align-items:center;\u00bb border_width_bottom=\u00bb1px\u00bb border_color_bottom=\u00bbrgba(0,0,0,0.3)\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<p style=\"text-align: left;\">Hardware<\/p>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=\u00bb1_3&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb text_font=\u00bb||||||||\u00bb text_text_color=\u00bb#000000&#8243; background_color=\u00bb#FFFFFF\u00bb width=\u00bb100%\u00bb max_width=\u00bb100%\u00bb height=\u00bb100%\u00bb custom_padding=\u00bb10px|20px|10px|20px|true|true\u00bb custom_css_main_element=\u00bbflex-grow: 1;||flex-shrink: 0;||display: flex;||justify-content: center;||align-items:center;\u00bb border_width_bottom=\u00bb1px\u00bb border_color_bottom=\u00bbrgba(0,0,0,0.3)\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<p style=\"text-align: center;\"><span>With a built-in voltage detector (VDT) and inclusion of polymer tantalum capacitors (PTCs), IPS creates more time for data to be written from DRAM to NAND flash memory when voltage drops to between 4V and 2.3V.<\/span><\/p>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=\u00bb1_3&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb text_font=\u00bb||||||||\u00bb text_text_color=\u00bb#000000&#8243; background_color=\u00bb#FFFFFF\u00bb width=\u00bb100%\u00bb max_width=\u00bb100%\u00bb height=\u00bb100%\u00bb custom_padding=\u00bb10px|20px|10px|20px|true|true\u00bb custom_css_main_element=\u00bbflex-grow: 1;||flex-shrink: 0;||display: flex;||justify-content: center;||align-items:center;\u00bb border_width_bottom=\u00bb1px\u00bb border_color_bottom=\u00bbrgba(0,0,0,0.3)\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<p style=\"text-align: center;\"><span>When the external voltage drops to a certain level, the controller\u2019s internal VDT activates the PS mechanism. The SSD controller then stops sending new write commands to the flash memory.<\/span><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=\u00bb1_3,1_3,1_3&#8243; use_custom_gutter=\u00bbon\u00bb gutter_width=\u00bb1&#8243; make_equal=\u00bbon\u00bb _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb custom_padding=\u00bb0px|0px|0px|0px|true|true\u00bb custom_css_main_element=\u00bbdisplay: flex;||flex-wrap: nowrap;\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb1_3&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb text_text_color=\u00bb#000000&#8243; background_color=\u00bb#eaeaea\u00bb width=\u00bb100%\u00bb max_width=\u00bb100%\u00bb height=\u00bb100%\u00bb custom_padding=\u00bb10px|20px|10px|20px|true|true\u00bb custom_css_main_element=\u00bbflex-grow: 1;||flex-shrink: 0;||display: flex;||align-items:center;\u00bb border_width_bottom=\u00bb1px\u00bb border_color_bottom=\u00bbrgba(0,0,0,0.3)\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<p style=\"text-align: left;\">Firmware<\/p>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=\u00bb1_3&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb text_font=\u00bb||||||||\u00bb text_text_color=\u00bb#000000&#8243; background_color=\u00bb#FFFFFF\u00bb width=\u00bb100%\u00bb max_width=\u00bb100%\u00bb height=\u00bb100%\u00bb custom_padding=\u00bb10px|20px|10px|20px|true|true\u00bb custom_css_main_element=\u00bbflex-grow: 1;||flex-shrink: 0;||display: flex;||justify-content: center;||align-items:center;\u00bb border_width_bottom=\u00bb1px\u00bb border_color_bottom=\u00bbrgba(0,0,0,0.3)\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<p style=\"text-align: center;\">Once IPS is triggered, the firmware automatically flushes data from the DRAM cache to NAND flash memory.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=\u00bb1_3&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb text_font=\u00bb||||||||\u00bb text_text_color=\u00bb#000000&#8243; background_color=\u00bb#FFFFFF\u00bb width=\u00bb100%\u00bb max_width=\u00bb100%\u00bb height=\u00bb100%\u00bb custom_padding=\u00bb10px|20px|10px|20px|true|true\u00bb custom_css_main_element=\u00bbflex-grow: 1;||flex-shrink: 0;||display: flex;||justify-content: center;||align-items:center;\u00bb border_width_bottom=\u00bb1px\u00bb border_color_bottom=\u00bbrgba(0,0,0,0.3)\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<p style=\"text-align: center;\">The SSD controller stops accepting new write commands from the host, ensuring the integrity of existing data on the NAND flash.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb4_4&#8243; _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text _builder_version=\u00bb4.17.3&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<div class=\"row  page_article_sec\">\n<div class=\"col-xs-12\">\n<h2><\/h2>\n<h2><\/h2>\n<h2><\/h2>\n<h2><\/h2>\n<h2><\/h2>\n<h2>Summary<\/h2>\n<p>&nbsp;<\/p>\n<p>PS ensures data transfer integrity and minimizes the possibility of device failure during unexpected power outages on Transcend\u2019s SSD products. To learn more about Intelligent Power Shield (IPS), please click<span>\u00a0<\/span><a href=\"https:\/\/es.transcend-info.com\/Embedded\/Essay-49\">here<\/a>.<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<div class=\"row  page_article_sec\">\n<div class=\"col-xs-12\">\n<h2><\/h2>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<div class=\"row page_success_story\"><\/div>\n<div class=\"row page_article_share\">\n<div class=\"col-md-4 col-md-offset-4\">\n<div class=\"row\"><\/div>\n<\/div>\n<\/div>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p><a class=\"more-link\" href=\"https:\/\/transcend.tempelgroup.com\/content\/28-power-shield-ps\" target=\"_parent\" rel=\"noopener\">Leer m\u00e1s<\/a><\/p>\n","protected":false},"author":1,"featured_media":228,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"2880","footnotes":""},"categories":[8,4],"tags":[],"class_list":["post-451","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-estabilidad","category-tecnologias"],"_links":{"self":[{"href":"https:\/\/transcend.tempelgroup.com\/blog\/wp-json\/wp\/v2\/posts\/451","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/transcend.tempelgroup.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/transcend.tempelgroup.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/transcend.tempelgroup.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/transcend.tempelgroup.com\/blog\/wp-json\/wp\/v2\/comments?post=451"}],"version-history":[{"count":10,"href":"https:\/\/transcend.tempelgroup.com\/blog\/wp-json\/wp\/v2\/posts\/451\/revisions"}],"predecessor-version":[{"id":724,"href":"https:\/\/transcend.tempelgroup.com\/blog\/wp-json\/wp\/v2\/posts\/451\/revisions\/724"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/transcend.tempelgroup.com\/blog\/wp-json\/wp\/v2\/media\/228"}],"wp:attachment":[{"href":"https:\/\/transcend.tempelgroup.com\/blog\/wp-json\/wp\/v2\/media?parent=451"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/transcend.tempelgroup.com\/blog\/wp-json\/wp\/v2\/categories?post=451"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/transcend.tempelgroup.com\/blog\/wp-json\/wp\/v2\/tags?post=451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}