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| Logical Storage Manager V5.*
is the latest release of Compaq’s volume manager to
provide highly available and customizable storage solutions
for mission critical environments. Logical Storage Manager
is an integrated, host-based disk management tool that enables
you to configure your storage to protect against data loss
and improve disk I/O performance. |
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The cost of downtime can have financially devastating
consequences for those customers who depend on mission
critical applications. Logical Storage Manager reduces
downtime using RAID technology (1, 0 + 1, and 5) to create
redundancy, reconstructs data from a failed disk, and allows
you to change your storage configuration without taking
the system down.
Mirroring (RAID 1) protects against data loss due to hardware
failure by creating a duplicate image of the data on another
physical disk. Combining mirroring and striping (RAID 0
+ 1) provides redundancy without sacrificing I/O performance.
Striping improves I/O performance by interleaving data
across several physical disks for rapid read requests.
Mirroring root and swap partitions eliminates a single
point of failure that would otherwise make your system
unusable.
RAID 5 provides data redundancy through the use of parity
that reconstructs data after a disk failure. RAID 5 logging
also prevents the corruption of recovered data by logging
new data writes before committing them to the storage array.
This way, you can replay the log to completely restore
the data on a failed disk.
Hot sparing is a new feature that relocates RAID 5 and
mirrored data on spare disks after an I/O failure. You
can designate those disks to use as spares or leave it
to the system to find free space. The administrator is
notified of the failure and identifies the failed disks.
Dirty Region Logging speeds resynchronization of volumes
by updating only those mirrored regions that changed during
the failure.
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It’s difficult to initially set up your storage configuration
that meet your needs both today and tomorrow. Reconfiguring
storage after data has been written can be time consuming
and require taking the system down, which may not be an
option in a mission critical environment.
Logical Storage Manager lets you reconfigure volumes without
interrupting user access to data and applications. Concatenate
multiple physical disks to build a single, large virtual
disk for large file systems and databases.
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| Take advantage of the benefits
of Logical Storage Manager by migrating existing Logical
Storage Manager volumes, UFS partitions, and AdvFS storage
domains to Logical Storage Manager volumes. |
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| Logical Storage Manager dynamically
configures your storage without interrupting access to your
data and applications, and protects your data without sacrificing
disk I/O performance. You can a choice of user interfaces,
from the command line, a menu interface, or a GUI. The new
GUI, Storage Administrator, visually represents your storage
configuration in the familiar tree directory structure and
uses icons to represent types of objects, operation success
or failure, and problems. You can see at-a-glance the structure
and health of your system. Handle disk setup, maintenance,
precautionary, recovery, and management tasks with a click
of the mouse and minimal text entry. |
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| Use Logical Storage Manager to
manage the storage shared by all the nodes in a cluster.
You can manage a cluster’s storage similar to how Logical
Storage Manager manages a single system’s storage --
each node knows the LSM configuration so that I/O can be
done to any LSM volume without additional /O overhead. Change
your storage configuration from any node in the cluster,
and when a node crashes, surviving nodes recover the failed
node’s Logical Storage Manager operations. |
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- Protects your data for high availability.
- Root mirroring of both the system root as well as the
cluster root ensures that no single disk failure leaves
your system or cluster unusable.
- Reconfigure your volumes online without interrupting
user and application access to critical data.
- Improve disk I/O performance and tune your storage
configuration online.
- Choice of GUI, menu, and command line user interface
makes it easy to manage your volumes.
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- Grow, shrink, reclaim, and recover your volume configuration
to suit your changing needs without interrupting user
or application access to data.
- Stripe (RAID 0) data improves disk I/O performance.
- Mirror (RAID 1) critical data for redundancy.
- Mirror and stripe (RAID 0 + 1) data for redundancy
without sacrificing performance.
- Parity (RAID 5) reconstructs data from a failed disk.
- Mirroring root and swap partitions eliminates single
point of failure.
- Concatenate multiple physical disks to build a single,
large virtual disk for large file systems and databases.
- Hot sparing relocates mirrored and RAID 5 objects to
spare disks after an I/O failure.
- Dirty Region Logging speeds resynchronization of data
by updating only those regions that changed during the
failure.
- Migrate LSM volumes, UFS partitions, and AdvFS storage
domains to Logical Storage Manager volumes.
- Supports Tru64 UNIX V5.* and TruCluster Server V5.*
- Either do a full installation or just an upgrade.
Logical Storage Manager V5.* runs on Tru64 UNIX V5.*.
For customers using Tru64 UNIX V4.0 releases, Logical
Storage Manager V4.0* provides a highly available volume
manager for their applications.
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For more information on Logical Storage Manager, please
contact your local
sales representative.
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