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37 Cards in this Set

  • Front
  • Back
what command is used to change filesystem size?
what does the migratepv command do?
used to move the PPs from one or more LVs to one or more other PVs in the same VG.
how can u reduce the size of a logical volume?
1. backup data
2. remove it
3. recreate with smaller size.
4. restore data
can the migratepv command move data between different volume groups?
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?
the genkex command will report on all
loaded kernel extensions.
what command is used to turn off/on the allocation for the physical volume hdisk1?
chpv -a {n|y} hdisk1
what are the most common flags for the mklv command?
-c (copies) a value between 1 and 3

-L (label) only can be 127 characters long.
which command is used to remove a physical volume?
rmdev -l pvname
which command can be used to determine what is still active in a file system?
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
what command is used to retrive detailed information about a physical volume?
lspv hdiskn
what command would you use to remove the system definition of a volume group from the ODM database?
how would you list PP allocation by PV region
lspv -p hdiskn
which command can be run to indicate a large file enabled system?
lsfs -q file_system
what commands are used to set a physical volume unavailable or available?
chpv -v {r|a} pvname
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?
when is the VGDA allocated?
when the disk is assigned as a physical volume(with the mkdev command)
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
the problem may be a corrupted (or dirty) superblock.
when is the actual volume group information placed in the VGDA?
when the physical volume is assigned to a volume group (using the mkvg or extendvg commands).
how do you increase the size of a LV?
what is a disk quorum?
a state in which 51 percent or more of the physical volumes in a volume group are accessible.
what is the rmlv commmand for?
used to remove a logical volume.
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?
what is the syncvg command used for?
to synchronize logical volume copies that are not current.
what command would you use to make an available disk a physical volume?
chdev -l hdisk1 -a pv=yes

this assigns a PVID to the disk
what is the reorgvg command used for?
to reorganize the physical partition allocation for a volume group according to the allocation characteristics of each logical volume.
when rootvg mirroring has completed, what 3 tasks must be performed?
1. run the bosboot command.
2. run the bootlist command.
3. reboot the system
what is the important thing to remember when moving volume groups from system to system?
the exportvg command is always run on the source system prior to importing the volume group to the target system.
what is the VGSA?
Volume Group Status Area. contains state infomation about phyusical partitions and phycal volumes.
which command is used to copy a logical volume?
what does the mirrorvg command do?
mirrors all the logical volumes on a given volume group.
what formula determines the total space taken up by the logical volume?
total lv size=PP size * LPs assigned to LV * Number of copies of the LV
what is disk mirroring?
the association of 2 or 3 physical partitions with each logical partition in a logical volume.
what is the splitlvcopy command used for?
splits copies from one logical volume and creates a new and separate logical volume from them
what is the VGDA?
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.
what command will list all logical volumes on the system?
lsvg | lsvg -il
what command can be used to have a volume group automatically varied on/off during system restart?
chvg -a{y|n} VolumeGroupName
what command is used to unlock a volume group?
chvg -u VolumeGroupName