{"id":1035,"date":"2015-06-22T17:41:16","date_gmt":"2015-06-22T21:41:16","guid":{"rendered":"http:\/\/www.bhargavs.com\/?p=1035"},"modified":"2015-06-22T17:41:16","modified_gmt":"2015-06-22T21:41:16","slug":"disk-performance-information-missing-on-windows-2012-r2-blast-from-the-past","status":"publish","type":"post","link":"https:\/\/bhargavs.com\/index.php\/2015\/06\/22\/disk-performance-information-missing-on-windows-2012-r2-blast-from-the-past\/","title":{"rendered":"Disk performance information missing on Windows 2012 R2 &#8211; Blast from the past!"},"content":{"rendered":"<p>Recently, I replaced a disk in my iScsi NAS. Since I wasn&#8217;t using any RAID on the disk I was replacing, I decided to copy data from old volume to new using robocopy. As my copy continued in the background, I curiously turned to the performance tab of task manager:<\/p>\n<p><a href=\"https:\/\/bhargavs.com\/wp-content\/uploads\/2015\/06\/image.png\"><img loading=\"lazy\" decoding=\"async\" title=\"image\" style=\"border-top: 0px; border-right: 0px; background-image: none; border-bottom: 0px; padding-top: 0px; padding-left: 0px; margin: 0px; border-left: 0px; display: inline; padding-right: 0px\" border=\"0\" alt=\"image\" src=\"https:\/\/bhargavs.com\/wp-content\/uploads\/2015\/06\/image_thumb.png\" width=\"244\" height=\"222\"\/><\/a><\/p>\n<p>As you may notice in the screenshot above, there was no disk information in the performance tab!<\/p>\n<p>I had a chuckle when I saw that. I remembered by Windows 2000 days and the trusty diskperf command. You can reference diskperf syntax on TechNet at <a title=\"https:\/\/technet.microsoft.com\/en-us\/library\/hh875645.aspx\" href=\"https:\/\/technet.microsoft.com\/en-us\/library\/hh875645.aspx\">https:\/\/technet.microsoft.com\/en-us\/library\/hh875645.aspx<\/a>.<\/p>\n<p>While the article claims \u201cIn Windows 2000, physical and logical disk performance counters are not enabled by default.\u201d, the same applies to Windows Server 2012 R2 and I am sure other Windows Server versions as well for obvious performance reasons. It is also worth noting, as <a href=\"http:\/\/www.hyper-v.nu\/archives\/author\/hvredevoort\/\">Hans Vredevroot<\/a> points out on <a href=\"http:\/\/www.hyper-v.nu\/archives\/hvredevoort\/2013\/11\/disk-performance-counters-in-windows-server-2012-r2-task-manager\/\">his blog<\/a>, the performance information on client OS such as Windows 8 is readily available by default.<\/p>\n<p>Anyhow, for my situation, all I had to do was, run diskperf \u2013y from elevated PowerShell (yes I don\u2019t use cmd anymore) and reload task manager. The disk information was visible now and I was able to see disk transfer rate and other relevant information:<\/p>\n<p><a href=\"https:\/\/bhargavs.com\/wp-content\/uploads\/2015\/06\/image1.png\"><img loading=\"lazy\" decoding=\"async\" title=\"image\" style=\"border-top: 0px; border-right: 0px; background-image: none; border-bottom: 0px; padding-top: 0px; padding-left: 0px; margin: 0px; border-left: 0px; display: inline; padding-right: 0px\" border=\"0\" alt=\"image\" src=\"https:\/\/bhargavs.com\/wp-content\/uploads\/2015\/06\/image_thumb1.png\" width=\"244\" height=\"222\"\/><\/a><\/p>\n<p>It is worth noting that when I ran the diskperf \u2013y, it claimed that the disk performance counters are automatically enabled \u201con demand\u201d:<\/p>\n<blockquote>\n<p>Both Logical and Physical Disk Performance counters on this system<br \/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; are automatically enabled on demand.<br \/>Raw counters are also enabled for IOCTL_DISK_PERFORMANCE.<\/p>\n<\/blockquote>\n<p>I wonder if that applies only to tools such as perfmon. Certainly the counters had to be explicitly enabled for task manager, so in which conditions are the counters enabled automatically? Something to think about for later\u2026<\/p>\n<p>Cheers!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Recently, I replaced a disk in my iScsi NAS. Since I wasn&#8217;t using any RAID on the disk I was replacing, I decided to copy data from old volume to [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"pgc_sgb_lightbox_settings":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[37],"tags":[109,282,286],"class_list":["post-1035","post","type-post","status-publish","format-standard","hentry","category-windows-server","tag-diskperf","tag-windows-server","tag-windows-server-2012-r2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Disk performance information missing on Windows 2012 R2 - Blast from the past! - Bhargav&#039;s IT Playground<\/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:\/\/bhargavs.com\/index.php\/2015\/06\/22\/disk-performance-information-missing-on-windows-2012-r2-blast-from-the-past\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Disk performance information missing on Windows 2012 R2 - Blast from the past! - Bhargav&#039;s IT Playground\" \/>\n<meta property=\"og:description\" content=\"Recently, I replaced a disk in my iScsi NAS. 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