ot margy(5-09-2007)

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Instalira se operatsionnata sistema na ediniiat ot diskovete. Nakraia ne se restartira, a se izliza s alt+f4 Izpulniava se slednata posledovatelnost ot komandi:

sysctl kern.geom.debugflags=16
gmirror label -v -b round-robin gm0 /dev/ad4

gm0 e noviiat mirror disk, a /dev/ad4 e diskut na koito e instalirana operatsionnata sistema. Za da se initsializira sistemata pri startirane:

echo geom_mirror_load="YES" > /boot/loader.conf

i v /etc/fstab se promenia: ad na gm, i se dobavia mirror sled /dev. Primer:

/dev/ad4s1a -> /dev/mirror/gm0s1a.

Proveriavat se promenite i se restartira mashinata.

V sluchai na nekorektno vuvedena informatsiia v /etc/fstab, ustroistvata niama da budat montirani. Pokazva se slednoto suobshtenie

Mounting root from ufs:/dev/gm0s1a
setrootbyname failed
ffs_mountroot: can't find rootvp
Root mount failed: 6

Manual root filesystem specification:
 <fstype>:<device>  Mount <device> using filesystem <fstype>
           e.g. ufs:da0s1a
 ?             List valid disk boot devices
 <empty line>       Abort manual input

mountroot>

S vuprositelna se pokazvat ustroistvata, koito mogat da se montirat

mountroot> ?

List of GEOM managed disk devices:
 mirror/gm0s1f mirror/gm0s1e mirror/gm0s1d mirror/gm0s1c mirror/gm0s1b
mirror/gm0s1a mirror/gm0s1 ad2s1 mirror/gm0 ad0s1 ad2 acd0 ad0 fd0

Montira se / diala i se korigira /etc/fstab. Restartira se i se produlzhava.
Dobavia se vtoriia disk:

gmirror insert gm0 /dev/ad5

Za da vidim rezultata:

gmirror list | more

Geom name: gm0
State: DEGRADED
Components: 2
Balance: round-robin
Slice: 4096
Flags: NONE
GenID: 0
SyncID: 1
ID: 2125638583
Providers:
1. Name: mirror/gm0
  Mediasize: 10262568448 (9.6G)
 Sectorsize: 512
 Mode: r6w5e2
Consumers:
1. Name: ad4
  Mediasize: 10262568448 (9.6G)
  Sectorsize: 512
  Mode: r1w1e1
  State: ACTIVE
  Priority: 0
  Flags: DIRTY
  GenID: 0
  SyncID: 1
  ID: 3986018406
2. Name: ad5
  Mediasize: 10262568448 (9.6G)
  Sectorsize: 512
  Mode: r1w1e1
  State: SYNCHRONIZING
  Priority: 0
  Flags: DIRTY, SYNCHRONIZING
  GenID: 0
  SyncID: 1
  Synchronized: 1%
  ID: 1946262342

ili

gmirror status

Pri otpadane na disk. Ako se dobavi nov disk i toi e sus sushtoto oboznachenie(tova znachi diskut da se slozhi na sushtiia ATA/SATA/RAID kanal) napr. /dev/ad5, sled startirane na sistemata, zapochva avtomatichna sinhronizatsiia. Ako oboznachenieto e razlichno ot tova na izgoreliia disk napr. /dev/ad6, se izpulniavat slednite komandi:

gmirror forget data
gmirror insert gm0 /dev/ad6

Protsedurata raboti.
Po-goliamata chast ot materiala e prevod ot slednite statii:
http://www.onlamp.com/pub/a/bsd/2005/11...
http://software.pmade.com/admintools/ar...


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