Veranstaltungen/2009-12-04 ZFS-Workshop/Szenario: gemischter Pool

shl@sonnenkind:~$ mkfile 100m HDD0
shl@sonnenkind:~$ mkfile 100m HDD1
shl@sonnenkind:~$ mkfile 100m HDD2
shl@sonnenkind:~$ mkfile 100m HDD3
shl@sonnenkind:~$ mkfile 100m HDD4
shl@sonnenkind:~$ mkfile 100m HDD5
shl@sonnenkind:~$ mkfile 100m HDD6
shl@sonnenkind:~$ mkfile 100m HDD7
shl@sonnenkind:~$ mkfile 100m HDD8
shl@sonnenkind:~$ mkfile 100m HDD9

shl@sonnenkind:~$ pfexec zpool create testpool raidz2 ~/HDD0 ~/HDD1 ~/HDD2 ~/HDD3 ~/HDD4

shl@sonnenkind:~$ zpool status testpool
  pool: testpool
 state: ONLINE
 scrub: none requested
config:

        NAME                       STATE     READ WRITE CKSUM
        testpool                   ONLINE       0     0     0
          raidz2-0                 ONLINE       0     0     0
            /export/home/shl/HDD0  ONLINE       0     0     0
            /export/home/shl/HDD1  ONLINE       0     0     0
            /export/home/shl/HDD2  ONLINE       0     0     0
            /export/home/shl/HDD3  ONLINE       0     0     0
            /export/home/shl/HDD4  ONLINE       0     0     0

errors: No known data errors

Das wird einen Fehler geben...

shl@sonnenkind:~$ pfexec zpool add testpool raidz1 ~/HDD5 ~/HDD6 ~/HDD7 
invalid vdev specification
use '-f' to override the following errors:
mismatched replication level: pool uses 2 device parity and new vdev uses 1

... don't try this at home!

shl@sonnenkind:~$ pfexec zpool add -f testpool raidz1 ~/HDD5 ~/HDD6 ~/HDD7

shl@sonnenkind:~$ zpool status testpool
  pool: testpool
 state: ONLINE
 scrub: none requested
config:

        NAME                       STATE     READ WRITE CKSUM
        testpool                   ONLINE       0     0     0
          raidz2-0                 ONLINE       0     0     0
            /export/home/shl/HDD0  ONLINE       0     0     0
            /export/home/shl/HDD1  ONLINE       0     0     0
            /export/home/shl/HDD2  ONLINE       0     0     0
            /export/home/shl/HDD3  ONLINE       0     0     0
            /export/home/shl/HDD4  ONLINE       0     0     0
          raidz1-1                 ONLINE       0     0     0
            /export/home/shl/HDD5  ONLINE       0     0     0
            /export/home/shl/HDD6  ONLINE       0     0     0
            /export/home/shl/HDD7  ONLINE       0     0     0

errors: No known data errors

shl@sonnenkind:~$ pfexec zpool add testpool mirror ~/HDD8 ~/HDD9

shl@sonnenkind:~$ zpool status testpool
  pool: testpool
 state: ONLINE
 scrub: none requested
config:

        NAME                       STATE     READ WRITE CKSUM
        testpool                   ONLINE       0     0     0
          raidz2-0                 ONLINE       0     0     0
            /export/home/shl/HDD0  ONLINE       0     0     0
            /export/home/shl/HDD1  ONLINE       0     0     0
            /export/home/shl/HDD2  ONLINE       0     0     0
            /export/home/shl/HDD3  ONLINE       0     0     0
            /export/home/shl/HDD4  ONLINE       0     0     0
          raidz1-1                 ONLINE       0     0     0
            /export/home/shl/HDD5  ONLINE       0     0     0
            /export/home/shl/HDD6  ONLINE       0     0     0
            /export/home/shl/HDD7  ONLINE       0     0     0
          mirror-2                 ONLINE       0     0     0
            /export/home/shl/HDD8  ONLINE       0     0     0
            /export/home/shl/HDD9  ONLINE       0     0     0

errors: No known data errors

Ja, das ist herzhaft sinnlos so! :-)

Besseres Beispiel:

RAID-Z2 über fünf Festplatten:

shl@sonnenkind:~$ pfexec zpool create testpool raidz2 ~/HDD0 ~/HDD1 ~/HDD2 ~/HDD3 ~/HDD4

shl@sonnenkind:~$ zpool status testpool
  pool: testpool
 state: ONLINE
 scrub: none requested
config:

        NAME                       STATE     READ WRITE CKSUM
        testpool                   ONLINE       0     0     0
          raidz2-0                 ONLINE       0     0     0
            /export/home/shl/HDD0  ONLINE       0     0     0
            /export/home/shl/HDD1  ONLINE       0     0     0
            /export/home/shl/HDD2  ONLINE       0     0     0
            /export/home/shl/HDD3  ONLINE       0     0     0
            /export/home/shl/HDD4  ONLINE       0     0     0

errors: No known data errors

Weitere fünf Festplatten in den testpool:

shl@sonnenkind:~$ pfexec zpool add testpool raidz2 ~/HDD5 ~/HDD6 ~/HDD7 ~/HDD8 ~/HDD9

shl@sonnenkind:~$ zpool status testpool
  pool: testpool
 state: ONLINE
 scrub: none requested
config:

        NAME                       STATE     READ WRITE CKSUM
        testpool                   ONLINE       0     0     0
          raidz2-0                 ONLINE       0     0     0
            /export/home/shl/HDD0  ONLINE       0     0     0
            /export/home/shl/HDD1  ONLINE       0     0     0
            /export/home/shl/HDD2  ONLINE       0     0     0
            /export/home/shl/HDD3  ONLINE       0     0     0
            /export/home/shl/HDD4  ONLINE       0     0     0
          raidz2-1                 ONLINE       0     0     0
            /export/home/shl/HDD5  ONLINE       0     0     0
            /export/home/shl/HDD6  ONLINE       0     0     0
            /export/home/shl/HDD7  ONLINE       0     0     0
            /export/home/shl/HDD8  ONLINE       0     0     0
            /export/home/shl/HDD9  ONLINE       0     0     0

errors: No known data errors

---

Quellen:

• man-Pages

Szenario: Spare-Platten | Agenda | Szenario: ungleicher Pool

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