{
    "version": "https://jsonfeed.org/version/1.1",
    "user_comment": "This feed allows you to read the posts from this site in any feed reader that supports the JSON Feed format. To add this feed to your reader, copy the following URL -- https://matoken.org/blog/tag/rescue/feed/json/ -- and add it your reader.",
    "home_page_url": "https://matoken.org/blog/tag/rescue/",
    "feed_url": "https://matoken.org/blog/tag/rescue/feed/json/",
    "language": "ja",
    "title": "rescue – matoken's blog",
    "description": "Is there no plan B?",
    "icon": "https://matoken.org/blog/wp-content/uploads/2025/03/cropped-1865f695c4eecc844385acef2f078255036adccd42c254580ea3844543ab56d9.jpeg",
    "items": [
        {
            "id": "http://matoken.org/blog/?p=2718",
            "url": "https://matoken.org/blog/2020/04/11/notes-on-fat32-when-recovering-hdd-data/",
            "title": "HDD\u30c7\u30fc\u30bf\u5fa9\u65e7\u6642\u306bFAT32\u306e\u5236\u9650\u306b\u5d4c\u3063\u305f\u30e1\u30e2",
            "content_html": "<div class=\"paragraph\">\n<p>2.5\u30a4\u30f3\u30c1\u30cf\u30fc\u30c9\u30c7\u30a3\u30b9\u30af\u3092PC\u306b\u63a5\u7d9a\u3057\u3066\u3082\u8a8d\u8b58\u3057\u306a\u304f\u306a\u3063\u305f\u3068\u306e\u3053\u3068\u3067\u8aad\u3081\u308b\u3088\u3046\u306b\u306a\u3089\u306a\u3044\u304b\u76f8\u8ac7\u3092\u53d7\u3051\u307e\u3057\u305f\uff0e</p>\n</div>\n<div class=\"paragraph\">\n<p>\u5143\u3005NotePC\u306b\u5185\u8535\u3055\u308c\u3066\u3044\u305f\u3082\u306e\u3092USB\u63a5\u7d9a\u306e\u7bb1\u306b\u5165\u308c\u3066\u4f7f\u3063\u3066\u3044\u305f\u3068\u306e\u3053\u3068\uff0e<br />\n\u578b\u756a\u306f TOSHIBA MK4058GSX \u3067 \u7d04400GB \u306e\u3082\u306e\uff0e<br />\nUSB \u30a8\u30f3\u30af\u30ed\u30fc\u30b8\u30e3\u30fc\u306f USB3.0 \u63a5\u7d9a\u3067 USB A &#8211; micro B 3.0 \u4e45\u3005\u306b\u898b\u307e\u3057\u305f\uff0e</p>\n</div>\n<div class=\"paragraph\">\n<p>\u5fa9\u5143\u3057\u305f\u30c7\u30fc\u30bf\u306f\u4e00\u7dd2\u306b\u6e21\u3055\u308c\u305f 3.5\u30a4\u30f3\u30c1\u5916\u4ed8\u3051\u30cf\u30fc\u30c9\u30c7\u30a3\u30b9\u30af\u306b\u5165\u308c\u3066\u307b\u3057\u3044\u3068\u306e\u3053\u3068\uff0e<br />\n\u78ba\u8a8d\u3059\u308b\u3068FAT32\u3067\u3059\uff0e\u6a29\u9650\u306a\u3069\u306f\u843d\u3061\u3066\u3057\u307e\u3046\u3088\u306a\u30fc\u3068\u78ba\u8a8d\u3059\u308b\u3068\u30d5\u30a1\u30a4\u30eb\u304c\u6551\u3048\u3055\u3048\u3059\u308c\u3070\u3044\u3044\u3068\u306e\u3053\u3068\uff0e</p>\n</div>\n<div class=\"paragraph\">\n<p>\u307e\u3042\u30c7\u30a3\u30b9\u30af\u8a8d\u8b58\u304c\u51fa\u6765\u308c\u3070\u5438\u3044\u51fa\u3057\u3066loopback mount\u3057\u3066\u30b3\u30d4\u30fc\u3068\u8a00\u3046\u611f\u3058\u304b\u306a\u3068\u601d\u3063\u3066\u3044\u305f\u306e\u3067\u3059\u304cFAT32\u306e\u304a\u304b\u3052\u3067\u7d50\u69cb\u9762\u5012\u3067\u3057\u305f\uff0e</p>\n</div>\n<div class=\"paragraph\">\n<p>\u4eca\u56de\u306f Debian sid amd64 \u74b0\u5883\u3067HDD\u304b\u3089 GNU ddrescue \u3067\u30a4\u30e1\u30fc\u30b8\u3092\u5438\u3044\u51fa\u3057\u3066\u30de\u30a6\u30f3\u30c8\u3057\u3066\u304b\u3089\u30b3\u30d4\u30fc\u3059\u308b\u3053\u3068\u306b\u3057\u307e\u3057\u305f\uff0e</p>\n</div>\n<div class=\"paragraph\">\n<p>Linux\u74b0\u5883\u304c\u306a\u3051\u308c\u3070 SystemRescueCd \u3068\u304b\u3092USB\u30e1\u30e2\u30ea\u8d77\u52d5\u3057\u305f\u308a\u3059\u308b\u306e\u304c\u304a\u624b\u8efd\u3060\u3068\u601d\u3044\u307e\u3059\uff0e</p>\n</div>\n<div class=\"ulist\">\n<ul>\n<li><a href=\"http://www.system-rescue-cd.org/\">SystemRescueCd &#8211; System Rescue Cd Homepage</a></li>\n</ul>\n</div>\n<div class=\"paragraph\">\n<p>PC\u306b\u63a5\u7d9a\u3059\u308b\u3068\u30ad\u30e5\u30eb\u30ad\u30e5\u30eb\u30ab\u30c3\u30b3\u30f3\u3068\u3044\u3063\u305f\u7570\u97f3\u304c\u3057\u307e\u3059\uff0e\u4e45\u3005\u306b\u3053\u3046\u3044\u3046\u97f3\u3092\u3059\u308b\u30cf\u30fc\u30c9\u30c7\u30a3\u30b9\u30af\u3092\u89e6\u308a\u307e\u3057\u305f\uff0e</p>\n</div>\n<div class=\"paragraph\">\n<p>\u3053\u3053\u3067\u805e\u3051\u307e\u3059 <a href=\"https://files.matoken.org/index.php/s/87bax7MHnG28DfK\" class=\"bare\">https://files.matoken.org/index.php/s/87bax7MHnG28DfK</a></p>\n</div>\n<div class=\"paragraph\">\n<p>PC\u306b\u63a5\u7d9a\u3057\u3066\u5c11\u3057\u6642\u9593\u306f\u639b\u304b\u308a\u307e\u3057\u305f\u304c /dev/sdb \u3068\u3057\u3066\u8a8d\u8b58\u3057\u307e\u3057\u305f\uff0e</p>\n</div>\n<div class=\"paragraph\">\n<p>\u8a8d\u8b58\u3057\u305f\u3068\u3053\u308d\u3067 GNU ddrescue \u3067\u30c7\u30a3\u30b9\u30af\u30a4\u30e1\u30fc\u30b8\u3092\u5438\u3044\u51fa\u3057\u3066\u307f\u307e\u3059\uff0erate\u304c\u3059\u3054\u304f\u5909\u52d5\u3057\u3066\u6b8b\u308a\u6642\u9593\u304c\u6570\u6642\u9593\u301c\u6570\u5341\u65e5\u3067\u5b89\u5b9a\u3057\u307e\u305b\u3093\uff0e\u5e78\u30441\u65e5\u3068\u5c11\u3057\u3067\u6700\u5f8c\u307e\u3067\u8d70\u308a\u304d\u3063\u3066 bad-sector/bad area \u3082\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u306e\u3067\u6050\u3089\u304f\u30c7\u30fc\u30bf\u306e\u6b20\u843d\u3082\u306a\u304b\u3063\u305f\u3088\u3046\u3067\u3059\uff0e</p>\n</div>\n<div class=\"listingblock shell\">\n<div class=\"title\">ddrescue</div>\n<div class=\"content\">\n<pre class=\"highlight\"><code>$ time sudo ddrescue -n -v /dev/sdb ./disk.img ./disk.img.log\nGNU ddrescue 1.23\nAbout to copy 400088 MBytes from '/dev/sdb' to 'disk.img'\n    Starting positions: infile = 0 B,  outfile = 0 B\n    Copy block size: 128 sectors       Initial skip size: 7936 sectors\nSector size: 512 Bytes\n\nPress Ctrl-C to interrupt\n     ipos:  400088 MB, non-trimmed:        0 B,  current rate:  16015 kB/s\n     opos:  400088 MB, non-scraped:        0 B,  average rate:   4225 kB/s\nnon-tried:        0 B,  bad-sector:        0 B,    error rate:       0 B/s\n  rescued:  400088 MB,   bad areas:        0,        run time:  1d  2h 17m\npct rescued:  100.00%, read errors:        0,  remaining time:         n/a\n                              time since last successful read:         n/a\nFinished\n\nreal    1578m2.468s\nuser    0m35.744s\nsys     10m24.384s</code></pre>\n</div>\n</div>\n<div class=\"paragraph\">\n<p>\u5438\u3044\u51fa\u3057\u305f\u30c7\u30a3\u30b9\u30af\u30a4\u30e1\u30fc\u30b8\u306e\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u3092\u898b\u308b\u3068\u3053\u3093\u306a\u611f\u3058\u3067\u5143PC\u306e\u30ea\u30ab\u30d0\u30ea\u9818\u57df\u306a\u3069\u3082\u6b8b\u3063\u3066\u3044\u308b\u3088\u3046\u3067\u3059\uff0e</p>\n</div>\n<div class=\"listingblock shell\">\n<div class=\"title\">disk partition</div>\n<div class=\"content\">\n<pre class=\"highlight\"><code>$ fdisk -l ./disk.img\nDisk ./disk.img: 372.63 GiB, 400088457216 bytes, 781422768 sectors\nUnits: sectors of 1 * 512 = 512 bytes\nSector size (logical/physical): 512 bytes / 512 bytes\nI/O size (minimum/optimal): 512 bytes / 512 bytes\nDisklabel type: dos\nDisk identifier: 0xcd22cd22\n\nDevice      Boot     Start       End   Sectors   Size Id Type\n./disk.img1           2048   3074047   3072000   1.5G 27 Hidden NTFS WinRE\n./disk.img2 *      3074048 653834239 650760192 310.3G  7 HPFS/NTFS/exFAT\n./disk.img3      653834240 758691839 104857600    50G  f W95 Ext'd (LBA)\n./disk.img4      758691840 781422591  22730752  10.9G 17 Hidden HPFS/NTFS\n./disk.img5      653836288 758691839 104855552    50G  7 HPFS/NTFS/exFAT\n\nPartition table entries are not in disk order.</code></pre>\n</div>\n</div>\n<div class=\"paragraph\">\n<p>mount \u30b3\u30de\u30f3\u30c9\u306e offset option \u3067 mount \u3059\u308b\u3053\u3068\u3082\u51fa\u6765\u307e\u3059\u304c\u9762\u5012\u306a\u306e\u3067 kpartx \u30b3\u30de\u30f3\u30c9\u3067\u30c7\u30d0\u30a4\u30b9\u30de\u30c3\u30d4\u30f3\u30b0\u3092\u3057\u3066\u304a\u304d\u307e\u3059\uff0e<br />\n\u3053\u308c\u3067\u51fa\u6765\u305f\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u30c7\u30d0\u30a4\u30b9\u3092\u6307\u5b9a\u3057\u3066\u30de\u30a6\u30f3\u30c8\u3067\u304d\u307e\u3059\uff0e</p>\n</div>\n<div class=\"listingblock shell\">\n<div class=\"title\">\u30c7\u30d0\u30a4\u30b9\u30de\u30c3\u30d4\u30f3\u30b0</div>\n<div class=\"content\">\n<pre class=\"highlight\"><code>$ sudo kpartx -av ./disk.img\nadd map loop8p1 (253:3): 0 3072000 linear 7:8 2048\nadd map loop8p2 (253:4): 0 650760192 linear 7:8 3074048\nadd map loop8p3 (253:5): 0 2 linear 7:8 653834240\nadd map loop8p4 (253:6): 0 22730752 linear 7:8 758691840\nadd map loop8p5 (253:7): 0 104855552 linear 7:8 653836288</code></pre>\n</div>\n</div>\n<div class=\"listingblock shell\">\n<div class=\"title\">1\u3064\u76ee\u306e\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u3092\u8aad\u307f\u8fbc\u307f\u5c02\u7528\u3067 <code>/mnt/p1</code> \u306b\u30de\u30a6\u30f3\u30c8</div>\n<div class=\"content\">\n<pre class=\"highlight\"><code>$ sudo mkdir -p /mnt/p1\n$ sudo mount -o ro,loop /dev/mapper/loop8p1 /mnt/p1</code></pre>\n</div>\n</div>\n<div class=\"paragraph\">\n<p>rsync \u3092\u4f7f\u3063\u3066\u30b3\u30d4\u30fc\uff0e(<code>--modify-window=2</code> \u306fFAT32\u5bfe\u7b56)</p>\n</div>\n<div class=\"listingblock shell\">\n<div class=\"content\">\n<pre class=\"highlight\"><code>$ rsync -avvc --modify-window=2 --log-file=rsync.log \u30b3\u30d4\u30fc\u5143 \u30b3\u30d4\u30fc\u5148</code></pre>\n</div>\n</div>\n<div class=\"paragraph\">\n<p>\u6570\u6642\u9593\u5f8c\uff0e\u30ed\u30b0\u304c\u6b62\u307e\u3063\u3066\u308b\u3051\u3069\u5927\u304d\u3044\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001\u4e2d\u306a\u306e\u304b\u306a?<br />\n\u534a\u65e5\u5f8c\u2026\u2026\u672a\u3060\u7d42\u308f\u3089\u306a\u3044\uff0e\u30ed\u30b0\u5909\u308f\u3063\u3066\u306a\u3044\u3088\u3046\u306a?\u30e1\u30e2\u3057\u3066\u304a\u304f\uff0e<br />\n1\u65e5\u5f8c\uff0e\u753b\u9762\u306b\u5909\u5316\u304c\u306a\u3044\u306e\u3067\u56fa\u307e\u3063\u3066\u308b!</p>\n</div>\n<div class=\"paragraph\">\n<p>Ctrl+C\u3067\u4e2d\u65ad\uff0e<br />\n\u518d\u5ea6\u5b9f\u884c\u3059\u308b\u3068\u540c\u3058\u3068\u3053\u308d\u3067\u6b62\u307e\u308b\uff0e</p>\n</div>\n<div class=\"paragraph\">\n<p>\u306a\u3093\u3067\u3060\u308d\u3046?\u3068\u3044\u308d\u3044\u308d\u8a66\u3059\u3068\u8ee2\u9001\u5148\u306e\u8a72\u5f53\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u30a8\u30e9\u30fc\u3068\u306a\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3057\u305f\uff0e</p>\n</div>\n<div class=\"paragraph\">\n<p>FAT32\u306e\u554f\u984c\u30671\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u5185\u306e\u30d5\u30a1\u30a4\u30eb\u6570\u5236\u9650\u306b\u5f15\u3063\u304b\u304b\u3063\u305f\u3088\u3046\uff0e</p>\n</div>\n<div class=\"listingblock shell\">\n<div class=\"title\">\u77ed\u3044\u30d5\u30a1\u30a4\u30eb\u540d\u9577\u3067\u6ca2\u5c71\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u308b\u306865535\u500b\u307e\u3067</div>\n<div class=\"content\">\n<pre class=\"highlight\"><code>$ n=1;while :;do if ! touch ${n};then echo ${n} ;break;fi ;n=$(( n + 1 ));done\ntouch: cannot touch '65534': No space left on device\n65534\n$ ls -1A|wc -l\n65533\n$ ls -1a|wc -l\n65535</code></pre>\n</div>\n</div>\n<div class=\"listingblock shell\">\n<div class=\"title\">255\u6587\u5b57\u306e\u30d5\u30a1\u30a4\u30eb\u540d\u9577\u3060\u30683123\u500b\u307e\u3067</div>\n<div class=\"content\">\n<pre class=\"highlight\"><code>$ n=1;while :;do if ! touch `printf %0255d ${n}`;then echo ${n} ;break;fi ;n=$(( n + 1 ));done\ntouch: cannot touch '000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003121': No space left on device\n3121\n$ ls -lA|wc -l\n3121\n$ ls -la|wc -l\n3123</code></pre>\n</div>\n</div>\n<div class=\"paragraph\">\n<p><code>--exclude '\u9664\u5916'</code> \u3067\u3068\u308a\u3042\u3048\u305a\u3042\u3068\u3067\u5bfe\u5fdc\uff0e\u3068 <code>--timeout=30</code> \u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4ed8\u3051\u3066\u30a8\u30e9\u30fc\u6642\u306b\u7d42\u4e86\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u518d\u5ea6\u5b9f\u884c\uff0e</p>\n</div>\n<div class=\"listingblock shell\">\n<div class=\"content\">\n<pre class=\"highlight\"><code>$ rsync -avvc --modify-window=2 --timeout=30 --log-file=rsync.log --exclude '\u9664\u5916' \u30b3\u30d4\u30fc\u5143 \u30b3\u30d4\u30fc\u5148</code></pre>\n</div>\n</div>\n<div class=\"paragraph\">\n<p>\u4f55\u5ea6\u304b\u540c\u3058\u30a8\u30e9\u30fc\u304c\u3067\u305f\u306e\u3067\u90fd\u5ea6\u9664\u5916\u30ea\u30b9\u30c8\u3092\u4f38\u3070\u3057\u3066\u3044\u304f&gt;&lt;</p>\n</div>\n<div class=\"paragraph\">\n<p>\u7d42\u308f\u3063\u305f\u5f8c\u306b\u8a72\u5f53\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306fzip\u30a2\u30fc\u30ab\u30a4\u30d6\u5316\u3057\u305f\uff0e4GB\u3092\u8d85\u3048\u308b\u3082\u306e\u306b\u3064\u3044\u3066\u306fzip\u306eSplit archives\u6a5f\u80fd(zip 3.0\u4ee5\u4e0a)\u3092\u5229\u7528\uff0e</p>\n</div>\n<div class=\"listingblock shell\">\n<div class=\"content\">\n<pre class=\"highlight\"><code>$ zip -9rs 3800m /fat32/hoge.zip source_dir</code></pre>\n</div>\n</div>\n<div class=\"paragraph\">\n<p>\u540c\u69d8\u306b\u30d1\u30fc\u30c6\u30a3\u30fc\u30b7\u30e7\u30f32\u3064\u76ee\u4ee5\u964d\u3082\u30b3\u30d4\u30fc\u3057\u3066\u3044\u304f\uff0e</p>\n</div>\n<div class=\"paragraph\">\n<p>\u66f8\u304d\u51fa\u3057HDD\u306e\u7a7a\u304d\u5bb9\u91cf\u306b\u4f59\u88d5\u304c\u3042\u3063\u305f\u306e\u3067\u5438\u3044\u51fa\u3057\u305fRAW Disk \u30a4\u30e1\u30fc\u30b8\u3082\u30b3\u30d4\u30fc\u3057\u3066\u304a\u304f\uff0e<br />\n4GB\u5236\u9650\u304c\u3042\u308b\u306e\u3067split\u3067\u5206\u5272\u3057\u3066\u30b3\u30d4\u30fc\uff0e</p>\n</div>\n<div class=\"listingblock shell\">\n<div class=\"content\">\n<pre class=\"highlight\"><code>$ split -b 4000000000 ./disk.img</code></pre>\n</div>\n</div>\n<div class=\"paragraph\">\n<p>\u3053\u308c\u3067\u3068\u308a\u3042\u3048\u305a\u7c21\u5358\u306a\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3068\u4e00\u7dd2\u306b\u6e21\u3057\u3066\u7d42\u308f\u308a\u306b\u3057\u307e\u3057\u305f\uff0e<br />\n\u305d\u306e\u5f8c\u8fd4\u4fe1\u306a\u3044\u3051\u3069\u8fd4\u4fe1\u304c\u306a\u3044\u3063\u3066\u3053\u3068\u306f\u591a\u5206\u5927\u4e08\u592b\u306a\u306e\u304b\u306a?</p>\n</div>\n<div class=\"paragraph\">\n<p>\u3066\u3053\u3068\u3067\u30c7\u30a3\u30b9\u30af\u306fFAT32 \u306f\u907f\u3051\u305f\u307b\u3046\u304c\u3044\u3044\u306d\u3068\u3044\u3046\uff0e\u30c7\u30b8\u30ab\u30e1\u306a\u3069\u3067FAT32\u306b\u3057\u304b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u3082\u306e\u306f\u4ed5\u65b9\u304c\u306a\u3044\u3067\u3059\u304c\uff0cPC\u306b\u7e4b\u3050\u5916\u4ed8\u3051HDD\u306a\u3069\u306fNTFS\u3084exFat\u306a\u3069\u306b\u3057\u305f\u3089\u4eca\u56de\u306e\u3088\u3046\u306a\u30c8\u30e9\u30d6\u30eb\u306b\u4f1a\u3044\u306b\u304f\u3044\u3068\u601d\u3044\u307e\u3059\uff0e(Linux\u3067\u3082\u8aad\u307f\u66f8\u304d\u3067\u304d\u308b)</p>\n</div>\n",
            "content_text": "2.5\u30a4\u30f3\u30c1\u30cf\u30fc\u30c9\u30c7\u30a3\u30b9\u30af\u3092PC\u306b\u63a5\u7d9a\u3057\u3066\u3082\u8a8d\u8b58\u3057\u306a\u304f\u306a\u3063\u305f\u3068\u306e\u3053\u3068\u3067\u8aad\u3081\u308b\u3088\u3046\u306b\u306a\u3089\u306a\u3044\u304b\u76f8\u8ac7\u3092\u53d7\u3051\u307e\u3057\u305f\uff0e\n\n\n\u5143\u3005NotePC\u306b\u5185\u8535\u3055\u308c\u3066\u3044\u305f\u3082\u306e\u3092USB\u63a5\u7d9a\u306e\u7bb1\u306b\u5165\u308c\u3066\u4f7f\u3063\u3066\u3044\u305f\u3068\u306e\u3053\u3068\uff0e\n\u578b\u756a\u306f TOSHIBA MK4058GSX \u3067 \u7d04400GB \u306e\u3082\u306e\uff0e\nUSB \u30a8\u30f3\u30af\u30ed\u30fc\u30b8\u30e3\u30fc\u306f USB3.0 \u63a5\u7d9a\u3067 USB A &#8211; micro B 3.0 \u4e45\u3005\u306b\u898b\u307e\u3057\u305f\uff0e\n\n\n\u5fa9\u5143\u3057\u305f\u30c7\u30fc\u30bf\u306f\u4e00\u7dd2\u306b\u6e21\u3055\u308c\u305f 3.5\u30a4\u30f3\u30c1\u5916\u4ed8\u3051\u30cf\u30fc\u30c9\u30c7\u30a3\u30b9\u30af\u306b\u5165\u308c\u3066\u307b\u3057\u3044\u3068\u306e\u3053\u3068\uff0e\n\u78ba\u8a8d\u3059\u308b\u3068FAT32\u3067\u3059\uff0e\u6a29\u9650\u306a\u3069\u306f\u843d\u3061\u3066\u3057\u307e\u3046\u3088\u306a\u30fc\u3068\u78ba\u8a8d\u3059\u308b\u3068\u30d5\u30a1\u30a4\u30eb\u304c\u6551\u3048\u3055\u3048\u3059\u308c\u3070\u3044\u3044\u3068\u306e\u3053\u3068\uff0e\n\n\n\u307e\u3042\u30c7\u30a3\u30b9\u30af\u8a8d\u8b58\u304c\u51fa\u6765\u308c\u3070\u5438\u3044\u51fa\u3057\u3066loopback mount\u3057\u3066\u30b3\u30d4\u30fc\u3068\u8a00\u3046\u611f\u3058\u304b\u306a\u3068\u601d\u3063\u3066\u3044\u305f\u306e\u3067\u3059\u304cFAT32\u306e\u304a\u304b\u3052\u3067\u7d50\u69cb\u9762\u5012\u3067\u3057\u305f\uff0e\n\n\n\u4eca\u56de\u306f Debian sid amd64 \u74b0\u5883\u3067HDD\u304b\u3089 GNU ddrescue \u3067\u30a4\u30e1\u30fc\u30b8\u3092\u5438\u3044\u51fa\u3057\u3066\u30de\u30a6\u30f3\u30c8\u3057\u3066\u304b\u3089\u30b3\u30d4\u30fc\u3059\u308b\u3053\u3068\u306b\u3057\u307e\u3057\u305f\uff0e\n\n\nLinux\u74b0\u5883\u304c\u306a\u3051\u308c\u3070 SystemRescueCd \u3068\u304b\u3092USB\u30e1\u30e2\u30ea\u8d77\u52d5\u3057\u305f\u308a\u3059\u308b\u306e\u304c\u304a\u624b\u8efd\u3060\u3068\u601d\u3044\u307e\u3059\uff0e\n\n\n\nSystemRescueCd &#8211; System Rescue Cd Homepage\n\n\n\nPC\u306b\u63a5\u7d9a\u3059\u308b\u3068\u30ad\u30e5\u30eb\u30ad\u30e5\u30eb\u30ab\u30c3\u30b3\u30f3\u3068\u3044\u3063\u305f\u7570\u97f3\u304c\u3057\u307e\u3059\uff0e\u4e45\u3005\u306b\u3053\u3046\u3044\u3046\u97f3\u3092\u3059\u308b\u30cf\u30fc\u30c9\u30c7\u30a3\u30b9\u30af\u3092\u89e6\u308a\u307e\u3057\u305f\uff0e\n\n\n\u3053\u3053\u3067\u805e\u3051\u307e\u3059 https://files.matoken.org/index.php/s/87bax7MHnG28DfK\n\n\nPC\u306b\u63a5\u7d9a\u3057\u3066\u5c11\u3057\u6642\u9593\u306f\u639b\u304b\u308a\u307e\u3057\u305f\u304c /dev/sdb \u3068\u3057\u3066\u8a8d\u8b58\u3057\u307e\u3057\u305f\uff0e\n\n\n\u8a8d\u8b58\u3057\u305f\u3068\u3053\u308d\u3067 GNU ddrescue \u3067\u30c7\u30a3\u30b9\u30af\u30a4\u30e1\u30fc\u30b8\u3092\u5438\u3044\u51fa\u3057\u3066\u307f\u307e\u3059\uff0erate\u304c\u3059\u3054\u304f\u5909\u52d5\u3057\u3066\u6b8b\u308a\u6642\u9593\u304c\u6570\u6642\u9593\u301c\u6570\u5341\u65e5\u3067\u5b89\u5b9a\u3057\u307e\u305b\u3093\uff0e\u5e78\u30441\u65e5\u3068\u5c11\u3057\u3067\u6700\u5f8c\u307e\u3067\u8d70\u308a\u304d\u3063\u3066 bad-sector/bad area \u3082\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u306e\u3067\u6050\u3089\u304f\u30c7\u30fc\u30bf\u306e\u6b20\u843d\u3082\u306a\u304b\u3063\u305f\u3088\u3046\u3067\u3059\uff0e\n\n\nddrescue\n\n$ time sudo ddrescue -n -v /dev/sdb ./disk.img ./disk.img.log\nGNU ddrescue 1.23\nAbout to copy 400088 MBytes from '/dev/sdb' to 'disk.img'\n    Starting positions: infile = 0 B,  outfile = 0 B\n    Copy block size: 128 sectors       Initial skip size: 7936 sectors\nSector size: 512 Bytes\n\nPress Ctrl-C to interrupt\n     ipos:  400088 MB, non-trimmed:        0 B,  current rate:  16015 kB/s\n     opos:  400088 MB, non-scraped:        0 B,  average rate:   4225 kB/s\nnon-tried:        0 B,  bad-sector:        0 B,    error rate:       0 B/s\n  rescued:  400088 MB,   bad areas:        0,        run time:  1d  2h 17m\npct rescued:  100.00%, read errors:        0,  remaining time:         n/a\n                              time since last successful read:         n/a\nFinished\n\nreal    1578m2.468s\nuser    0m35.744s\nsys     10m24.384s\n\n\n\n\u5438\u3044\u51fa\u3057\u305f\u30c7\u30a3\u30b9\u30af\u30a4\u30e1\u30fc\u30b8\u306e\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u3092\u898b\u308b\u3068\u3053\u3093\u306a\u611f\u3058\u3067\u5143PC\u306e\u30ea\u30ab\u30d0\u30ea\u9818\u57df\u306a\u3069\u3082\u6b8b\u3063\u3066\u3044\u308b\u3088\u3046\u3067\u3059\uff0e\n\n\ndisk partition\n\n$ fdisk -l ./disk.img\nDisk ./disk.img: 372.63 GiB, 400088457216 bytes, 781422768 sectors\nUnits: sectors of 1 * 512 = 512 bytes\nSector size (logical/physical): 512 bytes / 512 bytes\nI/O size (minimum/optimal): 512 bytes / 512 bytes\nDisklabel type: dos\nDisk identifier: 0xcd22cd22\n\nDevice      Boot     Start       End   Sectors   Size Id Type\n./disk.img1           2048   3074047   3072000   1.5G 27 Hidden NTFS WinRE\n./disk.img2 *      3074048 653834239 650760192 310.3G  7 HPFS/NTFS/exFAT\n./disk.img3      653834240 758691839 104857600    50G  f W95 Ext'd (LBA)\n./disk.img4      758691840 781422591  22730752  10.9G 17 Hidden HPFS/NTFS\n./disk.img5      653836288 758691839 104855552    50G  7 HPFS/NTFS/exFAT\n\nPartition table entries are not in disk order.\n\n\n\nmount \u30b3\u30de\u30f3\u30c9\u306e offset option \u3067 mount \u3059\u308b\u3053\u3068\u3082\u51fa\u6765\u307e\u3059\u304c\u9762\u5012\u306a\u306e\u3067 kpartx \u30b3\u30de\u30f3\u30c9\u3067\u30c7\u30d0\u30a4\u30b9\u30de\u30c3\u30d4\u30f3\u30b0\u3092\u3057\u3066\u304a\u304d\u307e\u3059\uff0e\n\u3053\u308c\u3067\u51fa\u6765\u305f\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u30c7\u30d0\u30a4\u30b9\u3092\u6307\u5b9a\u3057\u3066\u30de\u30a6\u30f3\u30c8\u3067\u304d\u307e\u3059\uff0e\n\n\n\u30c7\u30d0\u30a4\u30b9\u30de\u30c3\u30d4\u30f3\u30b0\n\n$ sudo kpartx -av ./disk.img\nadd map loop8p1 (253:3): 0 3072000 linear 7:8 2048\nadd map loop8p2 (253:4): 0 650760192 linear 7:8 3074048\nadd map loop8p3 (253:5): 0 2 linear 7:8 653834240\nadd map loop8p4 (253:6): 0 22730752 linear 7:8 758691840\nadd map loop8p5 (253:7): 0 104855552 linear 7:8 653836288\n\n\n\n1\u3064\u76ee\u306e\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u3092\u8aad\u307f\u8fbc\u307f\u5c02\u7528\u3067 /mnt/p1 \u306b\u30de\u30a6\u30f3\u30c8\n\n$ sudo mkdir -p /mnt/p1\n$ sudo mount -o ro,loop /dev/mapper/loop8p1 /mnt/p1\n\n\n\nrsync \u3092\u4f7f\u3063\u3066\u30b3\u30d4\u30fc\uff0e(--modify-window=2 \u306fFAT32\u5bfe\u7b56)\n\n\n\n$ rsync -avvc --modify-window=2 --log-file=rsync.log \u30b3\u30d4\u30fc\u5143 \u30b3\u30d4\u30fc\u5148\n\n\n\n\u6570\u6642\u9593\u5f8c\uff0e\u30ed\u30b0\u304c\u6b62\u307e\u3063\u3066\u308b\u3051\u3069\u5927\u304d\u3044\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001\u4e2d\u306a\u306e\u304b\u306a?\n\u534a\u65e5\u5f8c\u2026\u2026\u672a\u3060\u7d42\u308f\u3089\u306a\u3044\uff0e\u30ed\u30b0\u5909\u308f\u3063\u3066\u306a\u3044\u3088\u3046\u306a?\u30e1\u30e2\u3057\u3066\u304a\u304f\uff0e\n1\u65e5\u5f8c\uff0e\u753b\u9762\u306b\u5909\u5316\u304c\u306a\u3044\u306e\u3067\u56fa\u307e\u3063\u3066\u308b!\n\n\nCtrl+C\u3067\u4e2d\u65ad\uff0e\n\u518d\u5ea6\u5b9f\u884c\u3059\u308b\u3068\u540c\u3058\u3068\u3053\u308d\u3067\u6b62\u307e\u308b\uff0e\n\n\n\u306a\u3093\u3067\u3060\u308d\u3046?\u3068\u3044\u308d\u3044\u308d\u8a66\u3059\u3068\u8ee2\u9001\u5148\u306e\u8a72\u5f53\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u30a8\u30e9\u30fc\u3068\u306a\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3057\u305f\uff0e\n\n\nFAT32\u306e\u554f\u984c\u30671\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u5185\u306e\u30d5\u30a1\u30a4\u30eb\u6570\u5236\u9650\u306b\u5f15\u3063\u304b\u304b\u3063\u305f\u3088\u3046\uff0e\n\n\n\u77ed\u3044\u30d5\u30a1\u30a4\u30eb\u540d\u9577\u3067\u6ca2\u5c71\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u308b\u306865535\u500b\u307e\u3067\n\n$ n=1;while :;do if ! touch ${n};then echo ${n} ;break;fi ;n=$(( n + 1 ));done\ntouch: cannot touch '65534': No space left on device\n65534\n$ ls -1A|wc -l\n65533\n$ ls -1a|wc -l\n65535\n\n\n\n255\u6587\u5b57\u306e\u30d5\u30a1\u30a4\u30eb\u540d\u9577\u3060\u30683123\u500b\u307e\u3067\n\n$ n=1;while :;do if ! touch `printf %0255d ${n}`;then echo ${n} ;break;fi ;n=$(( n + 1 ));done\ntouch: cannot touch '000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003121': No space left on device\n3121\n$ ls -lA|wc -l\n3121\n$ ls -la|wc -l\n3123\n\n\n\n--exclude '\u9664\u5916' \u3067\u3068\u308a\u3042\u3048\u305a\u3042\u3068\u3067\u5bfe\u5fdc\uff0e\u3068 --timeout=30 \u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4ed8\u3051\u3066\u30a8\u30e9\u30fc\u6642\u306b\u7d42\u4e86\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u518d\u5ea6\u5b9f\u884c\uff0e\n\n\n\n$ rsync -avvc --modify-window=2 --timeout=30 --log-file=rsync.log --exclude '\u9664\u5916' \u30b3\u30d4\u30fc\u5143 \u30b3\u30d4\u30fc\u5148\n\n\n\n\u4f55\u5ea6\u304b\u540c\u3058\u30a8\u30e9\u30fc\u304c\u3067\u305f\u306e\u3067\u90fd\u5ea6\u9664\u5916\u30ea\u30b9\u30c8\u3092\u4f38\u3070\u3057\u3066\u3044\u304f&gt;&lt;\n\n\n\u7d42\u308f\u3063\u305f\u5f8c\u306b\u8a72\u5f53\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306fzip\u30a2\u30fc\u30ab\u30a4\u30d6\u5316\u3057\u305f\uff0e4GB\u3092\u8d85\u3048\u308b\u3082\u306e\u306b\u3064\u3044\u3066\u306fzip\u306eSplit archives\u6a5f\u80fd(zip 3.0\u4ee5\u4e0a)\u3092\u5229\u7528\uff0e\n\n\n\n$ zip -9rs 3800m /fat32/hoge.zip source_dir\n\n\n\n\u540c\u69d8\u306b\u30d1\u30fc\u30c6\u30a3\u30fc\u30b7\u30e7\u30f32\u3064\u76ee\u4ee5\u964d\u3082\u30b3\u30d4\u30fc\u3057\u3066\u3044\u304f\uff0e\n\n\n\u66f8\u304d\u51fa\u3057HDD\u306e\u7a7a\u304d\u5bb9\u91cf\u306b\u4f59\u88d5\u304c\u3042\u3063\u305f\u306e\u3067\u5438\u3044\u51fa\u3057\u305fRAW Disk \u30a4\u30e1\u30fc\u30b8\u3082\u30b3\u30d4\u30fc\u3057\u3066\u304a\u304f\uff0e\n4GB\u5236\u9650\u304c\u3042\u308b\u306e\u3067split\u3067\u5206\u5272\u3057\u3066\u30b3\u30d4\u30fc\uff0e\n\n\n\n$ split -b 4000000000 ./disk.img\n\n\n\n\u3053\u308c\u3067\u3068\u308a\u3042\u3048\u305a\u7c21\u5358\u306a\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3068\u4e00\u7dd2\u306b\u6e21\u3057\u3066\u7d42\u308f\u308a\u306b\u3057\u307e\u3057\u305f\uff0e\n\u305d\u306e\u5f8c\u8fd4\u4fe1\u306a\u3044\u3051\u3069\u8fd4\u4fe1\u304c\u306a\u3044\u3063\u3066\u3053\u3068\u306f\u591a\u5206\u5927\u4e08\u592b\u306a\u306e\u304b\u306a?\n\n\n\u3066\u3053\u3068\u3067\u30c7\u30a3\u30b9\u30af\u306fFAT32 \u306f\u907f\u3051\u305f\u307b\u3046\u304c\u3044\u3044\u306d\u3068\u3044\u3046\uff0e\u30c7\u30b8\u30ab\u30e1\u306a\u3069\u3067FAT32\u306b\u3057\u304b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u3082\u306e\u306f\u4ed5\u65b9\u304c\u306a\u3044\u3067\u3059\u304c\uff0cPC\u306b\u7e4b\u3050\u5916\u4ed8\u3051HDD\u306a\u3069\u306fNTFS\u3084exFat\u306a\u3069\u306b\u3057\u305f\u3089\u4eca\u56de\u306e\u3088\u3046\u306a\u30c8\u30e9\u30d6\u30eb\u306b\u4f1a\u3044\u306b\u304f\u3044\u3068\u601d\u3044\u307e\u3059\uff0e(Linux\u3067\u3082\u8aad\u307f\u66f8\u304d\u3067\u304d\u308b)",
            "date_published": "2020-04-11T08:27:56+09:00",
            "date_modified": "2020-04-11T04:33:31+09:00",
            "authors": [
                {
                    "name": "matoken",
                    "url": "https://matoken.org/blog/author/matoken/",
                    "avatar": "https://secure.gravatar.com/avatar/38f5f3b575c5eb45cda6aa659bca119ac7a5e16b46565e869d0030e3bd66981d?s=512&d=mm&r=g"
                }
            ],
            "author": {
                "name": "matoken",
                "url": "https://matoken.org/blog/author/matoken/",
                "avatar": "https://secure.gravatar.com/avatar/38f5f3b575c5eb45cda6aa659bca119ac7a5e16b46565e869d0030e3bd66981d?s=512&d=mm&r=g"
            },
            "tags": [
                "fat32",
                "hdd",
                "rescue",
                "Debian",
                "Linux",
                "sid"
            ]
        }
    ]
}