blog/tags/raid/index.html

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   6     <title>Petter Reinholdtsen: Entries Tagged raid</title>
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  13  <h1>
  14      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  15
  16  </h1>
  17
  18 </div>
  19
  20
  21     <h3>Entries tagged "raid".</h3>
  22
  23     <div class="entry">
  24       <div class="title">
  25         <a href="http://people.skolelinux.org/pere/blog/How_to_figure_out_which_RAID_disk_to_replace_when_it_fail.html">How to figure out which RAID disk to replace when it fail</a>
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  27       <div class="date">
  28         14th February 2012
  29       </div>
  30       <div class="body">
  31         <p>Once in a while my home server have disk problems.  Thanks to Linux
  32 Software RAID, I have not lost data yet (but
  33 <a href="http://comments.gmane.org/gmane.linux.raid/34532">I was
  34 close</a> this summer :).  But once a disk is starting to behave
  35 funny, a practical problem present itself.  How to get from the Linux
  36 device name (like /dev/sdd) to something that can be used to identify
  37 the disk when the computer is turned off?  In my case I have SATA
  38 disks with a unique ID printed on the label.  All I need is a way to
  39 figure out how to query the disk to get the ID out.</p>
  40
  41 <p>After fumbling a bit, I
  42 <a href="http://www.cyberciti.biz/faq/linux-getting-scsi-ide-harddisk-information/">found
  43 that hdparm -I</a> will report the disk serial number, which is
  44 printed on the disk label.  The following (almost) one-liner can be
  45 used to look up the ID of all the failed disks:</p>
  46
  47 <blockquote><pre>
  48 for d in $(cat /proc/mdstat |grep '(F)'|tr ' ' "\n"|grep '(F)'|cut -d\[ -f1|sort -u);
  49 do
  50     printf "Failed disk $d: "
  51     hdparm -I /dev/$d |grep 'Serial Num'
  52 done
  53 </blockquote></pre>
  54
  55 <p>Putting it here to make sure I do not have to search for it the
  56 next time, and in case other find it useful.</p>
  57
  58 <p>At the moment I have two failing disk. :(</p>
  59
  60 <blockquote><pre>
  61 Failed disk sdd1:       Serial Number:      WD-WCASJ1860823
  62 Failed disk sdd2:       Serial Number:      WD-WCASJ1860823
  63 Failed disk sde2:       Serial Number:      WD-WCASJ1840589
  64 </blockquote></pre>
  65
  66 <p>The last time I had failing disks, I added the serial number on
  67 labels I printed and stuck on the short sides of each disk, to be able
  68 to figure out which disk to take out of the box without having to
  69 remove each disk to look at the physical vendor label.  The vendor
  70 label is at the top of the disk, which is hidden when the disks are
  71 mounted inside my box.</p>
  72
  73 <p>I really wish the check_linux_raid Nagios plugin for checking Linux
  74 Software RAID in the
  75 <a href="http://packages.qa.debian.org/n/nagios-plugins.html">nagios-plugins-standard</a>
  76 debian package would look up this value automatically, as it would
  77 make the plugin a lot more useful when my disks fail.  At the moment
  78 it only report a failure when there are no more spares left (it really
  79 should warn as soon as a disk is failing), and it do not tell me which
  80 disk(s) is failing when the RAID is running short on disks.</p>
  81
  82       </div>
  83       <div class="tags">
  84
  85
  86         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/raid">raid</a>.
  87
  88
  89       </div>
  90     </div>
  91     <div class="padding"></div>
  92
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  95
  96
  97
  98 <h2>Archive</h2>
  99 <ul>
 100
 101 <li>2012
 102 <ul>
 103
 104 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 105
 106 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 107
 108 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 109
 110 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 111
 112 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 113
 114 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 115
 116 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 117
 118 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (1)</a></li>
 119
 120 </ul></li>
 121
 122 <li>2011
 123 <ul>
 124
 125 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 126
 127 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 128
 129 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 130
 131 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 132
 133 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 134
 135 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 136
 137 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 138
 139 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 140
 141 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 142
 143 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 144
 145 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 146
 147 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 148
 149 </ul></li>
 150
 151 <li>2010
 152 <ul>
 153
 154 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 155
 156 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 157
 158 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 159
 160 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 161
 162 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 163
 164 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 165
 166 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 167
 168 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 169
 170 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 171
 172 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 173
 174 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 175
 176 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 177
 178 </ul></li>
 179
 180 <li>2009
 181 <ul>
 182
 183 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 184
 185 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 186
 187 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 188
 189 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 190
 191 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 192
 193 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 194
 195 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 196
 197 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 198
 199 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 200
 201 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 202
 203 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 204
 205 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 206
 207 </ul></li>
 208
 209 <li>2008
 210 <ul>
 211
 212 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 213
 214 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 215
 216 </ul></li>
 217
 218 </ul>
 219
 220
 221
 222 <h2>Tags</h2>
 223 <ul>
 224
 225  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (13)</a></li>
 226
 227  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 228
 229  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 230
 231  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (2)</a></li>
 232
 233  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (12)</a></li>
 234
 235  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 236
 237  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (55)</a></li>
 238
 239  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (110)</a></li>
 240
 241  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (9)</a></li>
 242
 243  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 244
 245  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (145)</a></li>
 246
 247  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (17)</a></li>
 248
 249  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
 250
 251  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (6)</a></li>
 252
 253  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (30)</a></li>
 254
 255  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (16)</a></li>
 256
 257  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (8)</a></li>
 258
 259  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (4)</a></li>
 260
 261  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 262
 263  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (22)</a></li>
 264
 265  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (190)</a></li>
 266
 267  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (142)</a></li>
 268
 269  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (4)</a></li>
 270
 271  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 272
 273  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (34)</a></li>
 274
 275  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (48)</a></li>
 276
 277  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (1)</a></li>
 278
 279  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 280
 281  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (2)</a></li>
 282
 283  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (4)</a></li>
 284
 285  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 286
 287  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (4)</a></li>
 288
 289  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 290
 291  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (23)</a></li>
 292
 293  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 294
 295  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (1)</a></li>
 296
 297  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (36)</a></li>
 298
 299  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (1)</a></li>
 300
 301  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (4)</a></li>
 302
 303  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (10)</a></li>
 304
 305  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (6)</a></li>
 306
 307  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (32)</a></li>
 308
 309  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (1)</a></li>
 310
 311  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (25)</a></li>
 312
 313 </ul>
 314
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