{"id":1148,"date":"2022-05-05T15:46:54","date_gmt":"2022-05-05T05:46:54","guid":{"rendered":"https:\/\/thedragon.kicks-ass.org\/?p=1148"},"modified":"2022-05-15T14:28:07","modified_gmt":"2022-05-15T04:28:07","slug":"build-loopback-raid-md","status":"publish","type":"post","link":"https:\/\/thedragon.kicks-ass.org\/?p=1148","title":{"rendered":"Build loopback raid md"},"content":{"rendered":"\n<p>Create Loop devices<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>cd \/tmp\ntruncate -s 1G L{1,2,3}.img\nlosetup --show -f L1.img\nlosetup --show -f L2.img\nlosetup --show -f L3.img<\/code><\/pre>\n\n\n\n<p>Create the Array<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mdadm --create --verbose \/dev\/md0 --level=1 --raid-devices=2 \/dev\/loop{0,1}\nmkfs.ext4 \/dev\/md0<\/code><\/pre>\n\n\n\n<p>Add 3<sup>rd<\/sup> Disk as Spare<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mdadm --add \/dev\/md0 \/dev\/loop2\nmdadm --detail \/dev\/md0<\/code><\/pre>\n\n\n\n<p>Convert Raid1 to Raid5 (reshape).<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mdadm --grow \/dev\/md0 --level=5 --raid-devices=3\ncat \/proc\/mdstat<\/code><\/pre>\n\n\n\n<p>Grow Filesystem to suit. Notice the Array and Used size changes after conversion.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mdadm --detail \/dev\/md0\nresize2fs \/dev\/md0<\/code><\/pre>\n\n\n\n<p>Cleanup Loopback interfaces \/ md devices<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mdadm --stop \/dev\/md0\nlosetup -d \/dev\/loop{0,1,2}\nrm -fv \/tmp\/L{1,2,3}.img<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Create Loop devices Create the Array Add 3rd Disk as Spare Convert Raid1 to Raid5 (reshape). Grow Filesystem to suit. Notice the Array and Used size changes after conversion. Cleanup Loopback interfaces \/ md devices<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[9,4],"tags":[],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p20dKL-iw","_links":{"self":[{"href":"https:\/\/thedragon.kicks-ass.org\/index.php?rest_route=\/wp\/v2\/posts\/1148"}],"collection":[{"href":"https:\/\/thedragon.kicks-ass.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thedragon.kicks-ass.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thedragon.kicks-ass.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/thedragon.kicks-ass.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1148"}],"version-history":[{"count":1,"href":"https:\/\/thedragon.kicks-ass.org\/index.php?rest_route=\/wp\/v2\/posts\/1148\/revisions"}],"predecessor-version":[{"id":1149,"href":"https:\/\/thedragon.kicks-ass.org\/index.php?rest_route=\/wp\/v2\/posts\/1148\/revisions\/1149"}],"wp:attachment":[{"href":"https:\/\/thedragon.kicks-ass.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1148"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thedragon.kicks-ass.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1148"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thedragon.kicks-ass.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1148"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}