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  Software RAID¸¦ boot disk·Î »ç¿ëÇÒ ¶§ failure recovery ¹æ¹ý
  Writer : Seyeon Weon     Date : 01-23     Hit : 13233    
  Æ®·¢¹é ÁÖ¼Ò : http://www.bioinformatics.pe.kr/gnuboard/bbs/tb.php/misc/7
(CentOS¿¡¼­ Å×½ºÆ® ÇØ º¸¾ÒÀ¸¸ç, Fedora ¹× ´Ù¸¥ Linux distributionµé¿¡¼­µµ À¯»çÇÒ °ÍÀÓ.)

Recommended setting

  • ¿ì¼±, boot partitionÀÇ °æ¿ì¿¡´Â raid1¸¸ ÀÛµ¿ÇÔ.
  • /boot´Â µû·Î ÀâÁö ¾ÊÀ¸¸ç, hard disk Àüü¸¦ / À¸·Î ÀâÀ» °Í.
  • swap partitionÀº ÀâÁö ¾Ê°í, swap fileÀ» / ¿¡ ¸¸µé °Í

swap file Àâ´Â ¹æ¹ý (5GBÀÇ °æ¿ì)


              # dd if=/dev/zero of=/swapfile bs=1024 count=5000000
              # mkswap /swapfile 5000000
              # sync
              # swapon /swapfile

              /etc/fstab¿¡
              /swapfile    swap    swap    defaults    0 0
              À» Ãß°¡ÇÔ.


µÎ¹øÂ° hard disk, Áï /dev/sdb¿¡ ÀÖ´ø hard disk°¡ ºÎÆÃ ½Ã BIOS¿¡ ÀÇÇØ¼­ ÀÚµ¿À¸·Î /dev/sda·Î ¿Å°ÜÁ³À» ¶§¿¡µµ ºÎÆÃÀÌ °¡´ÉÇϵµ·Ï ´ÙÀ½ ¸í·É ½ÇÇà

              anaconda¿¡¼­ À̰ÍÀ» ÇØÁÖÁö ¾ÊÀ¸¹Ç·Î OS ¼³Ä¡ ÈÄ¿¡ ¹Ýµå½Ã ½ÇÇà ÇØÁÖ¾î¾ß ÇÔ.
              µÎ¹øÂ° hard disk·Î »õ·Î ÀåÂøÇÑ disk¿¡µµ ¹Ýµå½Ã ½ÇÇàÀ» ÇØÁÖ¾î¾ß ÇÔ.

              # grub
              grub> device (hd0) /dev/sdb
              grub> root (hd0,0)
              grub> setup (hd0)

              ¸¸¾à ÀÌ¹Ì ºÎÆÃÀÌ ½ÃµµµÇ¾î GRUB ¿¡·¯°¡ ¶°ÀÖ´Â »óŶó¸é, ¸®´ª½º ¼³Ä¡ CD·Î "linux rescue" ¸ðµå·Î ÀçºÎÆÃ ÇÑ µÚ¿¡ ¾Æ·¡ ¸í·ÉÀ» ½ÇÇàÇÔ.
              À̶§´Â ÀÌ¹Ì /dev/sda·Î ÀÚµ¿ º¯°æÀÌ µÇ¾î ÀÖÀ¸¹Ç·Î, "device (hd0) /dev/sdb" lineÀÌ ÇÊ¿ä¾ø°Ô µÊ.

              # grub
              grub> root (hd0,0)
              grub> setup (hd0)


µÎ¹øÂ° disk, Áï /dev/sdb°¡ °íÀå³­ °æ¿ì
  1. °íÀå³­ hard disk¸¦ »©°í »õ hard disk¸¦ /dev/sdb¿¡ ÀåÂøÇÏ°í ´Ù½Ã ºÎÆÃÀ» ÇÔ.
  2. ¾Æ·¡¿¡ ¼³¸íÇÑ RAID rebuild¸¦ ¼öÇà.
  3. À§¿¡ ¼³¸íÇÑ GRUB ¼³Ä¡¸¦ »õ·Î ¼³Ä¡ÇÑ hard disk¿¡µµ ÇØÁÖ¾î¾ß ÇÔ.

ù¹øÂ° disk, Áï /dev/sda°¡ °íÀå³­ °æ¿ì

  1. ¿ø·¡ /dev/sdb¿¡ ÀÖ´ø hard disk, Áï °íÀ峪Áö ¾ÊÀº hard disk¸¦ /dev/sda·Î ¿Å±â°í, »õ hard disk¸¦ /dev/sdb¿¡ ÀåÂøÇÑ µÚ¿¡ ºÎÆÃ
  2. ¾Æ·¡¿¡ ¼³¸íÇÑ RAID rebuild¸¦ ¼öÇà.
  3. À§¿¡ ¼³¸íÇÑ GRUB ¼³Ä¡¸¦ »õ·Î ¼³Ä¡ÇÑ hard disk¿¡µµ ÇØÁÖ¾î¾ß ÇÔ.

RAID rebuild

»õ·Î hard disk¸¦ ÀåÂøÇÑ µÚ¿¡ raid1À» rebuild ÇÏ´Â ¹æ¹ýÀº ¾Æ·¡¿Í °°À½. (/dev/sdb°¡ »õ·Î ¼³Ä¡ÇÑ hard disk)
  1. ¿ì¼±, partition tableÀ» »õ hard disk·Î º¹»çÇÔ. (sda¿Í sdb¸¦ È¥µ¿ÇÏ´Â ½Ç¼ö¸¦ ÇÏÁö ¾Êµµ·Ï ÁÖÀÇ)
             #sfdisk -d /dev/sda > partitions.sda
             #sfdisk /dev/sdb < partitions.sda
  2. »õ hard disk¸¦ raid1¿¡ Ãß°¡ÇÔ.
        
    # mdadm --manage /dev/md0 --add /dev/sdb1
  3. ¸¸¾à ÁøÇà »óȲÀ» º¸°í ½Í´Ù¸é,
             # watch cat /proc/mdstat
    À» ½ÇÇàÇÔ.

³¡.



±×¹ÛÀÇ Á¤º¸µé

GRUB »èÁ¦
    # dd if=/dev/zero of=/dev/sdX bs=512 count=1
    Just remove MBR, without the partition table:
    # dd if=/dev/zero of=/dev/sdX bs=446 count=1

Manually rescan sata hard disk for hot plugin

    # echo "- - -" > /sys/class/scsi_host/hostX/scan

Manually creating raid device entries

   # mknod /dev/md0 b 9 0
   # mknod /dev/md1 b 9 1

Creating mdadm.conf

   # mdadm --detail --scan >> /etc/mdadm.conf


sataÀÇ hot plugin ±â´ÉÀ» »ç¿ëÇϸé ÄÄÇ»Å͸¦ shutdown ÇÏÁö ¾Ê°í hard disk ±³Ã¼°¡ °¡´ÉÇϳª ¿ÜºÎ¿¡¼­ Å»ÂøÀÌ °¡´ÉÇÑ ÇüŰ¡ ¾Æ´Ñ °æ¿ì¿¡´Â ¸Å¿ì À§ÇèÇÑ ÀÏÀÓ.