Rb6- Storage Management, Lvm, And File Systems

Front 1

what command is used to change filesystem size?

Back 1

chfs

Front 2

what does the migratepv command do?

Back 2

used to move the PPs from one or more LVs to one or more other PVs in the same VG.

Front 3

how can u reduce the size of a logical volume?

Back 3

1. backup data
2. remove it
3. recreate with smaller size.
4. restore data

Front 4

can the migratepv command move data between different volume groups?

Back 4

no

Front 5

If the file system is still busy and still cannot be unmounted, this could be due
to a kernel extension that is loaded but exists within the source file system.
The fuser command will not show these kinds of references since a user
process is not involved. Which command will?

Back 5

the genkex command will report on all
loaded kernel extensions.

Front 6

what command is used to turn off/on the allocation for the physical volume hdisk1?

Back 6

chpv -a {n|y} hdisk1

Front 7

what are the most common flags for the mklv command?

Back 7

-c (copies) a value between 1 and 3

-L (label) only can be 127 characters long.

Front 8

which command is used to remove a physical volume?

Back 8

rmdev -l pvname

Front 9

which command can be used to determine what is still active in a file system?

Back 9

The fuser command will return the
process IDs for all processes that have open references within a specified file
system as shown in the following example:
# fuser -xc /tmp
/tmp: 2910 3466 11654 26400

Front 10

what command is used to retrive detailed information about a physical volume?

Back 10

lspv hdiskn

Front 11

what command would you use to remove the system definition of a volume group from the ODM database?

Back 11

exportvg

Front 12

how would you list PP allocation by PV region

Back 12

lspv -p hdiskn

Front 13

which command can be run to indicate a large file enabled system?

Back 13

lsfs -q file_system

Front 14

what commands are used to set a physical volume unavailable or available?

Back 14

chpv -v {r|a} pvname

Front 15

if a log is manually created for a file system, what must the user run to clean out the new jfslog before the log can be used?

Back 15

logform

Front 16

when is the VGDA allocated?

Back 16

when the disk is assigned as a physical volume(with the mkdev command)

Front 17

If you receive one of the following errors from the fsck or mount commands, what might the problem be?
fsck: Not an AIX3 file system
fsck: Not an AIXV3 file system
fsck: Not an AIX4 file system
fsck: Not an AIXV4 file system
fsck: Not a recognized file system type
mount: invalid argument

Back 17

the problem may be a corrupted (or dirty) superblock.

Front 18

when is the actual volume group information placed in the VGDA?

Back 18

when the physical volume is assigned to a volume group (using the mkvg or extendvg commands).

Front 19

how do you increase the size of a LV?

Back 19

extendlv

Front 20

what is a disk quorum?

Back 20

a state in which 51 percent or more of the physical volumes in a volume group are accessible.

Front 21

what is the rmlv commmand for?

Back 21

used to remove a logical volume.

Front 22

the mklv command allows you to select one or two additional copies for each logical volume. what other method can be used to add mirroring to an existing logical volume?

Back 22

mklvcopy

Front 23

what is the syncvg command used for?

Back 23

to synchronize logical volume copies that are not current.

Front 24

what command would you use to make an available disk a physical volume?

Back 24

chdev -l hdisk1 -a pv=yes

this assigns a PVID to the disk

Front 25

what is the reorgvg command used for?

Back 25

to reorganize the physical partition allocation for a volume group according to the allocation characteristics of each logical volume.

Front 26

when rootvg mirroring has completed, what 3 tasks must be performed?

Back 26

1. run the bosboot command.
2. run the bootlist command.
3. reboot the system

Front 27

what is the important thing to remember when moving volume groups from system to system?

Back 27

the exportvg command is always run on the source system prior to importing the volume group to the target system.

Front 28

what is the VGSA?

Back 28

Volume Group Status Area. contains state infomation about phyusical partitions and phycal volumes.

Front 29

which command is used to copy a logical volume?

Back 29

cplv

Front 30

what does the mirrorvg command do?

Back 30

mirrors all the logical volumes on a given volume group.

Front 31

what formula determines the total space taken up by the logical volume?

Back 31

total lv size=PP size * LPs assigned to LV * Number of copies of the LV

Front 32

what is disk mirroring?

Back 32

the association of 2 or 3 physical partitions with each logical partition in a logical volume.

Front 33

what is the splitlvcopy command used for?

Back 33

splits copies from one logical volume and creates a new and separate logical volume from them

Front 34

what is the VGDA?

Back 34

Volume Group Descriptor Area. Contains info. describing all the logical volumes and all the phyusical volumes that belong to the volume group of which that physical volume is a member.

Front 35

what command will list all logical volumes on the system?

Back 35

lsvg | lsvg -il

Front 36

what command can be used to have a volume group automatically varied on/off during system restart?

Back 36

chvg -a{y|n} VolumeGroupName

Front 37

what command is used to unlock a volume group?

Back 37

chvg -u VolumeGroupName