Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

Table 27-5
LVM features and VxVM equivalents (continued)
VxVM EquivalentLVM Feature
Powerfail timeout feature: After the EPOWERF error
condition disappears, the reconfiguration command must
be run manually to re-enable the paths and the disks
which were disabled due to EPOWERF error. Additional
information is available.
See the pfto feature in the vxdctl(1M) manual page.
Powerfail timeout feature: Automatically re-enable a disk
or a path to a disk, after temporary error condition
(resulting inEPOWERF error on I/Os) disappears on that
disk or path.
VxVM does not support the LVTO feature. However,
VxVM supports the powerfail timeout feature to handle
transient error conditions. By default, the use of PFTO is
disabled in the HP-UX native multi-pathing devices. In
case of DMP devices the use of PFTO is enabled. However,
you can change the PFTO settings.
See the powerfail timeout feature and the pfto feature
in the vxpfto manual pages.
Logical Volume Timeout (LVTO). If LVTO on a logical
volume is set to zero, which is the default, an I/O is retried
forever.
VxVM relocates whole subdisks. Smaller granularity
relocation is not supported. The bad block reallocation
feature does not exist in VxVM because the vectoring of
bad blocks is now done by most hardware.
Bad media block relocation.
SMH and the VEA
About SMH and the VEA
This chapter describes the Veritas Enterprise Administrator (VEA) graphical user
interface (GUI), and its relationship with the System Management Homepage
(SMH).
SMH and the VEA coexist as independent entities. The VEA recognizes and labels
LVM volumes and disks, but does not manage them. Similarly, SMH recognizes
and labels VxVM disks, but does not manage them. To manage VxVM disks
graphically, you must use the VEA.
Note: If you run the VEA client from the command line, refresh SMH to see VxVM
changes reflected in the SMH screen. Only privileged users can run the VEA client.
It is possible to launch the VEA client from SMH by selecting Home > System
Configuration > Disks and File Systems > Veritas Enterprise Administrator.
449Offline data migration
SMH and the VEA