Compaq Infortrend Manuale Utente

The logical volume can not have any logical drive stated as "fatal
failed.”  If there is any failed drive in any of its member logical
drives, controller will start to rebuild that logical drive.  Should any
of the member logical drives fail fatally, the logical volume fails
fatally and data will not be accessible.

To avoid a logical volume failure:

Logical drives as members to a logical volume should be
configured in RAID levels that provide redundancy - RAID
levels 1 (0+1), 3, or 5.

Rebuild the logical drive as soon as possible whenever a drive
failure occurs.  Use of local spares is recommended.

A logical drive should be composed of physical drives from
different drive channels.  Compose the logical drive with drives
from different drive channels to avoid the fatal loss of data
caused by bus failure.

Once a logical drive has been divided into partitions, the logical
drive can no longer be used as a member of a logical volume.  The
members of a logical volume should have one partition only with
the entire capacity.

If you want to use a partitioned logical drive for a logical volume,
delete the other partitions in this logical drive until there remains
one partition only with the entire capacity.  Mind that deleting the
partition of the logical drive will also destroy all data.  Data should
be backed up before making partition configuration.

When a logical drive is used as a member to a logical volume, this
logical drive can no longer be partitioned in “View and Edit Logical
Drives.”  Instead, the Logical Volume can be partitioned into 8 in
“View and Edit Logical Volume.”

The procedure for partitioning a logical volume is the same as that
for partitioning a logical drive.  After the logical volume has been
partitioned, map each partition to a host ID/LUN to make the
partitions available as individual drives.