Veritas Volume Manager 5.0 Administrator's Guide (September 2006)

372 Administering hot-relocation
How hot-relocation works
Figure 12-1 Example of hot-relocation for a subdisk in a RAID-5 volume
Partial disk failure mail messages
If hot-relocation is enabled when a plex or disk is detached by a failure, mail indicating the
failed objects is sent to root. If a partial disk failure occurs, the mail identifies the failed
plexes. For example, if a disk containing mirrored volumes fails, you can receive mail
information as shown in the following example:
To: root
Subject: Volume Manager failures on host teal
mydg01 mydg02 mydg03 mydg04 mydg05
mydg01 mydg02 mydg03 mydg04 mydg05
mydg01-01 mydg02-01
mydg02-02
mydg03-01
mydg03-02
mydg05-01
mydg04-01
mydg01-01 mydg02-01
mydg02-02
mydg03-01
mydg03-02
mydg04-01
X
Spare Disk
mydg01 mydg02 mydg03 mydg04 mydg05
mydg05-01mydg01-01 mydg02-01
mydg02-02
mydg03-01
mydg03-02
mydg04-01
X
a) Disk group contains five disks. Two RAID-5 volumes are configured across four of the disks.
b) Subdisk mydg02-01 in one RAID-5 volume fails. Hot-relocation replaces it with subdisk mydg05
-
c) RAID-5 recovery recreates subdisk mydg02-01’s data and parity on subdisk mydg05-01 from
One spare disk is available for hot-relocation.
the data and parity information remaining on subdisks mydg01-01 and mydg03-01.
that it has created on the spare disk, and then initiates recovery of the RAID-5 volume.