HP LH4r HP NetRAID-4M Installation Guide - Page 100

Command Line Interface Reference, Flexible Array, Storage Tool User, s Guide, Flexible, Command Line

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Hewlett-Packard NetRAID-4M Controller Installation Guide fails before the container has been reconstructed, all data is lost and the container is marked Dead. The actual usable data capacity of the container is equal to one less than the total number of partitions. (One partition's worth of capacity is needed to hold the parity information.) - RAID 0/1: Data is striped and mirrored on two or more pairs of partitions. If one disk in a pair fails, data is available. The actual data capacity of the container equals half the total available partition space. - RAID 50: Data is striped across a set of RAID 5 sets. See the Command Line Interface Reference or the Flexible Array Storage Tool User's Guide for more information about selecting a RAID level. 2 Type in a label for the container and press Enter. 3 The CCU automatically displays the maximum size of the container that can be created from the selected partitions. To specify a different container size, type the size and select the unit of measure (MB or GB) from the drop-down list. If the aggregate size of the selected partitions is greater than the container size you specify, the excess disk space is returned to the freespace pool for use in other containers. Note: On a Windows 2000 system, a basic-disk container is usable only if its size is greater than 16 MB; otherwise, the container type must be dynamic disk. For information about modifying the container properties of an existing container, see the Flexible Array Storage Tool User's Guide or the Command Line Interface Reference Guide. 4 Select the container stripe size. Stripe size is the amount of data written to one partition in a Stripe, RAID 5, or RAID 0/1 container before the I/O data stream switches to the next partition. The allowable stripe sizes are 8, 16, 32 (the default), and 64 KBytes. The default block size gives the best overall performance in most network server environments. 5 Specify if you want to enable read caching for the container. B-4

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B-4
Hewlett-Packard NetRAID-4M Controller Installation Guide
fails before the container has been reconstructed, all data is
lost and the container is marked
Dead
. The actual usable
data capacity of the container is equal to one less than the
total number of partitions. (One partition
’
s worth of
capacity is needed to hold the parity information.)
–
RAID 0/1
: Data is striped and mirrored on two or more
pairs of partitions. If one disk in a pair fails, data is
available. The actual data capacity of the container equals
half the total available partition space.
–
RAID 50:
Data is striped across a set of RAID 5 sets.
See the
Command Line Interface Reference
or the
Flexible Array
Storage Tool User
’
s Guide
for more information about selecting a
RAID level.
2
Type in a label for the container and press
Enter
.
3
The CCU automatically displays the maximum size of the
container that can be created from the selected partitions. To
specify a different container size, type the size and select the
unit of measure (MB or GB) from the drop-down list. If the
aggregate size of the selected partitions is greater than the
container size you specify, the excess disk space is returned to
the freespace pool for use in other containers.
Note:
On a Windows 2000 system, a basic-disk
container is usable only if its size is greater than 16
MB; otherwise, the container type must be dynamic
disk. For information about modifying the container
properties of an existing container, see the
Flexible
Array Storage Tool User
’
s Guide
or the
Command Line
Interface Reference Guide.
4
Select the container stripe size. Stripe size is the amount of data
written to one partition in a Stripe, RAID 5, or RAID 0/1
container before the I/O data stream switches to the next
partition.
The allowable stripe sizes are 8, 16, 32 (the default), and
64 KBytes. The default block size gives the best overall
performance in most network server environments.
5
Specify if you want to enable read caching for the container.