{"id":4719,"date":"2026-02-21T21:05:19","date_gmt":"2026-02-21T15:35:19","guid":{"rendered":"https:\/\/itsupportwale.com\/blog\/10-essential-cybersecurity-tips-to-protect-your-data-2\/"},"modified":"2026-02-21T21:05:19","modified_gmt":"2026-02-21T15:35:19","slug":"10-essential-cybersecurity-tips-to-protect-your-data-2","status":"publish","type":"post","link":"https:\/\/itsupportwale.com\/blog\/10-essential-cybersecurity-tips-to-protect-your-data-2\/","title":{"rendered":"10 Essential Cybersecurity Tips to Protect Your Data"},"content":{"rendered":"<p>03:14 AM &#8211; The silence was the first sign. <\/p>\n<p>The Zabbix alerts didn&#8217;t trigger because the monitoring VM was the first to have its vmdk headers shredded. I only noticed because the hum of the drive arrays in Rack 4 changed pitch\u2014a frantic, high-frequency seeking sound that tells you the heads are working overtime to destroy your career. By the time I pulled up a console, the Debian 11 Bullseye splash screen was gone, replaced by a grub rescue prompt that couldn&#8217;t find the filesystem. <\/p>\n<p>If you\u2019re reading this, kid, it means I finally walked out, or the caffeine finally stopped my heart. You\u2019re sitting in my chair now. Don&#8217;t touch the keyboard until you\u2019ve read this log. The &#8220;best practices&#8221; they taught you in your $5,000 boot camp are useless here. This wasn&#8217;t a script kiddie with a Kali ISO; this was a surgical strike on our infrastructure that exploited every single &#8220;we&#8217;ll fix that later&#8221; note I ever wrote.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69d825d736d52\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69d825d736d52\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/itsupportwale.com\/blog\/10-essential-cybersecurity-tips-to-protect-your-data-2\/#The_Initial_Triage_Why_the_Backups_Failed\" >The Initial Triage: Why the Backups Failed<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/itsupportwale.com\/blog\/10-essential-cybersecurity-tips-to-protect-your-data-2\/#Tracing_the_Lateral_Movement_The_RDP_and_SSH_Pivot\" >Tracing the Lateral Movement: The RDP and SSH Pivot<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/itsupportwale.com\/blog\/10-essential-cybersecurity-tips-to-protect-your-data-2\/#Auditing_the_Kernel_and_the_Shell_Forensic_Scavenging\" >Auditing the Kernel and the Shell: Forensic Scavenging<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/itsupportwale.com\/blog\/10-essential-cybersecurity-tips-to-protect-your-data-2\/#Hardening_the_Kernel_sysctl_and_the_Illusion_of_Safety\" >Hardening the Kernel: sysctl and the Illusion of Safety<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/itsupportwale.com\/blog\/10-essential-cybersecurity-tips-to-protect-your-data-2\/#Rebuilding_the_Perimeter_iptables_and_SSH_Hardening\" >Rebuilding the Perimeter: iptables and SSH Hardening<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/itsupportwale.com\/blog\/10-essential-cybersecurity-tips-to-protect-your-data-2\/#The_Human_Element_Why_Users_are_the_Ultimate_Zero-Day\" >The Human Element: Why Users are the Ultimate Zero-Day<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/itsupportwale.com\/blog\/10-essential-cybersecurity-tips-to-protect-your-data-2\/#Related_Articles\" >Related Articles<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"The_Initial_Triage_Why_the_Backups_Failed\"><\/span>The Initial Triage: Why the Backups Failed<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The first thing you\u2019ll want to do in a crisis is reach for the backups. Don\u2019t bother. They knew our retention policy better than the CFO does. They didn&#8217;t just encrypt the production data; they sat on the network for three weeks, mapping the Veeam service accounts and the secondary storage nodes. <\/p>\n<p>I found the entry point on a legacy Nginx 1.18.0 instance running on an unpatched Ubuntu 18.04 box that some &#8220;innovative&#8221; dev team stood up for a &#8220;three-day pilot&#8221; in 2019. It was still there, forgotten, facing the public internet. They used a known exploit to get a shell, then pivoted.<\/p>\n<p>When I checked the backup logs, the corruption was systematic. They didn&#8217;t delete the backups\u2014that would have triggered an alert. They modified the backup scripts to pipe <code>\/dev\/zero<\/code> into the archive stream after the first 10MB. To the monitoring software, the jobs &#8220;completed successfully.&#8221; The file sizes looked right. But the data was a void.<\/p>\n<p><strong>Hard-won lesson:<\/strong> If your backups are reachable via the same network they are protecting, they aren&#8217;t backups; they\u2019re just extra targets. One of the most vital <strong>cybersecurity tips<\/strong> I can give you is this: air-gap your secondary storage. If there isn&#8217;t a physical break or a strictly enforced one-way immutable policy (like S3 Object Lock with a compliance timer), you are betting your life on the mercy of a thief.<\/p>\n<p>I tried to run a simple check on the remaining nodes:<\/p>\n<pre class=\"codehilite\"><code class=\"language-bash\"># Check for modified binaries in \/bin and \/usr\/bin\nfind \/bin \/usr\/bin -mtime -3 -ls\n# Look for the ransom note across the remaining mounts\ngrep -r &quot;RESTORE_FILES.txt&quot; \/mnt\/storage\/\n<\/code><\/pre>\n<p>The results were a graveyard. Every critical database on the Linux Kernel 5.10.0-23-amd64 clusters was gone. The XFS metadata was scrambled beyond repair.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tracing_the_Lateral_Movement_The_RDP_and_SSH_Pivot\"><\/span>Tracing the Lateral Movement: The RDP and SSH Pivot<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Once they had the Nginx box, they didn&#8217;t go for the crown jewels immediately. They were quiet. They used <code>netstat -tulpn<\/code> to map our internal topology. They saw the management VLAN. They saw that I, in my infinite exhaustion three months ago, had left a password-based SSH login active on a jump box because my YubiKey was acting up.<\/p>\n<p>I found the trace in <code>\/var\/log\/auth.log<\/code> before the logrotate daemon was killed. <\/p>\n<pre class=\"codehilite\"><code class=\"language-text\">May 14 01:12:34 jump-box-01 sshd[12445]: Accepted password for root from 10.0.4.15 port 44322 ssh2\nMay 14 01:12:35 jump-box-01 sshd[12445]: pam_unix(sshd:session): session opened for user root by (uid=0)\n<\/code><\/pre>\n<p>They didn&#8217;t even need an exploit. They just guessed a password that was probably in a wordlist from a 2016 LinkedIn leak. From there, they used the jump box to scan the rest of the subnet. <\/p>\n<p>I ran this to see who else was currently &#8220;visiting&#8221; our dying kingdom:<\/p>\n<pre class=\"codehilite\"><code class=\"language-bash\"># Check active connections and the PIDs associated with them\nnetstat -atp | grep ESTABLISHED\n# Look for suspicious processes running out of \/tmp or \/dev\/shm\nps aux | grep -E 'tmp|shm'\n<\/code><\/pre>\n<p>I found a process masquerading as <code>kworker<\/code>, but it was running out of <code>\/dev\/shm<\/code>. It was a reverse shell calling back to an IP in a jurisdiction that doesn&#8217;t answer subpoenas. <\/p>\n<p>The attacker had upgraded the OpenSSH 8.4p1 daemon on the jump box to a patched version that logged every keystroke of every admin who logged in after them. They had my credentials. They had the keys to the kingdom because I was too tired to follow my own rules.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Auditing_the_Kernel_and_the_Shell_Forensic_Scavenging\"><\/span>Auditing the Kernel and the Shell: Forensic Scavenging<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>By hour 24, I was vibrating from the sheer volume of espresso and rage. I had to determine if the kernel itself was compromised. On Debian 11, you expect a certain level of integrity, but if they have root, they own the ring 0 space.<\/p>\n<p>I started digging into <code>journalctl<\/code> to see when the modules were loaded.<\/p>\n<pre class=\"codehilite\"><code class=\"language-bash\"># Check for kernel taints and suspicious module loads\njournalctl -k | grep -i &quot;taint&quot;\nlsmod | cut -d' ' -f1 | xargs modinfo | grep -E &quot;filename|vermagic&quot;\n<\/code><\/pre>\n<p>The attackers had loaded a rootkit that hooked the <code>getdents64<\/code> system call. This is why <code>ls<\/code> and <code>find<\/code> weren&#8217;t showing the encryption binaries. They were invisible to the standard user-space tools. I had to boot from a trusted live USB and mount the NVMe drives read-only to see the actual state of the filesystem.<\/p>\n<p>This is where you learn that &#8220;security-by-obscurity&#8221; is a lie told by people who want to sell you expensive appliances. The attackers knew the Linux VFS (Virtual File System) layer better than I did. They were using <code>iptables<\/code> to hide their own traffic.<\/p>\n<p>I found their custom rules hidden in a chain I didn&#8217;t recognize:<\/p>\n<pre class=\"codehilite\"><code class=\"language-bash\"># List all chains, including the ones they tried to hide\niptables -L -n -v --line-numbers\n# They had a rule dropping all traffic to the backup subnet except from their IP\niptables -A FORWARD -d 10.0.5.0\/24 -j DROP\n<\/code><\/pre>\n<p>They had effectively firewalled me out of my own backup network while they worked. It\u2019s a classic move. If you see a drop in traffic to your storage nodes, don&#8217;t assume the jobs are finished. Assume someone has cut the line.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Hardening_the_Kernel_sysctl_and_the_Illusion_of_Safety\"><\/span>Hardening the Kernel: sysctl and the Illusion of Safety<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>By hour 40, I started the rebuild. I wiped the nodes. I didn&#8217;t &#8220;clean&#8221; them; I nuked them from orbit. Reinstalling Debian 11 from a known-good ISO. But a default install is a death sentence. <\/p>\n<p>If you want to survive the next shift, you need to harden the network stack at the kernel level. The defaults in <code>\/etc\/sysctl.conf<\/code> are designed for connectivity, not security. They favor the &#8220;seamless&#8221; experience that marketing people love, which is just another word for &#8220;vulnerable.&#8221;<\/p>\n<p>Here is the <code>sysctl.conf<\/code> I hammered into the new nodes. If you change these, I will haunt you:<\/p>\n<pre class=\"codehilite\"><code class=\"language-conf\"># IP Spoofing protection\nnet.ipv4.conf.all.rp_filter = 1\nnet.ipv4.conf.default.rp_filter = 1\n\n# Ignore ICMP broadcast requests (prevents Smurf attacks)\nnet.ipv4.icmp_echo_ignore_broadcasts = 1\n\n# Disable source packet routing\nnet.ipv4.conf.all.accept_source_route = 0\nnet.ipv4.conf.default.accept_source_route = 0\n\n# Ignore send redirects\nnet.ipv4.conf.all.send_redirects = 0\nnet.ipv4.conf.default.send_redirects = 0\n\n# Block SYN flood attacks\nnet.ipv4.tcp_syncookies = 1\nnet.ipv4.tcp_max_syn_backlog = 2048\nnet.ipv4.tcp_synack_retries = 2\nnet.ipv4.tcp_syn_retries = 5\n\n# Log Martians (packets with impossible source addresses)\nnet.ipv4.conf.all.log_martians = 1\n<\/code><\/pre>\n<p>After applying these with <code>sysctl -p<\/code>, the network stack becomes significantly less &#8220;chatty&#8221; and far more resistant to the kind of reconnaissance the attackers used to map our internal routes. <\/p>\n<p>Another one of my <strong>cybersecurity tips<\/strong>: the kernel is your last line of defense. If you let it accept redirects or source-routed packets, you\u2019re basically letting the attacker rewrite your routing table from the outside. Don&#8217;t be that admin.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Rebuilding_the_Perimeter_iptables_and_SSH_Hardening\"><\/span>Rebuilding the Perimeter: iptables and SSH Hardening<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Hour 55. My eyes felt like they were full of broken glass. I had to rebuild the firewall rules. I threw out the &#8220;user-friendly&#8221; frontends like UFW or Firewalld. They add too much abstraction. I went back to raw <code>iptables<\/code>.<\/p>\n<p>I locked down the new Nginx 1.18.0 instances. No more &#8220;allow all&#8221; on port 80 and 443. I implemented rate limiting at the packet level to stop the brute-force attempts before they even hit the application layer.<\/p>\n<pre class=\"codehilite\"><code class=\"language-bash\"># Rate limit SSH to prevent brute force\niptables -A INPUT -p tcp --dport 22 -m state --state NEW -m recent --set\niptables -A INPUT -p tcp --dport 22 -m state --state NEW -m recent --update --seconds 60 --hitcount 4 -j DROP\n\n# Allow established connections\niptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT\n\n# Default Deny Policy\niptables -P INPUT DROP\niptables -P FORWARD DROP\niptables -P OUTPUT ACCEPT\n<\/code><\/pre>\n<p>Then I went for the <code>sshd_config<\/code>. The default OpenSSH 8.4p1 config on Debian is too permissive. I stripped it down. No passwords. No root login. No legacy ciphers.<\/p>\n<p>Edit <code>\/etc\/ssh\/sshd_config<\/code> and ensure these lines are set:<\/p>\n<pre class=\"codehilite\"><code class=\"language-conf\">PermitRootLogin no\nMaxAuthTries 3\nPubkeyAuthentication yes\nPasswordAuthentication no\nPermitEmptyPasswords no\nChallengeResponseAuthentication no\nUsePAM no\nKexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256\nCiphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com\nMACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com\n<\/code><\/pre>\n<p>By forcing Ed25519 keys and disabling PAM, you remove an entire class of credential-stuffing attacks. If a dev complains they can&#8217;t log in with their password, tell them to generate a key pair or find a new job. I don&#8217;t have the patience for &#8220;convenience&#8221; anymore. Convenience is what got us 72 hours of downtime and a $2 million ransom demand that we&#8217;re currently trying to ignore.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_Human_Element_Why_Users_are_the_Ultimate_Zero-Day\"><\/span>The Human Element: Why Users are the Ultimate Zero-Day<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>It\u2019s now hour 68. The systems are coming back online. The databases are being restored from the one physical tape drive I insisted on keeping in 2021\u2014the one the CTO called &#8220;an archaic waste of space.&#8221; Well, that archaic waste of space is currently saving the company.<\/p>\n<p>But here\u2019s the truth: I can harden the kernel, I can write the most elegant <code>iptables<\/code> rules, and I can lock down SSH until it\u2019s a digital fortress. None of it matters if a user in Accounting clicks on a &#8220;PDF&#8221; that is actually an executable.<\/p>\n<p>The final of my <strong>cybersecurity tips<\/strong> for you, kid: assume the user is already compromised. Segment the network so that Accounting can&#8217;t even see the Server VLAN. Use VLAN tagging and strict firewalling between departments. <\/p>\n<p>I found the original &#8220;patient zero&#8221; while I was tailing the mail logs.<\/p>\n<pre class=\"codehilite\"><code class=\"language-bash\"># Searching for the suspicious mail delivery\ngrep &quot;delivered&quot; \/var\/log\/mail.log | grep -i &quot;invoice&quot;\n<\/code><\/pre>\n<p>An &#8220;invoice&#8221; was sent to a junior clerk. It contained a macro that pulled a payload from a compromised WordPress site. That payload then scanned the local network for the Nginx vulnerability I mentioned earlier. It was a multi-stage execution that exploited human curiosity first and technical debt second.<\/p>\n<p>Modern security isn&#8217;t about building a bigger wall; it&#8217;s about building a house where every room is locked and requires a different key. If the attacker gets into the kitchen, they shouldn&#8217;t be able to get into the bedroom. <\/p>\n<p>I\u2019ve spent the last four hours writing a script to automate the auditing of <code>\/var\/log\/auth.log<\/code> and <code>\/var\/log\/syslog<\/code> across the cluster. It\u2019s a hacky Python script, but it works. It looks for patterns of lateral movement\u2014failed logins followed by a successful one from a new IP, or <code>sudo<\/code> commands that don&#8217;t match the user&#8217;s typical profile.<\/p>\n<pre class=\"codehilite\"><code class=\"language-python\"># A snippet of the logic I'm leaving you\nimport re\n\ndef detect_lateral_movement(log_file):\n    with open(log_file, 'r') as f:\n        for line in f:\n            if &quot;Accepted password&quot; in line:\n                # Logic to cross-reference IP with known management IPs\n                pass\n            if &quot;sudo: session opened&quot; in line:\n                # Logic to alert on unusual sudo timing\n                pass\n<\/code><\/pre>\n<p>It\u2019s not &#8220;AI-driven threat detection.&#8221; It\u2019s just basic logic. Don&#8217;t let the vendors sell you on &#8220;vibrant&#8221; dashboards and &#8220;multifaceted&#8221; analytics. If you can&#8217;t read the raw logs, you don&#8217;t know what&#8217;s happening on your boxes.<\/p>\n<p>The sun is coming up. I can hear the first of the office staff arriving. They\u2019ll complain that the internet is &#8220;slow&#8221; because I\u2019ve routed everything through a deep packet inspection proxy now. They\u2019ll complain that they have to use 2FA for every single internal service. Let them complain. Their convenience is the fuel for my nightmares.<\/p>\n<p>I\u2019m leaving my badge on the desk. The documentation for the new VLAN structure is in the red folder. Don&#8217;t lose it. If you see a spike in CPU usage on the SQL nodes that doesn&#8217;t correlate with user activity, don&#8217;t wait for an alert. Kill the process first and ask questions later. In this room, &#8220;shoot first&#8221; is the only policy that keeps the lights on.<\/p>\n<p>07:42 AM &#8211; The rebuild is holding. The coffee is cold. The next shift is your problem. Good luck, you&#8217;re going to need it.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Related_Articles\"><\/span>Related Articles<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Explore more insights and best practices:<\/p>\n<ul>\n<li><a href=\"https:\/\/itsupportwale.com\/blog\/what-is-kubernetes-a-complete-guide-to-orchestration\/\">What Is Kubernetes A Complete Guide To Orchestration<\/a><\/li>\n<li><a href=\"https:\/\/itsupportwale.com\/blog\/\">Blog<\/a><\/li>\n<li><a href=\"https:\/\/itsupportwale.com\/blog\/react-native-guide-build-high-performance-mobile-apps\/\">React Native Guide Build High Performance Mobile Apps<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>03:14 AM &#8211; The silence was the first sign. The Zabbix alerts didn&#8217;t trigger because the monitoring VM was the first to have its vmdk headers shredded. I only noticed because the hum of the drive arrays in Rack 4 changed pitch\u2014a frantic, high-frequency seeking sound that tells you the heads are working overtime to &#8230; <a title=\"10 Essential Cybersecurity Tips to Protect Your Data\" class=\"read-more\" href=\"https:\/\/itsupportwale.com\/blog\/10-essential-cybersecurity-tips-to-protect-your-data-2\/\" aria-label=\"Read more  on 10 Essential Cybersecurity Tips to Protect Your Data\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4719","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>10 Essential Cybersecurity Tips to Protect Your Data - ITSupportWale<\/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:\/\/itsupportwale.com\/blog\/10-essential-cybersecurity-tips-to-protect-your-data-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"10 Essential Cybersecurity Tips to Protect Your Data - ITSupportWale\" \/>\n<meta property=\"og:description\" content=\"03:14 AM &#8211; The silence was the first sign. The Zabbix alerts didn&#8217;t trigger because the monitoring VM was the first to have its vmdk headers shredded. I only noticed because the hum of the drive arrays in Rack 4 changed pitch\u2014a frantic, high-frequency seeking sound that tells you the heads are working overtime to ... 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