{"id":90637,"date":"2024-03-12T12:47:32","date_gmt":"2024-03-12T17:47:32","guid":{"rendered":"https:\/\/eshop.macsales.com\/blog\/?p=90637"},"modified":"2024-08-19T17:26:36","modified_gmt":"2024-08-19T22:26:36","slug":"how-flash-memory-really-works-and-why-its-important-to-sanitize-your-memory-cards","status":"publish","type":"post","link":"https:\/\/eshop.macsales.com\/blog\/90637-how-flash-memory-really-works-and-why-its-important-to-sanitize-your-memory-cards\/","title":{"rendered":"How Flash Memory Really Works and Why It&#8217;s Important to Sanitize Your Memory Cards"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero.png\" alt=\"\" class=\"wp-image-90643\" srcset=\"https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero.png 1920w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero-213x120.png 213w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero-284x160.png 284w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero-190x107.png 190w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero-1536x864.png 1536w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero-1400x787.png 1400w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero-750x421.png 750w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero-548x308.png 548w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero-364x204.png 364w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero-230x129.png 230w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero-100x56.png 100w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero-213x120@2x.png 426w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero-284x160@2x.png 568w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/sanitize-memory-cards-hero-190x107@2x.png 380w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<p><a href=\"https:\/\/eshop.macsales.com\/shop\/memory-cards\/atlas\" target=\"_blank\" rel=\"noreferrer noopener\">Flash memory has revolutionized our world<\/a> by replacing film and tapes in our cameras while enabling new products and applications such as the cellphone. Today, it&#8217;s hard to imagine living in a world without this revolutionary storage medium. Flash memory is the cheapest medium with the highest capacity among all the other none volatile memory alternatives while being much faster than traditional hard disk drives that are being replaced with Solid State Drives (SSD).&nbsp;&nbsp;<\/p>\n\n\n\n<p>An average user of <a href=\"https:\/\/eshop.macsales.com\/shop\/memory-cards\/atlas\" target=\"_blank\" rel=\"noreferrer noopener\">SD or CFexpress memory cards<\/a> may not be aware of the complexities and challenges in the design of such products and how flash memory is enabled within them. And while flash memory while has all the above advantages, the technology also has some shortcomings and limitations in terms of how data is written to and read from it while making sure every bit of memory is worn evenly. That&#8217;s because every bit in flash memory has a limited life cycle.&nbsp;&nbsp;<\/p>\n\n\n\n<p>All of these complexities are managed by a flash memory controller that resides between the host interface and the flash memory. For that reason, not all controllers leveraged in a memory card or SSD are built equal. But one thing that is common between all the controllers is that they all have to do what we call Garbage Collection (GC) in the flash.&nbsp;&nbsp;<\/p>\n\n\n\n<p>So, what is GC, why do you need to worry about it, and what is its impact on your memory card and your experience using that card in your camera? That&#8217;s what we&#8217;ll address in this article.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-a-metaphor-for-understanding-flash-memory-structure\">A metaphor for understanding flash memory structure<\/h2>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignleft size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"284\" height=\"165\" src=\"https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.48.22\u202fPM-284x165.png\" alt=\"\" class=\"wp-image-90638\" srcset=\"https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.48.22\u202fPM-284x165.png 284w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.48.22\u202fPM-207x120.png 207w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.48.22\u202fPM-190x110.png 190w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.48.22\u202fPM.png 658w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.48.22\u202fPM-284x165@2x.png 568w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.48.22\u202fPM-207x120@2x.png 414w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.48.22\u202fPM-190x110@2x.png 380w\" sizes=\"auto, (max-width: 284px) 100vw, 284px\" \/><\/figure><\/div>\n\n\n\n<p>Imagine a state in the U.S. Each state has many counties within it, and each county contains multiple towns. Inside each of these towns are many blocks and many homes inside each block. A flash memory package, as you can see in Fig. 1 on the right, is also structured the same way. <\/p>\n\n\n\n<p>A single flash memory package (the State) has many flash memory dies (Counties) stacked on top of one another. Each die has multiple Planes (Towns), many Blocks (Blocks) in each die, and many Pages (Homes) inside each block. <\/p>\n\n\n\n<p>When you buy a new memory card and you start taking pictures or recording videos, the flash controller puts that newly created data into each one of the available &#8220;homes&#8221; on the memory that are empty at this point. When you completely fill up your memory card, it is similar to all the homes in that state being filled up with data. <\/p>\n\n\n\n<p>When you quick format your memory card or delete pictures or videos manually, your camera thinks that you have emptied all the homes and allows you to start filling up the card again. However, due to the way flash memory works, those files are actually still there. (For that reason, data recovery software solutions can get your data back after accidental deletion or quick format.)<\/p>\n\n\n\n<p>This is a condition that we refer to as flash memory being &#8220;dirty.&#8221;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-dirty-memory-slows-you-down\">Dirty memory slows you down<\/h2>\n\n\n\n<p>So, what happens in the next round of recording when your flash card is dirty? As you start recording video or taking photos, because the flash is dirty, the flash controller has to do some Garbage Collection in order to clean the homes and make room for new data. This is where the shortcoming of flash memory architecture comes into play. <\/p>\n\n\n\n<p>Flash memory allows for homes to be filled individually. However, when it comes to creating space or Garbage Collection, it has to move all the good data from all the individual homes inside an existing block, over to a new block, or completely erase all the dirty homes in the block so that new data can be recorded. Flash controller has to do all of this Garbage Collection on other blocks while it is putting new data in previously cleaned blocks. Flash controller does this Garbage Collection extremely fast (fractions of a second), but since it has to do two things at the same time, it causes the moving of data to slow down for a split second when new data is being moved into clean homes.&nbsp;&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"834\" height=\"498\" src=\"https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.49.32\u202fPM.png\" alt=\"\" class=\"wp-image-90639\" srcset=\"https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.49.32\u202fPM.png 834w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.49.32\u202fPM-201x120.png 201w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.49.32\u202fPM-284x170.png 284w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.49.32\u202fPM-190x113.png 190w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.49.32\u202fPM-201x120@2x.png 402w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.49.32\u202fPM-284x170@2x.png 568w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/Screenshot-2024-03-12-at-12.49.32\u202fPM-190x113@2x.png 380w\" sizes=\"auto, (max-width: 834px) 100vw, 834px\" \/><\/figure>\n\n\n\n<p>Fig. 2 above shows the performance of a card when the card is in factory condition\u2014fully sanitized with all &#8220;homes&#8221; clean and empty.&nbsp;<\/p>\n\n\n\n<p>Fig. 3 shows the card in dirty condition. The controller is forced to do Garbage Collection while data is being recorded. That is shown by performance drops in Fig. 3 for a split second.&nbsp;<\/p>\n\n\n\n<p>Based on the above illustration, if you are recording at a high bit-rate on a high-end camera that requires 800MB\/s sustained write, you will not have any issues when the card is sanitized and clean. However, use that card on the same camera and you will likely drop frames when the card is very dirty at the same bit-rate requirements. Alternatively, if you are recording in a setting that requires 200MB\/s sustained write, you will still be okay with the dirty condition of the above card because even during the Garbage Collection where performance drops, it never drops below the required speed for that setting so the recording will continue uninterrupted.&nbsp;&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-avoid-a-dirty-memory-card\">How to avoid a dirty memory card<\/h2>\n\n\n\n<p>Here at OWC, we believe in fully integrated solutions. We build <a href=\"https:\/\/eshop.macsales.com\/blog\/90151-owc-atlas-usb4-cfexpress-card-reader\/\" data-type=\"post\" data-id=\"90151\">memory card readers<\/a> that work perfectly with our <a rel=\"noreferrer noopener\" href=\"https:\/\/eshop.macsales.com\/shop\/memory-cards\/atlas\" target=\"_blank\">high-speed memory cards<\/a> and are designed to ensure that you don\u2019t drop frames during capture and that post capture your data transfers as quickly as possible from your cards to your computer&#8217;s internal drive or to one of our blazing fast <a href=\"https:\/\/eshop.macsales.com\/blog\/89210-owc-thunderblade-x8-review-performance-figures\/\" data-type=\"post\" data-id=\"89210\">Thunderbolt<\/a> or <a href=\"https:\/\/eshop.macsales.com\/blog\/87810-owc-unveils-its-fastest-drive-yet-the-express-1m2-with-usb4\/\" data-type=\"post\" data-id=\"87810\">USB4 drives<\/a>.<\/p>\n\n\n\n<p>We created <a rel=\"noreferrer noopener\" href=\"https:\/\/eshop.macsales.com\/shop\/innergize\" target=\"_blank\">Innergize<\/a> as another crucial piece of this Atlas ecosystem that guarantees your card will always perform at its peak performance, ensuring that you will never miss a moment due to a dropped frame. <a rel=\"noreferrer noopener\" href=\"https:\/\/eshop.macsales.com\/shop\/innergize\" target=\"_blank\">Innergize<\/a> allows you to manage and monitor the health and performance of your memory cards. It also allows you to &#8220;sanitize&#8221; your cards.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1500\" height=\"955\" src=\"https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/owc-innergize-screen-main.png\" alt=\"\" class=\"wp-image-90642\" srcset=\"https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/owc-innergize-screen-main.png 1500w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/owc-innergize-screen-main-188x120.png 188w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/owc-innergize-screen-main-284x181.png 284w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/owc-innergize-screen-main-190x121.png 190w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/owc-innergize-screen-main-188x120@2x.png 376w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/owc-innergize-screen-main-284x181@2x.png 568w, https:\/\/eshop.macsales.com\/blog\/wp-content\/uploads\/2024\/03\/owc-innergize-screen-main-190x121@2x.png 380w\" sizes=\"auto, (max-width: 1500px) 100vw, 1500px\" \/><figcaption>Innergize allows you to sanitize SD and CFexpress memory cards, keeping them in like-new condition and ensuring peak performance.<\/figcaption><\/figure>\n\n\n\n<p>Unlike a quick format or manually removing photos and videos from your memory card, &#8220;sanitizing&#8221; brings your memory card back to pristine factory condition. After sanitizing your card, the flash controller doesn&#8217;t have to perform Garbage Collection while new data is being recorded. This keeps your memory card working at its highest possible sustained speed. <\/p>\n\n\n\n<p>Why take a chance on that important project when it literally takes just a few seconds to sanitize your cards within Innergize? In addition, <a href=\"https:\/\/eshop.macsales.com\/shop\/innergize\" target=\"_blank\" rel=\"noreferrer noopener\">Innergize<\/a> software enables you to check the health of your card and informs you if there is a firmware upgrade available for your memory card.<\/p>\n\n\n\n<p>The best part is that Innergize is completely free. Because we care about fully optimizing our cards, <a href=\"https:\/\/eshop.macsales.com\/shop\/innergize\" target=\"_blank\" rel=\"noreferrer noopener\">OWC Innergize is a free app<\/a>. All you need is a compatible OWC card reader.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-cameras-are-embracing-the-sanitize-feature-as-well-almost\">Cameras are embracing the sanitize feature as well&#8230;almost<\/h2>\n\n\n\n<p>As the resolution, color depth and frame rates increase in high-end cameras, some camera manufacturers have started implementing the sanitize (or Low-Level-Format) capability as the default formatting option in their cameras&#8217; options menus to prevent the card from triggering Garbage Collection in the middle of recording. <\/p>\n\n\n\n<p>These cameras include, but are not limited to RED and Blackmagic Cinema 6K. Other cameras offer both quick format and low-level format\/sanitize options, including the Nikon Z9\/Z8, Canon 1DX MIII, and the Panasonic GH6.<\/p>\n\n\n\n<p>Please keep in mind these cameras offer such capability only when their camera supports CFexpress as media through NVMe standard commands. No such capability exists for SD cards as there is no standard SD command to sanitize a SD card. <\/p>\n\n\n\n<p>However, OWC has implemented custom capabilities in their cards firmware so that Sanitize functionality <em>can<\/em> be run on its SD cards in addition to CFexpress cards and even some of its SSDs such as the Envoy Pro Elektron.&nbsp;&nbsp;<\/p>\n\n\n\n<p>Never take a chance with a dirty card. <a href=\"https:\/\/eshop.macsales.com\/shop\/innergize\" target=\"_blank\" rel=\"noreferrer noopener\">Innergize and Sanitize your cards<\/a> before any important shoot to reduce your anxiety and eliminate the chance of dropped frames.&nbsp;&nbsp;&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Don&#8217;t forfeit your memory card&#8217;s performance with quick formatting. Sanitizing your cards ensures peak performance. Here&#8217;s why.<\/p>\n","protected":false},"author":308,"featured_media":90643,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"spay_email":"","footnotes":""},"categories":[3765,4],"class_list":["post-90637","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-owc-news","category-tech-tips"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.2 (Yoast SEO v20.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How Flash Memory Really Works and Why It&#039;s Important to Sanitize Your Memory Cards<\/title>\n<meta name=\"description\" content=\"Don&#039;t forfeit your memory card&#039;s performance with quick formatting. Sanitizing your cards ensures peak performance. 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