Linux\tgEFARAIDmEnE


http://rdt17.blogspot.jp/2010/05/mdadmraid.html
---------------------------
 mdadmRAID\zi܂Ƃ)
---------------------------
* RAID̍\z
* fdiskpăp[eBV쐬
(̂Ƃ̃p[eBV^Cv0xfd(Linux RAID(auto detect))ɂĂƕ₷)

* RAID̍\z

    # mdadm -C /dev/md0 -l5 -n3 /dev/hdd[123]

* -C͐VK쐬Ɏw肷IvV--createƓӖ
* /dev/md0͍ŏIIɏoオRAIDfoCXw肷iĂɍĂj
* -l5RAIDx\ 0,1,5,6w\ --level=raid5Ǝw肵ĂӖ
* -n3̓foCX̐(HDD̐) --raid-devices=3Ǝw肵Ă
* /dev/hdd[123]RAID\HDD ̗ł͒PHDDō\Ă邪{/dev/hd[bcd]1݂ɕIɈႤfoCXw肷

* XyAfBXN̒ǉ

    # mdadm /dev/md0 --add /dev/hdd4

mdadm -D /dev/md0ŃXyAfBXN݂邱ƂmFł

* RAID̊Ď
* proc猩

    cat /proc/mdstat 

(watch -n 1 cat /proc/mdstat@݂ɂƂPbƂɂ̃R}h𔭍sĂ̂ŕ֗)

* ڍׂɌ

    mdadm -D /dev/md0



* RAID̍č\z(HDD̏᎞̑Ώ)
* ̏}[Nt

    # mdadm /dev/md0 -f /dev/hdd1 

XyAfBXNȂč\zn܂ȂȂ

* RAIDAC폜

    # mdadm /dev/md0 -r /dev/hdd1

̌fBXN

* ACɒǉ

    # mdadm /dev/md0 -a /dev/hdd1



* RAID̉
* AC̒~

    # mdadm -S /dev/md0


* X[p[ubN̍폜

    # mdadm --zero-superblock /dev/hdd1



* ̑
* ȑO݂ĂRAIDfoCXč\zf[^Tx[W̕(KNOPPIXł̔F)Qlɂ

    # mdadm -A /dev/md0 /dev/hd[efgh]1 


* /etc/mdadm/mdadm.conft@C

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

ăACނƂ炵
J[l玩N̏ꍇ͈ӖȂ

* Debian Lenny̏ꍇJ[l玩œǂݍރ[hƂwł

    # dpkg-reconfigure mdadm 

ōĐݒ肷
(J[lŎNꍇ/etc/mdadm/mdadm.conf͕KvȂ)

*2fBXNꂽ狭IɋN
mdadm -A /dev/md0 -u 3fee8ddc:fc710c65:daa5f7c5:4109bf44 --run --force

QlN
Emdadm(8) ver.1.5 man page [{]
  http://www.ioss.jp/sohodiy/mdadm8-1_5.html
Ew mdadm wiki
  http://okkun-lab.rd.fukuoka-u.ac.jp/wiki/?Tips%2FLinux%2Fmdadm
EumdadmvɂRAID5̍\z
  http://www.crimson-snow.net/tips/linux/mdadm_raid5.html


{ ------------------------------------------------------------------------
4: mdadm(8) ver.1.5 man page [{]

MDADM(8)
@

mdadm - Linux \tgEFA RAID md foCX̊Ǘ
@
mdadm [[h] <RAIDfoCX> [IvV] <AC\foCX(̃Xg)>
T@v

RAID foCX 2 ȏ̎ubNfoCXpčꂽzfoCXłB ̃fBXNhCup[eBV܂Ƃ߂ 1 ̃t@CVXeƂėp邱ƂłB RAID ̃xɂ邪Af[^̋L^璷邱Ƃł邽߃fBXŇ̏ɂf[^ł邱Ƃ҂łB

Linux ̃\tgEFARAID md (Multiple Devices) foCXhCoƂĎĂB  Linux ł̓jAmd foCXCRAID 0 (XgCsO)CRAID 1 (~[O)CRAID 4CRAID 5CRAID 6 ă}`pX(MULTIPATH) T|[gĂB
}`pXƂ̂̓\tgEFA RAID ł͂AI 1 ̋Lu𕡐̃pXŃANZXł悤ɂ̂łA ̃foCX\_ RAID ƋʂĂB

mdadm  MD foCX̍쐬CǗCăj^s߂̃vOłB @\Iɂ͊ raidtools ƎĂ邪Amdadm ɂ͎̂悤ȓB

    mdadm ̓R}h̏Wł͂Ȃ 1 ̃vOłB
    mdadm ł͂قƂǂ̋@\RtBOt@CŎsłAftHgł̓RtBOt@CgȂ悤ɂȂĂB  mdadm ̓RtBOt@CǗx@\ĂB
    mdadm  raidtools ł͓ȂACɊւlXȏ\邱ƂłB (QueryCDetailCExamine Ȃǂɂ) 

mdadm  raidtools ̃RtBOt@Cł /etc/raidtab SgȂB ɕʂ̃RtBOt@Cp邪AړI /etc/raidtab Ƃ͈قȂB
[h

mdadm ɂ͎ 6 ̎呀샂[h

Assemble
    ȑOɍ쐬ꂽAC̍\ 1 ̃ANeBuACҐB AC\foCX͖IɎw肷邱Ƃł邵邱ƂłB mdadm ͂ꂼ̃foCX`FbNŊSȃACҐ邪AKvɉċŨX[pubNgĕsSȃACҐ邱ƂłB 
Build
    foCXƂ̃X[pubNȂÂ^CṽAC(KV[AC)B 
Create
    foCXƂ̃X[pubNACB 
Manage
    ɂACɂāAXyAfoCXǉ茇ׂ̂foCXACOȂǂ̊ǗsB 
Misc
    ̃[h͌X̃foCXɑ΂ėlXȑsB Ⴆ MD X[pubŇCÂX[pubN̏CANeBuAC̒~ȂǁB 
Follow or Monitor
    1 ȏ md foCXj^AԕωoĎw肵ANVNB ̃[h͑ΏۂƂȂԕω RAID 1C4C5C6 ܂̓}`pXł݈̂ӖB RAID 0  jA ł̓XyAfoCXsǃfoCXƂTOȂ߁Aj^ӖȂB 

IvV

IvV͎̒ʂB

-A, --assemble
    ȑO݂ĂACҐB 
-B, --build
    X[pubNȂAC(KV[AC)B 
-C, --create
    AC̐VK쐬sB 
-Q, --query
    md foCX md AC̍\foCXɂĂ̏\B 
-D, --detail
    1 ܂͕ md foCX̏ڍׂȏ\B 
-E, --examine
    1 ܂͕̃foCX md X[pubN̓e\B 
-F, --follow, --monitor
    j^[hIB 
-h, --help
    wvbZ[W\B ̃IvVɑă[ht邱ƂŁÃ[hɂẴwvbZ[W\B 
--help-options
    R}hC̉߂A悭gIvVɂďڍׂȃwv\B 
-V, --version
    mdadm ̃o[W\B 
-v, --verbose
    o[{[Y\B 葽̏\B 
-b, --brief
    Tv\B  --detail  --examine ƋɗpB 
-f, --force
    ̑苭IɍsB ۂ̈Ӗ̓[hɂĈقȂ邽߁Ae[h̐QƂ̂ƁB 
-c, --config=
    RtBOt@C̎wB ftHg /etc/mdadm.conf B Ƃ gpartitionsh ƂPꂪw肳ƁAt@CƂĂł͂Ȃ /proc/partitions 瓾ƂɁAΏۂƂȂfoCX̃XgIɎ擾B ܂ gnoneh ƂPꂪw肳ƃRtBOt@C͋Ƃ݂Ȃ (܂ /etc/mdadm.conf ݂Ă̓e͓ǂ܂Ȃ) B 
-s, --scan
    s₤߂ɃRtBOt@C /proc/mdstat XLB ̃IvV͕sEEEႦ΃AC\foCXCACfoCX(/dev/md*)CAC IDCA[gʒmȂǂRtBOt@Cł /etc/mdadm.conf 瓾邱Ƃ mdadm ɋB
     MISC [hɂ--detail܂ --stop IvVƈꏏɗpꂽƂ́AAC̃Xg /proc/mdstat 瓾B 

Create ܂Build[h̃IvV:

-c, --chunk=
    P(`NTCY)LoCgŎw肷BftHg 64B 
--rounding=
    jAACɂۂߌWw (=`NTCY) B 
-l, --level=
    RAID ̃xw肷B --create ɂĎwłl͎̒ʂB

        linear, raid0, 0, stripe, raid1, 1, mirror, raid4, 4, raid5, 5, raid6, 6, multipath, mp

    ̂͓ӖłB Ȃ --build ł linear, raid0, 0, stripe ݂̂LłB
-p, --parity=
    RAID 5 ̃peBASYw肷B włl͎̒ʂB

        left-asymmetric, left-symmetric, right-asymmetric, right-symmetric, la, ra, ls, rs

    ftHg left-symmetric łB
--layout=
    --parityƓB 
-n, --raid-devices=
    AC̃ANeBuȃfoCX̐B ̐(q)XyAfoCX̐𑫂̂AR}hCŎw肵\foCX̐ƈvȂ΂ȂȂB ꂪ 1 ɂȂ邱Ƃ͖{肦ȂA--force IvVt linearCmultipathCraid0Craid1 ł͎w\ƂȂB raid4  raid5 ł͋ȂB

    xACƁA̐l͕ύXłȂƂɒӁB
-x, --spare-devices=
    ̃ACɑ΂XyA(])foCX̐BXyA͌ォǉOłB ̐ RAID ҐɎgĂfoCX̐𑫂̂́AR}hCŎw肵 AC\foCX̐ƈvȂ΂ȂȂB 
-z, --size=
    RAID 1/4/5 ɂehCu̎gpeʂLoCgŎwB ̓`NTCY̔{łȂ΂ȂȂB܂hCu̍ŏIɍ RAID X[pubN̂߂̃GA 128Kb cĂKvB

    ꂪw肳ȂƃhCu̒̍ŏ̃TCYpB ܂hCuԂ̃TCY̍ق1%ȏ゠ƌxoB

Assemble[h̃IvV:

-u, --uuid=
    ҐAC uuid w肷B  uuid ȂfoCX̓AC쐬̑ΏۊOƂȂB 
-m, --super-minor=
    쐬AC̃}Ci[foCXԍw肷B ̔ԍȂfoCX̓AC쐬̑ΏۊOƂȂBAC /dev/md1 ƂčƁÃAC\foCX̃X[pubÑ}Ci[ԍ 1 ƂȂB͌ŃAC /dev/md2 ƂĕҐꂽƂĂςȂB

    ɑ΂A--super-minor= ̈ gdevh ƂPw肷ƁAҐ悤Ƃ md foCX̃}Ci[ԍԍƓԍfoCXgB Ⴆ /dev/md0 ҐꍇAmdadm ̓}Ci[ԍ 0 ̃foCXTB
-f, --force
    X[pubNÂĂAC̍쐬sB 
-R, --run
    AC\hCu̐KvɖȂĂACNB ʏhCu̐Ȃꍇ --scan w肳Ȃꍇ̓AC͕ҐĂN͂ȂB ̃IvVɂAƂɂN悤ƂB 
-U, --update=
    ACҐAefoCX̃X[pubNXVB LȈ sparc2.2CsummariesCsuper-minor ̂ꂩłB

    sparc2.2 IvV RAID pb`{ꂽ Linux 2.2  Sparc }Vő点č쐬ꂽAC̃X[pubN␳B ̃J[lōꂽAC̃X[pubNɂ̓ACg̖肪邱Ƃ킩ĂB --examine --sparc2.2 Ƃ邱Ƃł̖̗L𒲂ׂ邱ƂłB

    super-minor IvV͊efoCX̃X[pubÑ}Ci[ԍAҐAC̃}Ci[ԍɕύXB J[l 2.6 ȏł͂ꂪIɍs邽߁ÃIvVw肷Kv͖B

    summaries IvV̓AC̃X[pubÑT}B T}Ƃ͂̃AC\foCX̏󋵂̂ŁAg[^CғCANeBuCsǁCXyÅe̂ƂłB

Manage mode[h̃IvV:

-a, --add
    w肳ꂽfoCX(Q)AC~߂ɒǉ (hotadd) B 
-r, --remove
    w肳ꂽfoCX(Q)폜B ΏۃfoCX̓ANeBułĂ͂ȂȂB ܂ُ킪ĕsǂƂꂽfoCXXyAfoCXȂǂɌB 
-f, --fail
    w肳ꂽfoCX(Q)ɑ΂Asǂł邱Ƃ}[Nt 
--set-faulty
    --fail ƓB 

Examine mode[h̃IvV:

--sparc2.2
    RAID pb`𓖂Ă Linux 2.2 J[lJ[lł́AAC쐬ɂĕsȃX[pubN邱ƂB ȂƂ 2.4 J[lƂ̌݊͂ȂB--sparc2.2  -examine IvV𓯎ɗ^邱ƂŁA̖̗LmF邱ƂłB ̖肪oꂽꍇ́A--assemble --update=sparc2.2 Ƃ邱ƂŃACҐɂC邱ƂłB 

Misc mode[h̃IvV:

-R, --run
    Iɍ\ꂽACNB 
-S, --stop
    ACANeBuɂAׂẴ\[XJB 
-o, --readonly
    ACɓǎp}[NtB 
-w, --readwrite
    ACɓǏ}[NtB 
--zero-superblock
    foCXL md X[pubNꍇA̓e[ŏ㏑B --force IvVtƁAX[pubN̐Eُɂ炸X[pubNɑ镔[ŏ㏑B 
-t, --test
    --detail ƓɗpꍇAmdadm ̏IR[hɃfoCX̏Ԃ𔽉fB 

Monitor mode[h̃IvV:

-m, --mail
    A[g[̑tw肷B 
-p, --program, --alert
    CxgoɋNvOw肷B 
-d, --delay
    mdadm  md AC̏Ԃ|[ObŎw肷B ftHg 60 bB 
-f, --daemonise
    mdadm j^sꍇAobNOEhf[ƂB ܂ mdadm ͒[Ƃ̐ڑ؂藣qvZXƂċNB ̃vZX ID ͕Wo͂ɏo͂B ̋@\ --scan Ƌɗp邱Ƃz肵ĂB ̏ꍇARtBOt@CɃA[g[̑tAhXĂ邩AA[gɋNvO`Ăꍇ̂݃f[ƂȂăj^pB 
-1, --oneshot
    AC̃`FbN 1 񂾂sB ɂ NewArray CxgsADegradedArray (kރAC) CxgmɔsB ܂ cron XNvgɂA

        mdadm --monitor --scan -1

    ̂悤ɂ邱ƂŁAIɃAC̏Ԃ`FbNAȂkނĂmɃCxg𔭍s邱ƂłB
-t, --test
    mdadm NAACox TestMessage A[g (Cxg) 𔭐B ̃A[g (Cxg) ɂA[g[MƋɁACxg̓A[gvOɓ͂B ̃IvV̓A[g@\삷邩ǂeXĝɗpB 

ASSEMBLE [h

    1: mdadm --assemble <RAIDfoCX> <IvV>y<AC\foCX(Q)>...
    2: mdadm --assemble --scan <RAIDfoCX(Q)>y<IvV>...
    3: mdadm --assemble --scan options...

̃AC\foCXAC(Q)ҐB ̂߂ɂ͂ꂼ̃ACɂ md foCXCAC IDCč\foCX̐mKvBɂ͂̕@B

 1 ̂悤 --scan IvVtȂꍇAŏɎw肳ꂽfoCX݂̂ md foCX (RAID foCX) ƂȂȂ̃foCX̓AC\foCXƂ݂ȂB  2 ł͎w肳ꂽfoCXׂ͂ md foCXƂ݂ȂAҐsB  3 ̂悤ɃfoCX؎w肳Ȃꍇ́ARtBOt@CɋLqĂ邷ׂĂ md foCX̕ҐsB

foCX 1  --scan IvV͕tȂꍇAmdadm  --scan ^ꂽ̂Ƃē삵AID ̓RtBOt@C瓾B

Ȃ݂ ID 𓾂@ƂẮA

    --uuid IvVŎw肷
    -super-minor IvVŎw肷
    RtBOt@CɋLq
    R}hCɋLqꂽ\foCXQ̍ŏ̃foCX̃X[pubN瓾 

B

foCX̓R}hCŗ^邩ARtBOt@CɋLqĂKvB e\foCX͐ md X[pubNĂ邱ƂOŁAłȂꍇ͕Ґ̑ΏۂƂȂȂB

RtBOt@C --config ŖIɎw肷邩A--scan ^邱ƂňÖٓIɎw肷B ҂̏ꍇ̓ftHg /etc/mdadm.conf QƂB

ASSMBLE [hŕҐꂽAC͎IɋNB  --scan tȂꍇŃR}hCŎw肵AC\foCX̐sAkމ^]]VȂꍇ́AG[̔h~邽߂ɋNȂB łNꍇ --run B RAID 1C4C5C6 ł͂P[X肤B
BUILD [h

    : mdadm --build <RAIDfoCX> --chunk=X --level=Y --raid-devices=<AC\foCX(Q)>

̎g --create ƎĂB قȂ̂ --build ł͌Â^CṽACEEEȂ킿X[pubNȂAC邱ƂłB ̂悤ȃAC͍ŏɃACꍇォACҐꍇSςȂB PɃf[^̗L̍łB ܂҂̏ꍇ͋Mdȃf[^Ă̂ł낤ƂƂłB

RAIDx 0Craid0Clinear ̂ꂩłB SẴfoCX̓R}hCŗ^Ȃ΂ȂȂBAC̍쐬ƎIɋNB
CREATE [h

    : mdadm --create <RAIDfoCX> --chunk=X --level=Y --raid-devices=<AC\foCX(Q)>

V md ACAfoCXQҐANB foCX RAID X[pubNt@CVXe邩ǂ`FbNB ܂foCX̗eʂ̍ق 1 % 𒴂ĂȂǂ`FbNB

炩̖ƃAC͋NȂB  --run ^炽ꍇ͋NB

ACkޏ(foCX̐s)Őꍇ́Amissing ƂPfoCX̑ɗ^B ɂ mdadm ̓AC̑ΉXbgɂ܂܂ɂB RAID 4  RAID 5 ̏ꍇ 1 Xbg̕ŝ݋ARAID 6 ̏ꍇ 2 Xbg܂łƂȂB ܂ RAID 1 ̏ꍇ͍Œ 1 ̎foCXΗǂA͕sĂĂǂB

RAID 5 AC̍쐬̍ہAmdadm ͗]XyAfoCXgkޏԂ̃ACIɍB ŔAkޏԂ̃ACŃXyAAN[łȂkޏԂ̃AC̃peB𓯊ʏ퍂łB  -I IvV --force IvVꍇ͂̋@\͓ȂB

--create ƋɗpʓIȊǗIvV͎̒ʂłB

--run
    ̃foCXgp̉\ĂACNB 
--readonly
    ACǍݐpŋNB ͂܂T|[gĂȂB 

MANAGE [h

    : mdadm <RAIDfoCX> <IvV>... <AC\foCX>...

X̃foCXɑ΂A폜CǉCĕsǂƔF肷邱ƂłB 1 ̃R}hCŕ̑włBႦ΁A

    mdadm /dev/md0 -f /dev/hda1 -r /dev/hda1 /a /dev/hda1

́AŏɃAC /dev/md0 \foCX /dev/hda1 ɕsǃ}[NtAAC폜AŌɃXyAƂčĒǉB 1̃R}hőł̂ 1 md ACɌB
MISC [h
: mdadm <IvV>... foCX(Q) ...

MISC[hł͈قȂfoCXɑ΂鑀ʂ邽߂̔ԍ܂ނƂB

\ȑ͎̒ʂB

--query
    w肳ꂽfoCXANeBu md ACAmd AC̍\foCX̏ꍇAɊւ񂪒ׂ\B 
--detail
    w肳foCX̓ANeBu md foCXł邱ƁB mdadm ͂̃ACɂĂ̏ڍ׏\B --brief  --scan ^ƁA\͏ȂȂ邪A/etc/mdadm.conf ɋLq̂ɓsǂ`ƂȂB mdadm ]̏𓾂ꂽꍇ̏IR[h 0 ƂȂB  --test IvV^ꂽꍇ̏IR[ĥ͎悤ɂȂB

        0 	̃AC͐ɓ삵ĂB
        1 	̃ACɂ͏ȂƂ 1 ̕sǃfoCX܂܂B
        2 	̃ACɂ͕̕sǃfoCX܂܂Ă邽ߎgpłȂ (RAID 4 ܂ RAID 5)
        4 	foCX̏擾ɎsB

--examine
    w肳foCX md foCXł͂ȂAAC̍\foCXł邱ƁB mdadm ͂ md X[pubNǎAe\B --brief  --scan ^ƁA1 ̃AC\镡̃foCX 1 ̃GgƂăO[vꂽ`ŕ񍐂B  /etc/mdadm.conf ɋLq̂ɓs̗ǂ`łB

    foCXw肹 --scan^ƁARtBOt@CɋLqꂽSẴfoCXɑ΂钲sB
--stop
    w肳ꂽ md foCXݎgĂȂꍇɌAw肳ꂽANeBu md foCXANeBuɂB 
--run
    Iɍ\ꂽACtɃANeBuɂB 
--readonly
    w肳ꂽfoCXݎgĂȂꍇɌAw肳ꂽANeBuȃACǎpƂB 
--readwrite
    ǎpƂȂĂACǏ\ƂB 
--scan
    --examine SĂ̑ɂẮȂΏۂ /proc/mdstat ǎׂẴACƂȂB --examine ̏ꍇ́ARtBOt@CɋLqꂽSẴfoCXɂČsB 

MONITOR [h

    : mdadm --monitor <IvV>... <RAIDfoCX>...

ׂĂ md ACɑ΂|[OsƂňُ퓙oA񍐂B ̃[hɂ mdadm ͊ĎΏۂƂȂAC݂A1 xNƏIȂB ʏ̓obNOhvZXƂĎsB

܂ mdadm ͌̏ႵhCuACɃXyAhCuꍇA̓XyAO[vɑAC̃XyAhCu𗬗p悤ɂ邱ƂłB

R}hCɃfoCX̃Xg^ꂽꍇ́Amdadm ͎w肳ꂽfoCX݂̂̊ĎsB foCX̎w肪ꍇ̓RtBOt@CɋLڂꂽׂẴfoCXĎΏۂƂȂB X--scan ^ /proc/mdstat 猩foCXΏۂƂĉB

j^Oɉ炩̃CxgƁAOvOw肳Ăꍇ͂NA[AhXw肳Ăꍇ͂փA[g[𑗐MB

OvO̓Cxg邽т 2 Ȃ 3 ̈^ċNB 1ڂ̈̓Cxg̖(LQ)C2 ڂ͉e󂯂 md foCXA 3 ڂ͑ΏۂƂȂfoCXłB 3 ڂ̈́AႦ΃AC̍\vfłubNfoCX 1 ̏ႵꍇȂǂɕtB

--scan ^ꂽꍇ́AOvO[AhX mdadm ̃R}hCRtBOt@CŎw肳ĂKvB ǂɂw肳ĂȂꍇ mdadm ͊ĎsȂB ɑ΂A--scan^ĂȂꍇ́AvO⃁[AhXw肳ĂȂĂĎ͍sB CxgNꍇ͂̓ePɕWo͂ɏo͂B

Cxg̎ނ͎̒ʂ:

    DeviceDisappeared
        ܂܂őgݍ܂Ă͂ md ACȂB 
    RebuildStarted
        md AC̍č\zn܂B 
    RebuildNN
        md AC̍č\z NN p[ZgIB NN  20C40C60C80 ̂ꂩB 
    Fail
        ANeBuȃAC\foCX 1 sǂƃ}[NꂽB 
    FailSpare
        XyAfoCXɂsǃhCu̒usB 
    SpareActive
        XyAfoCXɂsǃhCu̒uEč\zANeBuƂȂB 
    NewArray
        VmdAC /proc/mdstat ɌoꂽB 
    DegradedArray
        kޏԂ̐VȃACB ̃Cxg mdadm ɔcĂACkޏԂɂȂꍇɂ͔ȂB VɌACkޏԂꍇɂ̂ݔB 
    MoveSpare
        XyAhCuXyAO[vŕʂ̃AC̕sǃhCu̒uɎgpꂽB 
    TestMessage
        --test IvVtŋNAACoB 

[M̑ΏۂƂȂCxg FailCFailSpareCDegradedArrayCTestMessage  4 łB ܂OvŐN͑SẴCxgΏۂƂȂB OvOɂ 2 Ȃ 3 ̈nB ͏ɃCxgCACfoCXCďꍇɂđ 3 ł 2 foCXB

ꂼ̃Cxg̓ACfoCX (/dev/md1 Ȃ) ƁA(ꍇ邪)  2 foCX֘AtB FailCFailSpareCSpareActive ł͑ 2 foCX̓AC\foCXƂȂAMoveSpare ł̓XyAhCüړACfoCXƂȂB

mdadm XyA{̃ACʂ̃ACɗpł悤ɂ邽߂ɂ́ÃAĆARtBOt@CœXyAO[vȂ΂ȂȂB XyAO[v͂ǂȕłǂAPɑ̃XyAO[vƋʂł閼OłΗǂB

mdadm AAC̕KvANeBufoCXsĂ邱ƂoÃACp̃XyAfoCXꍇAXyAO[v̗]XyAhCuȂǂׂB ]XyAhCuƂ́AACȏԂłXyAhCuҋ@ĂԂłB mdadm ͌̃AC炱̗]XyAhCu폜AsĂACɒǉ悤ƂB 폜ĂǉɎsꍇ́ÃAC̃XyAhCuƂĖ߂B
gp

    foCXRAIDAC܂͂̈ꕔ𒲂ׁAɂĂ̊Tv\B

        mdadm -Q /dev/foCX

    WRtBOt@CɋLqĂ邷ׂẴACҐANB ͒ʏVXẽX^[gAbvt@CɏB

        mdadm -As

    ~\ (ݎgĂȂȂ) ׂẴAC~B ͒ʏVXẽVbg_EXNvgɏB

        mdadm --stop --scan

    [AhXOvORtBOt@CɋLqĂOŁAׂẴACĎB|[O 2 ƂB

        mdadm -Fs --delay=120

    /dev/hda 1  /dev/hdc 1 g RAID 1 AC /dev/md0 쐬B

        mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/hd['ac']1

    ݃ANeBu IDE ܂ SCSI hCup[eBVō\ꂽ̃ACƂARtBOt@C̐`쐬B

        echo 'DEVICE /dev/hd*['0-9'] /dev/sd*['0-9']' > mdadm.conf
        mdadm --detail --scan >> mdadm.conf

    ō쐬ꂽt@Cɂ͕svȏڍ׏܂܂邽߁AۂɎgpOɕҏWKv邱ƂɒӁB
    ׂĂ IDECSCSI hCu (p[eBVł͂Ȃ) Ґ\ȃACTȀK؂ȃtH[}bgŃRtBOt@CɏoB

        echo 'DEVICE /dev/hd['a-z'] /dev/sd*['a-z']' > mdadm.conf
        mdadm --examine --scan --config=mdadm.conf >> mdadm.conf

    ō쐬ꂽt@Cɂ͕svȏڍ׏܂܂邽߁AۂɎgpOɕҏWKv邱ƂɒӁB  device= ̃Gg͗v`FbNB
    /proc/partitions ǂŃfoCXXg쐬A md X[pubNo΂̊Tv\B

        mdadm --examine --brief --scan --config=partitions
        mdadm -Ebsc partitions

    /proc/partitions ǂŃfoCXXg쐬Amd X[pubÑ}Ci[ԍ 0 ̃foCX݂̂g /dev/md0 ҐB

        mdadm -Ac partitions -m 0 /dev/md0

    RtBOt@CɃ[AhXA[g(O)vOw肳Ă mdadm j^[hɂăobNOEhő点ASĂ md foCXĎB ܂̂Ƃ mdadm  pid (vZX ID)  /var/run/mdadm ɏoB

        mdadm --monitor --scan --daemonise > /var/run/mdadm

    Create [hɊւwv\B

        mdadm --create --help

    RtBOt@C̏ɂẴwv\B

        mdadm --config --help

    ʏ̃wv\B

        mdadm --help

֘At@C

/proc/mdstat
    /proc t@CVXepłꍇA/proc/mdstat ׂ͂ẴANeBumdfoCX̏\B mdadm ł Misc [h --scan IvVtꍇɂ̏găACTB ܂j^[hł̓AC̍č\zĎۂɂpB 
/etc/mdadm.conf
    ̃RtBOt@Cɂ MD X[pubNô߂̃XLsׂfoCXLqB ܂m MD ACɂĂ UUID Ȃǂ̎ʏLqB
    ڍׂ mdadm.conf(5) QƂ̂ƁB 



mdadm ͈ȑO mdctl ƂOłB
SEE ALSO

RAID ̊exɂĒm肽l͎QƂ̂ƁB

    http://ostenfeld.dk/~jakob/Software-RAID.HOWTO/

RAID hCo̍ŐVł͎̃TCgłB

    ftp://ftp.kernel.org/pub/linux/kernel/people/mingo/raid-patches
    ܂
    http://www.cse.unsw.edu.au/~neilb/patches/linux-stable/

mdadm.conf(5), md(4)
raidtab(5), raid0run(8), raidstop(8), mkraid(8)
{

ΐ׌ (ishikawa@ioss.jp)
{hLg̍Ĕzz͎RƂB{|󕨂Ɋւ钘쌠͕ȂB
2004N519

v1.5.0 	                                                               MDADM(8)







