{"id":1054,"date":"2015-12-08T09:17:37","date_gmt":"2015-12-08T00:17:37","guid":{"rendered":"http:\/\/matoken.org\/blog\/?p=1054"},"modified":"2015-12-08T09:17:37","modified_gmt":"2015-12-08T00:17:37","slug":"raspberry-pi-for-os-writing-tips-on-linux-environment","status":"publish","type":"post","link":"https:\/\/matoken.org\/blog\/2015\/12\/08\/raspberry-pi-for-os-writing-tips-on-linux-environment\/","title":{"rendered":"Linux \u74b0\u5883\u3067\u306e Raspberry Pi \u5411\u3051 OS \u66f8\u304d\u8fbc\u307fTips"},"content":{"rendered":"<p>\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u306f <a href=\"http:\/\/www.adventar.org\/calendars\/778\">Raspberry Pi Advent Calendar 2015<\/a> \u306e12\u670808\u65e5\u5206\u3067\u3059\uff0e<br \/>\n\u6628\u65e5\u306f @2box2bo\u3055\u3093\u306e <a href=\"http:\/\/www.zumwalt.info\/blog\/2015\/12\/raspberrypi-minecraft\/\">RaspberryPi\u3068\u516c\u5f0f\u30bf\u30c3\u30c1\u30c7\u30a3\u30b9\u30d7\u30ec\u30a4\u3067\u30de\u30a4\u30f3\u30af\u30e9\u30d5\u30c8\u3059\u308b\u304a\u8a71 | \u6d41\u9023\u8352\u4ea1<\/a> \u3067\u3057\u305f\uff0e\u516c\u5f0f\u30c7\u30a3\u30b9\u30d7\u30ec\u30a4\u6b32\u3057\u3044\u3067\u3059\u2026\u2026\uff0e<\/p>\n<p>\u6700\u8fd1 Raspberry Pi \u306f\u30b5\u30d6PC \u7684\u306b\u4f7f\u3063\u3066\u3066\u30cd\u30bf\u304c\u306a\u3044(\u666e\u901a\u306b Linux Desktop \u306a\u306e\u3067\u2026\u2026)\u306e\u3067\u7d19\u88fd\u30b1\u30fc\u30b9\u306e\u7d39\u4ecb\u3067\u3082\u3057\u3088\u3046\u304b\u3068\u601d\u3063\u3066\u3044\u305f\u306e\u3067\u3059\u304c\uff0cRaspberry Pi \u306b OS \u3092\u66f8\u304d\u8fbc\u3080\u306e\u306b\u3088\u304f\u4f7f\u3046 dd \u95a2\u9023\u306e\u30cd\u30bf\u304c\u5c11\u3057\u6e9c\u307e\u3063\u3066\u3044\u308b\u306e\u3067\u4eca\u56de\u306f\u3053\u308c\u3092\u7d39\u4ecb\u3057\u3088\u3046\u3068\u601d\u3044\u307e\u3059\uff0e\uff08NOOBS \u3060\u3068\u307b\u307c\u95a2\u4fc2\u306a\u304f\u30b3\u30d4\u30fc\u3059\u308b\u3060\u3051\u3067\u3044\u3044\u3093\u3067\u3059\u304c\u2026\u2026\uff09<br \/>\nRasbina jessie \/ Debian stretch \u3067\u691c\u8a3c\u3057\u3066\u3044\u307e\u3059\u304c\uff0cLinux \u306a\u3089\u5c0e\u5165\u624b\u9806\u4ee5\u5916\u540c\u3058\u3060\u3068\u601d\u3044\u307e\u3059\uff0eMac OS X \/ UNIX \u7cfb\u306e OS \u3067\u3082\u4f7f\u3048\u308b\u3068\u601d\u3044\u307e\u3059\uff0e<\/p>\n<p><!-- Place this tag in your head or just before your close body tag. --><\/p>\n<p><script type=\"text\/javascript\" src=\"https:\/\/apis.google.com\/js\/plusone.js\"><\/script><\/p>\n<p><!-- Place this tag where you want the widget to render. --><\/p>\n<div class=\"g-post\" data-href=\"https:\/\/plus.google.com\/+KenichiroMATOHARA\/posts\/UpwHBFmuzYJ\"><\/div>\n<p><small>&#8211; \u7d19\u30b1\u30fc\u30b9\u306e\u4e00\u4f8b &#8211;<\/small><\/p>\n<p>dd(dataset definition) \u306f GNU Coreutils \u306e\u4e2d\u306b\u5165\u3063\u3066\u3044\u308b\u306e\u3067\u307b\u3068\u3093\u3069\u306e GNU\/Linux \u3060\u3068\u6a19\u6e96\u3067\u5c0e\u5165\u3055\u308c\u3066\u3044\u308b\u3068\u601d\u3044\u307e\u3059\uff0e\u3068\u3066\u3082\u4fbf\u5229\u3060\u3051\u3069\u4f7f\u3044\u65b9\u3092\u8aa4\u308b\u3068\u30b7\u30b9\u30c6\u30e0\u3084\u30c7\u30fc\u30bf\u3092\u3044\u3068\u3082\u7c21\u5358\u306b\u58ca\u3057\u3066\u3057\u307e\u3048\u307e\u3059\uff0e\u6ce8\u610f\u3057\u3066\u5b9f\u884c\u3057\u307e\u3057\u3087\u3046\uff0e  <\/p>\n<ul>\n<li><a href=\"http:\/\/www.gnu.org\/software\/coreutils\/coreutils.html\">Coreutils &#8211; GNU core utilities<\/a><\/li>\n<\/ul>\n<h1 id=\"_1\">\u9032\u6357\u72b6\u6cc1\u78ba\u8a8d<\/h1>\n<p>dd \u3067 sd \u66f8\u304d\u8fbc\u307f\u4e2d\u306b\u3069\u306e\u304f\u3089\u3044\u9032\u3093\u3060\u306e\u3060\u308d\u3046\u3068\u78ba\u8a8d\u3057\u305f\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\uff0e<\/p>\n<h2 id=\"kill-sigusr1\">kill -SIGUSR1<\/h2>\n<p>dd \u306e\u30d7\u30ed\u30bb\u30b9\u306b\u5bfe\u3057\u3066 <code>SIGUSR1<\/code> \u30b7\u30b0\u30ca\u30eb\u3092\u6295\u3052\u308b\u3068\u9032\u6357\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\uff0e<\/p>\n<p>dd \u306e\u30d7\u30ed\u30bb\u30b9\u756a\u53f7\u3092\u78ba\u8a8d<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>ps -ef<span class=\"p\">|<\/span>grep dd\r\n   :\r\nroot      <span class=\"m\">9273<\/span> <span class=\"m\">32218<\/span>  <span class=\"m\">0<\/span> 17:57 pts\/1    00:00:00 sudo dd <span class=\"nv\">of<\/span><span class=\"o\">=<\/span>\/dev\/sdz <span class=\"nv\">bs<\/span><span class=\"o\">=<\/span>4M\r\nroot      <span class=\"m\">9276<\/span>  <span class=\"m\">9273<\/span>  <span class=\"m\">9<\/span> 17:57 pts\/1    00:00:00 dd <span class=\"nv\">of<\/span><span class=\"o\">=<\/span>\/dev\/sdz <span class=\"nv\">bs<\/span><span class=\"o\">=<\/span>4M\r\n<\/pre>\n<\/div>\n<p><code>9276<\/code> \u306a\u306e\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306b<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>sudo <span class=\"nb\">kill<\/span> -USR1 9276\r\n<\/pre>\n<\/div>\n<p>\u3067\uff0c\u3053\u3093\u306a\u611f\u3058\u306b\u8868\u793a\u3055\u308c\u307e\u3059\uff0e<\/p>\n<div class=\"codehilite\">\n<pre>0+243258 \u30ec\u30b3\u30fc\u30c9\u5165\u529b\r\n0+243258 \u30ec\u30b3\u30fc\u30c9\u51fa\u529b\r\n1224679424 \u30d0\u30a4\u30c8 (1.2 GB) \u30b3\u30d4\u30fc\u3055\u308c\u307e\u3057\u305f\u3001 17.2794 \u79d2\u3001 70.9 MB\/\u79d2\r\n0+302681 \u30ec\u30b3\u30fc\u30c9\u5165\u529b\r\n0+302681 \u30ec\u30b3\u30fc\u30c9\u51fa\u529b\r\n1532985344 \u30d0\u30a4\u30c8 (1.5 GB) \u30b3\u30d4\u30fc\u3055\u308c\u307e\u3057\u305f\u3001 20.8063 \u79d2\u3001 73.7 MB\/\u79d2\r\n<\/pre>\n<\/div>\n<p>\u306a\u306e\u3067\u3053\u3093\u306a\u3068\u304b<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>sudo pkill -SIGUSR1 ^dd\r\n<\/pre>\n<\/div>\n<p>\u3053\u3093\u306a\u611f\u3058\u3067\u53e9\u304f\u3068\u826f\u3044\u611f\u3058\u3060\u3068\u601d\u3044\u307e\u3059\uff0e<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"c\">% watch -n30 &#39;sudo pkill -SIGUSR1 ^dd`<\/span>\r\n<\/pre>\n<\/div>\n<h2 id=\"pvpipe-viewer\">pv(Pipe Viewer)<\/h2>\n<p>pv(Pipe Viewer) \u3068\u3044\u3046\u30d1\u30a4\u30d7\u306e\u72b6\u6cc1\u3092\u78ba\u8a8d\u3067\u304d\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u3042\u308a\u307e\u3059\uff0edd \u306e\u9593\u306b\u3053\u308c\u3092\u631f\u3093\u3067\u9032\u6357\u72b6\u6cc1\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\uff0e<\/p>\n<ul>\n<li><a href=\"http:\/\/www.ivarch.com\/programs\/pv.shtml\">ivarch.com: Pipe Viewer<\/a><\/li>\n<\/ul>\n<p>\u5c0e\u5165<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>apt install pv\r\n<\/pre>\n<\/div>\n<p>\u5229\u7528\u4f8b<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"c\">% zcat 2015-11-21-raspbian-jessie.zip | pv | sudo dd of=\/dev\/sdz bs=4M<\/span>\r\n<span class=\"mf\">5.81<\/span><span class=\"n\">GB<\/span> <span class=\"mi\">0<\/span><span class=\"p\">:<\/span><span class=\"mi\">06<\/span><span class=\"p\">:<\/span><span class=\"mi\">12<\/span> <span class=\"p\">[<\/span><span class=\"mf\">15.2<\/span><span class=\"n\">MB<\/span><span class=\"o\">\/<\/span><span class=\"n\">s<\/span><span class=\"p\">]<\/span> <span class=\"p\">[<\/span>                           <span class=\"o\">&lt;<\/span><span class=\"p\">=<\/span><span class=\"o\">&gt;<\/span>                      <span class=\"p\">]<\/span>\r\n<\/pre>\n<\/div>\n<p><code>-N<\/code> \u3067 \u540d\u524d\u306e\uff0c<code>-c<\/code> \u3067\u30af\u30e9\u30b9\u30bf\u30aa\u30d7\u30b7\u30e7\u30f3\u306b\u306a\u308a\u307e\u3059\uff0e\u3053\u308c\u3092\u6d3b\u7528\u3059\u308b\u3068\u8907\u6570\u306e\u30d1\u30a4\u30d7\u306e\u76e3\u8996\u3082\u3067\u304d\u307e\u3059\uff0e<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>zcat .\/2015-11-21-raspbian-jessie.zip <span class=\"p\">|<\/span> pv -cN zcat <span class=\"p\">|<\/span> xz <span class=\"p\">|<\/span> pv -cN xz <span class=\"p\">|<\/span> dd <span class=\"nv\">of<\/span><span class=\"o\">=<\/span>.\/2015-11-21-raspbian-jessie.xz\r\n     zcat: 8.41MB 0:00:05 <span class=\"o\">[<\/span>1.09MB\/s<span class=\"o\">]<\/span> <span class=\"o\">[<\/span>   &lt;<span class=\"o\">=<\/span>&gt;                                   <span class=\"o\">]<\/span>\r\n       xz: 3.96MB 0:00:05 <span class=\"o\">[<\/span>1.06MB\/s<span class=\"o\">]<\/span> <span class=\"o\">[<\/span>   &lt;<span class=\"o\">=<\/span>&gt;                                   <span class=\"o\">]<\/span>\r\n<\/pre>\n<\/div>\n<h2 id=\"gnu-ddrescue-ddrescue\">GNU ddrescue \/ ddrescue<\/h2>\n<p>dd \u3058\u3083\u306a\u3044\u3051\u3069 dd \u306e\u4ee3\u308f\u308a\u306b <code>GNU ddrescue<\/code> \u3092\u5229\u7528\u3059\u308b\u3068\u30d7\u30ed\u30b0\u30ec\u30b9\u304c\u8868\u793a\u3055\u308c\u307e\u3059\uff0e<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>sudo apt install gddrescue\r\n<span class=\"nv\">$ <\/span>sudo ddrescue \/dev\/zero \/dev\/null --force\r\nGNU ddrescue 1.19\r\nPress Ctrl-C to interrupt\r\nrescued:     <span class=\"m\">2969<\/span> MB,  errsize:       <span class=\"m\">0<\/span> B,  current rate:     <span class=\"m\">354<\/span> MB\/s\r\n   ipos:     <span class=\"m\">2969<\/span> MB,   errors:       0,    average rate:     <span class=\"m\">742<\/span> MB\/s\r\n   opos:     <span class=\"m\">2969<\/span> MB, run <span class=\"nb\">time<\/span>:       <span class=\"m\">4<\/span> s,  successful <span class=\"nb\">read<\/span>:       <span class=\"m\">0<\/span> s ago\r\nCopying non-tried blocks... Pass <span class=\"m\">1<\/span> <span class=\"o\">(<\/span>forwards<span class=\"o\">)<\/span>\r\n<\/pre>\n<\/div>\n<p>\u3067\u3082\u6a19\u6e96\u6709\u529b\u5165\u529b\u3092\u53d7\u3051\u4ed8\u3051\u306a\u3044\u3088\u3046\u3067\u3059\uff0e<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>zcat .\/2015-11-21-raspbian-jessie.zip <span class=\"p\">|<\/span> sudo ddrescue - \/dev\/sdz --force\r\nddrescue: Can<span class=\"err\">&#39;<\/span>t open input file: No such file or directory\r\n<\/pre>\n<\/div>\n<p>\u985e\u4f3c\u306e <code>ddrescue<\/code> \u3060\u3068\u6a19\u6e96\u5165\u529b\u3082OK\u306a\u3088\u3046\u3067\u3059\uff0e\u3053\u3061\u3089\u306e\u5834\u5408\u306e\u30b3\u30de\u30f3\u30c9\u540d\u306f <code>dd_rescue<\/code> \u3067\u3059\uff0e<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>sudo apt install ddrescue\r\n<span class=\"nv\">$ <\/span>zcat .\/2015-11-21-raspbian-jessie.zip <span class=\"p\">|<\/span> sudo dd_rescue - \/dev\/sdz\r\ndd_rescue: <span class=\"o\">(<\/span>warning<span class=\"o\">)<\/span>: input  file is not seekable!\r\ndd_rescue: <span class=\"o\">(<\/span>warning<span class=\"o\">)<\/span>: Illegal seek\r\ndd_rescue: <span class=\"o\">(<\/span>warning<span class=\"o\">)<\/span>: Don<span class=\"err\">&#39;<\/span>t use sparse writes <span class=\"k\">for<\/span> non-seekable output\r\ndd_rescue: <span class=\"o\">(<\/span>info<span class=\"o\">)<\/span>: ipos:     91136.0k, opos:     91136.0k, xferd:     91136.0k\r\n                   errs:      0, errxfer:         0.0k, succxfer:     91136.0k\r\n             +curr.rate:   144981kB\/s, avg.rate:   144776kB\/s, avg.load: 38.4%\r\n<\/pre>\n<\/div>\n<h1 id=\"dd\">dd\u3059\u308b\u3068\u91cd\u3044\/\u56fa\u307e\u308b<\/h1>\n<p>\u74b0\u5883\u306b\u3088\u3063\u3066 dd \u5b9f\u884c\u4e2d\u306b\u3068\u3066\u3082\u91cd\u304f\u306a\u3063\u3066\u30de\u30a6\u30b9\u30ab\u30fc\u30bd\u30eb\u3055\u3048\u30ab\u30af\u30ab\u30af\u52d5\u304f\u3088\u3046\u306b\u306a\u308a\u4e26\u884c\u3057\u3066\u5225\u306e\u4f5c\u696d\u304c\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u307e\u3059\uff0e<\/p>\n<h2 id=\"ionice\">ionice<\/h2>\n<p>ionice \u3092\u4f7f\u3063\u3066 dd \u306e\u512a\u5148\u5ea6\u3092\u4e0b\u3052\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff0e<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"c\">% zcat .\/2015-11-21-raspbian-jessie.zip | sudo ionice -c2 -n7 dd of=\/dev\/sdz<\/span>\r\n<\/pre>\n<\/div>\n<h2 id=\"pv-l\">pv -L<\/h2>\n<p>pv \u30b3\u30de\u30f3\u30c9\u306e -L \u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u30d1\u30a4\u30d7\u306e\u5e2f\u57df\u5236\u9650\u304c\u3067\u304d\u307e\u3059\uff0e<\/p>\n<blockquote>\n<div class=\"codehilite\">\n<pre>   -L RATE, --rate-limit RATE\r\n          Limit the transfer to a maximum of RATE bytes per second.  A suffix of &quot;k&quot;, &quot;m&quot;, &quot;g&quot;,  or  &quot;t&quot;  can  be\r\n          added to denote kilobytes (*1024), megabytes, and so on.\r\n<\/pre>\n<\/div>\n<\/blockquote>\n<div class=\"codehilite\">\n<pre><span class=\"c\">% zcat cros.img.gz | pv -L 8192k | sudo dd of=\/dev\/sdz<\/span>\r\n<\/pre>\n<\/div>\n<h2 id=\"cgroup\">cgroup<\/h2>\n<p>\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e cgroups \u3067\u66f8\u304d\u8fbc\u307f\u5e2f\u57df\u5236\u9650\u3092\u3057\u3066\u307f\u307e\u3059\uff0e\u4ee5\u4e0b\u306f dd \u3068\u3044\u3046\u30b0\u30eb\u30fc\u30d7\u3092\u4f5c\u6210\u3057\uff0c\u81ea\u5206\u306e\u30b7\u30a7\u30eb\u3092\u305d\u3053\u306b\u767b\u9332\uff0eSD Card \u306e\u30c7\u30d0\u30a4\u30b9\u3092\u66f8\u304d\u8fbc\u307f\u5236\u9650 1k \u3067\u8a2d\u5b9a\u3057\uff0cdd \u3067\u52d5\u4f5c\u78ba\u8a8d\u3092\u3057\u307e\u3057\u305f\uff0e\u60f3\u5b9a\u901a\u308a 1kB\/s \u3057\u304b\u51fa\u306a\u304b\u3063\u305f\u3088\u3046\u3067\u3059\uff0e<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>sudo mkdir \/sys\/fs\/cgroup\/blkio\/dd\r\n<span class=\"nv\">$ <\/span><span class=\"nb\">echo<\/span> <span class=\"nv\">$$<\/span> <span class=\"p\">|<\/span> sudo tee -a \/sys\/fs\/cgroup\/blkio\/dd\/tasks \r\n26041\r\n<span class=\"nv\">$ <\/span>ls -l \/dev\/sdz\r\nbrw-rw---- <span class=\"m\">1<\/span> root disk 179, <span class=\"m\">0<\/span> 12\u6708  <span class=\"m\">6<\/span> 18:42 \/dev\/sdz\r\n<span class=\"nv\">$ <\/span><span class=\"nb\">echo<\/span> <span class=\"s2\">&quot;179:0 1024&quot;<\/span> <span class=\"p\">|<\/span> sudo tee -a \/sys\/fs\/cgroup\/blkio\/dd\/blkio.throttle.write_bps_device \r\n179:0 1024\r\n<span class=\"nv\">$ <\/span>sudo dd <span class=\"k\">if<\/span><span class=\"o\">=<\/span>\/dev\/zero <span class=\"nv\">of<\/span><span class=\"o\">=<\/span>\/dev\/sdz <span class=\"nv\">bs<\/span><span class=\"o\">=<\/span>4k <span class=\"nv\">count<\/span><span class=\"o\">=<\/span>10\r\n10+0 \u30ec\u30b3\u30fc\u30c9\u5165\u529b\r\n10+0 \u30ec\u30b3\u30fc\u30c9\u51fa\u529b\r\n<span class=\"m\">40960<\/span> \u30d0\u30a4\u30c8 <span class=\"o\">(<\/span><span class=\"m\">41<\/span> kB<span class=\"o\">)<\/span> \u30b3\u30d4\u30fc\u3055\u308c\u307e\u3057\u305f\u3001 40.0136 \u79d2\u3001 1.0 kB\/\u79d2\r\n<\/pre>\n<\/div>\n<h1 id=\"_2\">\u66f8\u304d\u8fbc\u307f\u901f\u5ea6\u304c\u9045\u3044<\/h1>\n<h2 id=\"_3\">\u30d6\u30ed\u30c3\u30af\u30b5\u30a4\u30ba\u5909\u66f4<\/h2>\n<p>dd \u30b3\u30de\u30f3\u30c9\u306f\u30d6\u30ed\u30c3\u30af\u30b5\u30a4\u30ba\u304c 512\u30d0\u30a4\u30c8\u3068\u5c0f\u3055\u3044\u3067\u3059\uff0e\u3053\u306e\u30b5\u30a4\u30ba\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u30671\u5ea6\u306b\u51e6\u7406\u3059\u308b\u5bb9\u91cf\u304c\u591a\u304f\u306a\u308a\u901f\u5ea6\u304c\u6539\u5584\u3055\u308c\u307e\u3059\uff0e\u3053\u306e\u30b5\u30a4\u30ba\u306f <code>bs<\/code> \u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u8a2d\u5b9a\u3067\u304d\u307e\u3059\uff0e\u898f\u5b9a\u5024\u3068\u540c\u3058 512\u30d0\u30a4\u30c8\u306e\u5834\u5408\u306f\uff0c <code>bs=512<\/code>\uff0e1MB \u306e\u5834\u5408\u306f <code>bs=1M<\/code> \u3068\u3044\u3046\u3088\u3046\u306b\u3057\u3066\u5bb9\u91cf\u306e\u5358\u4f4d\uff08Y\u307e\u3067!)\u3082\u6307\u5b9a\u3067\u304d\u307e\u3059\uff0e\u6700\u8fd1\u306e\u79c1\u306f 4~16M \u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\uff0e<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>zcat 2015-11-21-raspbian-jessie.zip <span class=\"p\">|<\/span> sudo dd <span class=\"nv\">of<\/span><span class=\"o\">=<\/span>\/dev\/sdz <span class=\"nv\">bs<\/span><span class=\"o\">=<\/span>4M\r\n<\/pre>\n<\/div>\n<h2 id=\"gnu-ddrescue\">GNU ddrescue<\/h2>\n<p>GNU ddrescue \u306f\u52b9\u7387\u306e\u3044\u3044\u51e6\u7406\u3092\u81ea\u52d5\u7684\u306b\u884c\u3046\u305d\u3046\u3067\u3059\uff0e\u52b9\u7387\u306e\u826f\u3044\u30d6\u30ed\u30c3\u30af\u30b5\u30a4\u30ba\u3092\u63a2\u3059\u3088\u308a\u3053\u308c\u3092\u5c0e\u5165\u3057\u305f\u307b\u3046\u304c\u65e9\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\uff0e<\/p>\n<h1 id=\"_4\">\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u60c5\u5831\u306e\u524a\u9664<\/h1>\n<p>OS \u30a4\u30e1\u30fc\u30b8\u3092\u3053\u308c\u307e\u3067\u4f7f\u3063\u3066\u3044\u305f SD \u306b\u4e0a\u66f8\u304d\u3059\u308b\u3068\u53e4\u3044\u30c7\u30fc\u30bf\u304c\u6b8b\u3063\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\uff0e\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u60c5\u5831\u3092\u524a\u9664\u3057\u3066\u304b\u3089\u66f8\u304d\u8fbc\u3080\u3068\u7dba\u9e97\u306b\u884c\u304f\u3088\u3046\u3067\u3059\uff0e<\/p>\n<p>Windows\/Mac OS X \u306e\u5834\u5408\u306f SD Assosietion \u304c\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u3092\u63d0\u4f9b\u3057\u3066\u3044\u308b\u306e\u3067\u3053\u308c\u3092\u5229\u7528\u3059\u308b\u3068\u826f\u3044\u3068\u601d\u3044\u307e\u3059\uff0e<\/p>\n<ul>\n<li><a href=\"https:\/\/www.sdcard.org\/downloads\/formatter_4\/index.html\">SD Card Formatter &#8211; SD Association<\/a><\/li>\n<\/ul>\n<h2 id=\"dd_1\">dd<\/h2>\n<p>dd \u30b3\u30de\u30f3\u30c9\u3067\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u60c5\u5831\u304c\u5165\u3063\u3066\u3044\u308b\u3067\u3042\u308d\u3046\u5148\u982d\u90e8\u5206\u3092\u6d88\u3057\u307e\u3059\uff0e\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f 1M \u3092 1\u56de\u306a\u306e\u3067\u5148\u982d\u306e 1M \u304c 0 \u3067\u57cb\u3081\u3089\u308c\u307e\u3059\uff0e2\u884c\u76ee\u306e <code>hdparm<\/code> \u306f\u304a\u307e\u3058\u306a\u3044\u3067 kernel \u306b\u66f8\u304d\u63db\u308f\u3063\u305f\u3088\u3068\u6559\u3048\u3066\u3042\u3052\u3066\u3044\u307e\u3059\uff0e\u6700\u8fd1\u306f\u5373\u6642\u53cd\u6620\u3055\u308c\u308b\u3088\u3046\u306a\u611f\u3058\u3067\u3059\u304c\uff0c\u4ee5\u524d\u306f\u3053\u308c\u3092\u53e9\u304b\u306a\u3044\u3068\u3046\u307e\u304f\u53cd\u6620\u3055\u308c\u306a\u3044\u3053\u3068\u304c\u591a\u304b\u3063\u305f\u3067\u3059\uff0e(\u3044\u3061\u3044\u3061\u629c\u304d\u5dee\u3057\u3057\u3066\u307f\u305f\u308a)<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>sudo dd <span class=\"k\">if<\/span><span class=\"o\">=<\/span>\/dev\/zero <span class=\"nv\">of<\/span><span class=\"o\">=<\/span>\/dev\/sdz <span class=\"nv\">bs<\/span><span class=\"o\">=<\/span>1M <span class=\"nv\">count<\/span><span class=\"o\">=<\/span>1\r\n<span class=\"nv\">$ <\/span>sudo hdparm -z \/dev\/sdz\r\n<\/pre>\n<\/div>\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306b <code>count<\/code> \u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u306f\u5168\u9818\u57df\u66f8\u304d\u8fbc\u307f\u307e\u3059\uff0e\u6642\u9593\u306f\u304b\u304b\u308b\u3051\u3069\u78ba\u5b9f?<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>sudo dd <span class=\"nv\">of<\/span><span class=\"o\">=<\/span>\/dev\/zero <span class=\"nv\">of<\/span><span class=\"o\">=<\/span>\/dev\/sdz <span class=\"nv\">bs<\/span><span class=\"o\">=<\/span>10M\r\n<\/pre>\n<\/div>\n<p>\u5168\u9818\u57df\u66f8\u304d\u8fbc\u3080\u5834\u5408\u306f <code>shred -z \/dev\/sdz<\/code> \u3067\u3082\u826f\u3044\u3067\u3059\u306d\uff0e<\/p>\n<h2 id=\"wipefs\">wipefs<\/h2>\n<p>wipefs \u306f\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u60c5\u5831\u306e wipe \u3092\u3057\u3066\u304f\u308c\u308b\u30c4\u30fc\u30eb\u3067\u3059\uff0e\u4e00\u77ac\u3067\u52d5\u4f5c\u3059\u308b\u3057\u4fbf\u5229\u3067\u3059\uff0e<br \/>\n<code>util-linux<\/code> \u30d1\u30c3\u30b1\u30fc\u30b8\u5185\u306e <code>wipefs<\/code> \u3067\u3059\uff0e<\/p>\n<p>\u30c7\u30d0\u30a4\u30b9\u3060\u3051\u6307\u5b9a\u3057\u3066\u5b9f\u884c\u3059\u308b\u3068\u73fe\u5728\u306e\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u306e\u72b6\u6cc1\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\uff0e<code>-a<\/code> \u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u60c5\u5831\u304c\u524a\u9664\u3055\u308c\u307e\u3059\uff0e\u4fbf\u5229\uff0e<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"err\">$<\/span> <span class=\"n\">sudo<\/span> <span class=\"n\">wipefs<\/span> <span class=\"o\">\/<\/span><span class=\"n\">dev<\/span><span class=\"o\">\/<\/span><span class=\"n\">sdz<\/span>\r\n<span class=\"n\">offset<\/span>               <span class=\"n\">type<\/span>\r\n<span class=\"o\">----------------------------------------------------------------<\/span>\r\n<span class=\"mh\">0x1fe<\/span>                <span class=\"n\">dos<\/span>   <span class=\"p\">[<\/span><span class=\"n\">partition<\/span> <span class=\"n\">table<\/span><span class=\"p\">]<\/span>\r\n\r\n<span class=\"err\">$<\/span> <span class=\"n\">sudo<\/span> <span class=\"n\">wipefs<\/span> <span class=\"o\">-<\/span><span class=\"n\">a<\/span> <span class=\"o\">\/<\/span><span class=\"n\">dev<\/span><span class=\"o\">\/<\/span><span class=\"n\">sdz<\/span>\r\n<span class=\"o\">\/<\/span><span class=\"n\">dev<\/span><span class=\"o\">\/<\/span><span class=\"nl\">sdz<\/span><span class=\"p\">:<\/span> <span class=\"mi\">2<\/span> <span class=\"n\">bytes<\/span> <span class=\"n\">were<\/span> <span class=\"n\">erased<\/span> <span class=\"n\">at<\/span> <span class=\"n\">offset<\/span> <span class=\"mh\">0x000001fe<\/span> <span class=\"p\">(<\/span><span class=\"n\">dos<\/span><span class=\"p\">)<\/span><span class=\"o\">:<\/span> <span class=\"mi\">55<\/span> <span class=\"n\">aa<\/span>\r\n<span class=\"o\">\/<\/span><span class=\"n\">dev<\/span><span class=\"o\">\/<\/span><span class=\"nl\">sdz<\/span><span class=\"p\">:<\/span> <span class=\"n\">calling<\/span> <span class=\"n\">ioctl<\/span> <span class=\"n\">to<\/span> <span class=\"n\">re<\/span><span class=\"o\">-<\/span><span class=\"n\">read<\/span> <span class=\"n\">partition<\/span> <span class=\"nl\">table<\/span><span class=\"p\">:<\/span> <span class=\"err\">\u6210\u529f\u3067\u3059<\/span>\r\n<span class=\"err\">$<\/span> <span class=\"n\">sudo<\/span> <span class=\"n\">wipefs<\/span> <span class=\"o\">\/<\/span><span class=\"n\">dev<\/span><span class=\"o\">\/<\/span><span class=\"n\">sdz<\/span>\r\n<\/pre>\n<\/div>\n<h1 id=\"mountscript\">mount\u4e2d\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306b\u66f8\u304d\u8fbc\u3082\u3046\u3068\u3059\u308b\u3068\u7d42\u4e86\u3059\u308bscript<\/h1>\n<p>dd \u306f\u4fbf\u5229\u3067\u3059\u304c\uff0c\u66f8\u304d\u8fbc\u307f\u5148\u3092\u9593\u9055\u3048\u308b\u3068\u30b7\u30b9\u30c6\u30e0\u3084\u30c7\u30fc\u30bf\u3092\u7834\u58ca\u3057\u3066\u3057\u307e\u3044\u307e\u3059\uff0e\u79c1\u3082\u3064\u3044\u4e00\u6628\u65e5\u3084\u3063\u3066\u3057\u307e\u3044\u307e\u3057\u305forz<br \/>\n\uff03\u4f55\u6545\u304b \/dev\/mmcblk0 \u304c \/dev\/sda \u3078\u306e\u30b7\u30f3\u30dc\u30ea\u30c3\u30af\u30ea\u30f3\u30af\u3068\u306a\u3063\u3066\u3044\u305f\uff0e<br \/>\n600GB \u306e \u5148\u982d 1.5GB \u3060\u304b\u3089\u30c7\u30fc\u30bf\u306f\u307b\u3068\u3093\u3069\u6551\u51fa\u3067\u304d\u308b\u3060\u308d\u3046\u3068\u601d\u3063\u305f\u306e\u3067\u3059\u304c\uff0cLUKS \u3067\u6697\u53f7\u5316\u3057\u3066\u3044\u305f\u306e\u3067\u30e1\u30bf\u30c7\u30fc\u30bf\u304c\u7834\u58ca\u3055\u308c\u5fa9\u65e7\u306f\u7121\u7406\u305d\u3046\u3067\u3059\uff0e\u5e78\u3044\u30c7\u30a4\u30ea\u30fc\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u304c\u3042\u308b\u306e\u3067\u305d\u3061\u3089\u304b\u3089\u5fa9\u65e7\u4e2d\u3067\u3059\uff0e<br \/>\n\uff08\u5fa9\u65e7\u4e2d\u306a\u306e\u306b\u3069\u3046\u3084\u3063\u3066\u66f8\u3044\u3066\u3044\u308b\u304b\u3068\u3044\u3046\u3068 Raspberry Pi 2 B \u306b\u30ad\u30fc\u30dc\u30fc\u30c9\u30de\u30a6\u30b9\u30e2\u30cb\u30bf\u53d6\u308a\u4ed8\u3051\u3066 <code>ReText<\/code> \u3067\u66f8\u3044\u3066\u3044\u307e\u3059\uff0eWeb \u306f midori \u3067\u3082\u91cd\u3044\u306e\u3067 <code>ssh -CY<\/code> \u3057\u3066\u30d5\u30a1\u30a4\u30eb\u30b5\u30fc\u30d0\u306e\u30d6\u30e9\u30a6\u30b6\u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\uff0e\u4f7f\u3044\u6163\u308c\u306a\u3044\u30ad\u30fc\u30dc\u30fc\u30c9\u304c\u4e0d\u4fbf\u3067\u3059&gt;&lt;\uff09<\/p>\n<p>\u3053\u3046\u3044\u3046\u60b2\u3057\u3044\u3053\u3068\u304c\u8d77\u3053\u3089\u306a\u3044\u3088\u3046\u306b\u3067\u304d\u306a\u3044\u3082\u306e\u304b\u3068 mount \u4e2d\u306e\u30c7\u30d0\u30a4\u30b9\u306b\u66f8\u304d\u8fbc\u3082\u3046\u3068\u3059\u308b\u3068\u5931\u6557\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308c\u3070\u3044\u3044\u306e\u3067\u306f?\u3068\u601d\u3063\u305f\u306e\u3067\u3059\u304c\u305d\u3046\u3044\u3063\u305f\u30aa\u30d7\u30b7\u30e7\u30f3\u306a\u3069\u304c\u898b\u5f53\u305f\u308a\u307e\u305b\u3093\u3067\u3057\u305f\uff0e<br \/>\n\u305d\u308c\u3063\u307d\u3044script \u3092\u66f8\u3044\u3066\u307f\u307e\u3057\u305f\uff0e<\/p>\n<p><script src=\"https:\/\/gist.github.com\/matoken\/e051cefb78594520038d.js\"><\/script><\/p>\n<p>\u5229\u7528\u65b9\u6cd5\u306f\uff0c<code>\/usr\/local\/bin\/dd<\/code> \u3068\u3057\u3066\u3053\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u7528\u610f\u3057\u3066\u5b9f\u884c\u6a29\u3092\u3064\u3051\u3066\u304a\u3044\u3066\u901a\u5e38\u306e dd \u30b3\u30de\u30f3\u30c9\u306e\u3088\u3046\u306b\u4f7f\u3046\u3060\u3051\u3067\u3059\uff0e<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>wget -O - https:\/\/gist.githubusercontent.com\/matoken\/e051cefb78594520038d\/raw\/9ac20f31c590a043f1774f82068a99846ab7c4bb\/dd.sh <span class=\"p\">|<\/span> sudo tee \/usr\/local\/bin\/dd\r\n<span class=\"nv\">$ <\/span>sudo chmod +x \/usr\/local\/bin\/dd\r\n<span class=\"nv\">$ <\/span>which dd\r\n\/usr\/local\/bin\/dd\r\n<span class=\"nv\">$ <\/span>sudo which dd\r\n\/usr\/local\/bin\/dd\r\n<\/pre>\n<\/div>\n<p>\u30de\u30a6\u30f3\u30c8\u72b6\u614b\u3067\u66f8\u304d\u8fbc\u3082\u3046\u3068\u3059\u308b\u3068\u5931\u6557\u3059\u308b\uff0e<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>sudo dd <span class=\"k\">if<\/span><span class=\"o\">=<\/span>\/dev\/zero <span class=\"nv\">of<\/span><span class=\"o\">=<\/span>\/dev\/sdz\r\n\/dev\/sdz seems to specify the file system in the mount.\r\nForce Quit.\r\n<\/pre>\n<\/div>\n<p>\u30a2\u30f3\u30de\u30a6\u30f3\u30c8\u3057\u3066\u518d\u5b9f\u884c\u3059\u308b\u3068 dd \u304c\u958b\u59cb\u3055\u308c\u308b\uff0e<\/p>\n<div class=\"codehilite\">\n<pre><span class=\"nv\">$ <\/span>sudo umount \/dev\/sdz1 \r\n<span class=\"nv\">$ <\/span>sudo dd <span class=\"k\">if<\/span><span class=\"o\">=<\/span>\/dev\/zero <span class=\"nv\">of<\/span><span class=\"o\">=<\/span>\/dev\/sdz1\r\n<\/pre>\n<\/div>\n<p>\u3042\u307e\u308a\u30c6\u30b9\u30c8\u51fa\u6765\u3066\u3044\u306a\u3044\u306e\u3067\u4f55\u304b\u3042\u3063\u305f\u3089\u6559\u3048\u3066\u3082\u3089\u3048\u308b\u3068\u52a9\u304b\u308a\u307e\u3059\uff0e<\/p>\n<h1 id=\"_5\">\u304a\u308f\u308a<\/h1>\n<p>\u3068\u3044\u3046\u3053\u3068\u3067 Raspberry Pi \u3084 kobo \u306e SD Card \u306b\u4f55\u5ea6\u3082\u66f8\u304d\u8fbc\u3093\u3060\u6642\u306e Tips \u307e\u3068\u3081\u307f\u305f\u3044\u306a\u3082\u306e\u3067\u3057\u305f\uff0e\u3053\u3053\u9593\u9055\u3063\u3066\u308b\u3088\u3068\u304b\u3082\u3063\u3068\u3044\u3044\u65b9\u6cd5\u3042\u308b\u3088\u3068\u304b\u304a\u3057\u3048\u3066\u3082\u3089\u3048\u308b\u3068\u52a9\u304b\u308a\u307e\u3059\uff0e\uff08\u7279\u306b\u8aa4\u3063\u3066\u66f8\u304d\u8fbc\u307e\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u65b9\u6cd5\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u306f Raspberry Pi Advent Calendar 2015 \u306e12\u670808\u65e5\u5206\u3067\u3059\uff0e \u6628\u65e5\u306f @2box2bo\u3055\u3093\u306e RaspberryPi\u3068\u516c\u5f0f\u30bf\u30c3\u30c1\u30c7\u30a3\u30b9\u30d7\u30ec\u30a4\u3067\u30de\u30a4\u30f3\u30af\u30e9\u30d5\u30c8\u3059\u308b\u304a\u8a71 | \u6d41\u9023 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"webmentions_disabled_pings":false,"webmentions_disabled":false,"activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":4,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"","footnotes":""},"categories":[7,88,6,91,75],"tags":[276,32,275,92,44,290],"class_list":["post-1054","post","type-post","status-publish","format-standard","hentry","category-debian-linux","category-jessie-debian-linux","category-linux","category-raspberry-pi","category-stretch","tag-debian-linux","tag-jessie","tag-linux","tag-rasbian","tag-raspberrypi","tag-stretch"],"_links":{"self":[{"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/posts\/1054","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/comments?post=1054"}],"version-history":[{"count":0,"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/posts\/1054\/revisions"}],"wp:attachment":[{"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/media?parent=1054"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/categories?post=1054"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/matoken.org\/blog\/wp-json\/wp\/v2\/tags?post=1054"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}