{"id":8155,"date":"2024-06-01T22:30:34","date_gmt":"2024-06-01T13:30:34","guid":{"rendered":"https:\/\/hasu0707.duckdns.org\/blog\/?p=8155"},"modified":"2024-06-01T22:34:44","modified_gmt":"2024-06-01T13:34:44","slug":"software-raid-%ea%b5%ac%ec%84%b1-mdadm","status":"publish","type":"post","link":"https:\/\/hasu0707.duckdns.org\/blog\/?p=8155","title":{"rendered":"Software RAID \uad6c\uc131 (mdadm)"},"content":{"rendered":"\n\u25a0 RAID-0 \ub300\uc0c1 \ub514\uc2a4\ud06c (RAID Level: https:\/\/namu.wiki\/w\/RAID<\/a>)<\/strong>
\/dev\/sdb 500GB
\/dev\/sdc 500GB

1.mdadm \uc124\uce58<\/strong>
  yum -y install mdadm
  apt -y install mdadm<\/em>

2.\ub300\uc0c1 \ub514\uc2a4\ud06c \ud30c\ud2f0\uc158 \uc0ad\uc81c<\/strong>
  dd if=\/dev\/zero of=\/dev\/sdb bs=1024 count=1<\/em>
  dd if=\/dev\/zero of=\/dev\/sdc bs=1024 count=1<\/em>

3.RAID \ud0c0\uc785\uc73c\ub85c \ud30c\ud2f0\uc154\ub2dd<\/strong>
  # fdisk \/dev\/sdb<\/em> (\uac19\uc740 \ubc29\ubc95\uc73c\ub85c sdc\ub3c4 \ud30c\ud2f0\uc154\ub2dd)

    Welcome to fdisk (util-linux 2.32.1).<\/span>
    Changes will remain in memory only, until you decide to write them.<\/span>
    Be careful before using the write command.<\/span>

    Device does not contain a recognized partition table.<\/span>
    Created a new DOS disklabel with disk identifier 0x5e7f68d2.<\/span>

    Command (m for help): n<\/span><\/span>
    Partition type<\/span>
       p   primary (0 primary, 0 extended, 4 free)<\/span>
       e   extended (container for logical partitions)<\/span>
    Select (default p): p<\/span><\/span>
    Partition number (1-4, default 1):<\/span>
    First sector (2048-976773167, default 2048):<\/span>
    Last sector, +sectors or +size{K,M,G,T,P} (2048-976773167, default 976773167):<\/span>

    Created a new partition 1 of type 'Linux' and of size 465.8 GiB.<\/span>
    Partition #1 contains a ext4 signature.<\/span>

    Do you want to remove the signature? [Y]es\/[N]o: Y<\/span><\/span>

    The signature will be removed by a write command.<\/span>

    Command (m for help): t<\/span><\/span>
    Selected partition 1<\/span>
    Hex code (type L to list all codes): fd<\/span><\/span>
    Changed type of partition 'Linux' to 'Linux raid autodetect'.<\/span>

    Command (m for help): p<\/span><\/span>
    Disk \/dev\/sdb: 465.8 GiB, 500107862016 bytes, 976773168 sectors<\/span>
    Units: sectors of 1 * 512 = 512 bytes<\/span>
    Sector size (logical\/physical): 512 bytes \/ 512 bytes<\/span>
    I\/O size (minimum\/optimal): 512 bytes \/ 512 bytes<\/span>
    Disklabel type: dos<\/span>
    Disk identifier: 0x5e7f68d2<\/span>

    Device     Boot Start       End   Sectors   Size Id Type<\/span>
    \/dev\/sdb1        2048 976773167 976771120 465.8G fd Linux raid autodetect<\/span>

    Filesystem\/RAID signature on partition 1 will be wiped.<\/span>

    Command (m for help): w<\/span><\/span>
    The partition table has been altered.<\/span>
    Calling ioctl() to re-read partition table.<\/span>
    Syncing disks.<\/span>

4.\ubcc0\uacbd\uc0ac\ud56d \ud655\uc778<\/strong>
  # mdadm -E \/dev\/sd[b-c]<\/em>
    \/dev\/sdb:<\/span>
       MBR Magic : aa55<\/span>
    Partition[0] :    976771120 sectors at         2048 (type fd)<\/span>
    \/dev\/sdc:<\/span>
       MBR Magic : aa55<\/span>
    Partition[0] :    976771120 sectors at         2048 (type fd)<\/span>

  # mdadm -E \/dev\/sd[b-c]1<\/em>
    mdadm: No md superblock detected on \/dev\/sdb1.<\/span>
    mdadm: No md superblock detected on \/dev\/sdc1.<\/span>

5.RAID \uc7a5\uce58 \uc0dd\uc131<\/strong>
  # mdadm --create \/dev\/md0 --level=0 --raid-devices=2 \/dev\/sdb1 \/dev\/sdc1<\/em>
    mdadm: Note: this array has metadata at the start and<\/span>
        may not be suitable as a boot device.  If you plan to<\/span>
        store '\/boot' on this device please ensure that<\/span>
        your boot-loader understands md\/v1.x metadata, or use<\/span>
        --metadata=0.90<\/span>
    Continue creating array? y<\/span>
    mdadm: Defaulting to version 1.2 metadata<\/span>
    mdadm: array \/dev\/md0 started.<\/span>
    # cat \/proc\/mdstat<\/span>
    Personalities : [raid1]<\/span>
    md0 : active raid1 sdc1[1] sdb1[0]<\/span>
          488253440 blocks super 1.2 [2\/2] [UU]<\/span>
          [>....................]  resync =  0.1% (605696\/488253440) finish=107.3min speed=75712K\/sec<\/span>
          bitmap: 4\/4 pages [16KB], 65536KB chunk<\/span>

    unused devices: <none><\/span>

6.RAID \uc7a5\uce58 \uc0dd\uc131 \ud655\uc778<\/strong>
  # mdadm -E \/dev\/sd[b-c]1<\/em>
    \/dev\/sdb1:<\/span>
              Magic : a92b4efc<\/span>
            Version : 1.2<\/span>
        Feature Map : 0x1<\/span>
         Array UUID : 0fe62843:e7d9d0e8:56b5b49a:69682d79<\/span>
               Name : db:0  (local to host db)<\/span>
      Creation Time : Sat Jun  1 04:09:43 2024<\/span>
         Raid Level : raid1<\/span>
       Raid Devices : 2<\/span>

     Avail Dev Size : 976506928 sectors (465.63 GiB 499.97 GB)<\/span>
         Array Size : 488253440 KiB (465.63 GiB 499.97 GB)<\/span>
      Used Dev Size : 976506880 sectors (465.63 GiB 499.97 GB)<\/span>
        Data Offset : 264192 sectors<\/span>
       Super Offset : 8 sectors<\/span>
       Unused Space : before=264112 sectors, after=48 sectors<\/span>
              State : active<\/span>
        Device UUID : 2fe4cb6b:c2be29d8:96db5e70:ce4628fa<\/span>

    Internal Bitmap : 8 sectors from superblock<\/span>
        Update Time : Sat Jun  1 04:10:48 2024<\/span>
      Bad Block Log : 512 entries available at offset 16 sectors<\/span>
           Checksum : 8e9ac22 - correct<\/span>
             Events : 13<\/span>


       Device Role : Active device 0<\/span>
       Array State : AA ('A' == active, '.' == missing, 'R' == replacing)<\/span>
    \/dev\/sdc1:<\/span>
              Magic : a92b4efc<\/span>
            Version : 1.2<\/span>
        Feature Map : 0x1<\/span>
         Array UUID : 0fe62843:e7d9d0e8:56b5b49a:69682d79<\/span>
               Name : db:0  (local to host db)<\/span>
      Creation Time : Sat Jun  1 04:09:43 2024<\/span>
         Raid Level : raid1<\/span>
       Raid Devices : 2<\/span>

     Avail Dev Size : 976506928 sectors (465.63 GiB 499.97 GB)<\/span>
         Array Size : 488253440 KiB (465.63 GiB 499.97 GB)<\/span>
      Used Dev Size : 976506880 sectors (465.63 GiB 499.97 GB)<\/span>
        Data Offset : 264192 sectors<\/span>
       Super Offset : 8 sectors<\/span>
       Unused Space : before=264112 sectors, after=48 sectors<\/span>
              State : active<\/span>
        Device UUID : bb646c05:8a3ebe24:2b3cfce6:c92a7010<\/span>

    Internal Bitmap : 8 sectors from superblock<\/span>
        Update Time : Sat Jun  1 04:10:48 2024<\/span>
      Bad Block Log : 512 entries available at offset 16 sectors<\/span>
           Checksum : 7c03f105 - correct<\/span>
             Events : 13<\/span>


       Device Role : Active device 1<\/span>
       Array State : AA ('A' == active, '.' == missing, 'R' == replacing)<\/span>

  \uc790\uc138\ud558\uac8c \uc0c1\ud0dc \uccb4\ud06c
  # mdadm --detail \/dev\/md0<\/em>
    \/dev\/md0:<\/span>
               Version : 1.2<\/span>
         Creation Time : Sat Jun  1 04:09:43 2024<\/span>
            Raid Level : raid1<\/span>
            Array Size : 488253440 (465.63 GiB 499.97 GB)<\/span>
         Used Dev Size : 488253440 (465.63 GiB 499.97 GB)<\/span>
          Raid Devices : 2<\/span>
         Total Devices : 2<\/span>
           Persistence : Superblock is persistent<\/span>

         Intent Bitmap : Internal<\/span>

           Update Time : Sat Jun  1 04:11:08 2024<\/span>
                 State : clean, resyncing<\/span>
        Active Devices : 2<\/span>
       Working Devices : 2<\/span>
        Failed Devices : 0<\/span>
         Spare Devices : 0<\/span>

    Consistency Policy : bitmap<\/span>

         Resync Status : 1% complete<\/span>

                  Name : db:0  (local to host db)<\/span>
                  UUID : 0fe62843:e7d9d0e8:56b5b49a:69682d79<\/span>
                Events : 17<\/span>

        Number   Major   Minor   RaidDevice State<\/span>
           0       8       17        0      active sync   \/dev\/sdb1<\/span>
           1       8       33        1      active sync   \/dev\/sdc1<\/span>

  \uac04\ub2e8\ud558\uac8c \uc0c1\ud0dc \uccb4\ud06c
  # mdadm --query \/dev\/md0<\/em>

7. \ub514\uc2a4\ud06c \ud3ec\ub9f7<\/strong>
  # mkfs -t ext4 \/dev\/md0<\/em>

8.fstab \ucd94\uac00<\/strong>
  # vi \/etc\/fstab<\/em>
  \/dev\/md0 \/mnt\/md0 ext4 defaults 1 2

9. RAID \uc2dc\uc791\uacfc \uc911\uc9c0<\/strong>
  mdadm --run \/dev\/md0<\/em>
  mdadm --stop \/dev\/md0<\/em><\/span>\n","protected":false},"excerpt":{"rendered":"

\u25a0 RAID-0 \ub300\uc0c1 \ub514\uc2a4\ud06c (RAID Level: https:\/\/namu.wiki\/w\/RAID)\/dev\/sdb 500GB\/dev\/sdc 500GB 1.mdadm \uc124\uce58  yum -y install mdadm  apt -y install mdadm 2.\ub300\uc0c1 \ub514\uc2a4\ud06c \ud30c\ud2f0\uc158 \uc0ad\uc81c  dd if=\/dev\/zero of=\/dev\/sdb bs=1024 count=1  dd if=\/dev\/zero of=\/dev\/sdc bs=1024 count=1 3.RAID \ud0c0\uc785\uc73c\ub85c \ud30c\ud2f0\uc154\ub2dd  # fdisk \/dev\/sdb (\uac19\uc740 \ubc29\ubc95\uc73c\ub85c sdc\ub3c4 \ud30c\ud2f0\uc154\ub2dd)     Welcome to fdisk (util-linux 2.32.1).    Changes will remain in […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[39],"tags":[],"class_list":["post-8155","post","type-post","status-publish","format-standard","hentry","category-os_linux_unix_macos"],"_links":{"self":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/8155","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8155"}],"version-history":[{"count":0,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/8155\/revisions"}],"wp:attachment":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8155"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8155"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}