VERITAS Volume Manager 3.1 Administrator's Guide

Recovery
Detecting and Replacing Failed Disks
Chapter 8350
# vxrelocd root
user_name1 user_name2
&
To reduce the impact of recovery on system performance, you can
instruct the vxrelocd process to increase the delay between the
recovery of each region of the volume using the following command:
# vxrelocd -o slow[=
IOdelay
] root &
where the optional
IOdelay
indicates the desired delay (in
milliseconds). The default value for the delay is 250 milliseconds. See
the vxrelocd(1M) manual page for more information.
Displaying Spare Disk Information
Use the vxdg command spare to display information about all of the
spare disks available for relocation. The output displays the following
information:
GROUP DISK DEVICE TAG OFFSET LENGTH FLAGS
rootdg disk02 c0t2d0 c0t2d0 0 658007 s
In this example, disk02 is the only disk designated as a spare. The
LENGTH field indicates how much spare space is currently available on
this disk for relocation.
To display information about disks that are currently designated as
spares, use the following commands:
vxdisk list—lists disk information and displays spare disks with a
SPARE flag.
vxprint—lists disk and other information and displays spare disks
with a SPARE flag.
Moving Relocated Subdisks
When hot-relocation occurs, subdisks are relocated to spare disks and/or
available free space within the disk group. The new subdisk locations
may not provide the same performance or data layout that existed before
hot-relocation took place. To improve performance, move the relocated
subdisks (after hot-relocation is complete).
You can also move the relocated subdisks off the spare disk(s) to keep the
spare disk space free for future hot-relocation needs. Another reason for
moving subdisks is to recreate the configuration that existed before
hot-relocation occurred.
During hot-relocation, an email messages is sent to root, as shown in