Disk Devices; File System Types; Instant Restore; Logical Volumes And Volume Groups - HP 418800-B21 - StorageWorks Modular Smart Array 70 Storage Enclosure User Manual

Disk Devices

The replication manager uses the term host disk device to refer a host's identification of storage
devices. With SAN-based storage resources, for each virtual disk that is presented to a host, there is a
corresponding entry (identification) in a host's low-level devices table. The replication manager discovers
these devices on enabled hosts and displays them in the Disk Devices tab on the Host Volumes content
host volume views
pane. See

File system types

The file system property indicates whether a host volume is formatted with a file system or not.
Examples of file system types:
AdvFS. Tru64 UNIX
ufs. AIX, HP-UX, Linux, Solaris, Tru64 UNIX
vxfs. HP-UX
NTFS. Windows
Files-1 1, ODS-2, ODS-5. OpenVMS
If a host volume is not formatted with a file system, the property displays raw disk information. See
host volumes

Instant Restore

The instant restore feature allows you to restore data on a host volume or host volume group with data
from one of its previously created replicas (snapclone or snapshot). The operation is instant because the
restored data is available within seconds for host I/O (the actual data transfer occurs in the background).
For example, assume that the database named sales_db becomes corrupt. You can instantly restore it to
a prior state from one of its replicas.
sales_db
volume being restored

Logical volumes and volume groups

Some enabled hosts use a logical volume manager (LVM) to organize storage into volume groups and
logical volumes. The replication manager discovers host volumes on enabled hosts if the volumes were
created with a supported OS and LVM.
The following description uses general terms that may differ from the terminology used in a specific
OS and LVM. See also
Volume groups
A host-based volume group is a named pool of storage that the host's LVM can access. When the
underlying physical storage is on an HP StorageWorks storage system, you can use the replication
manager to interact with a volume group. A volume group is not considered to be a component with
which hosts can perform I/O.
Logical volumes
An LVM organizes a host's volume group into smaller portions called logical volumes. When the
underlying physical storage is on an HP StorageWorks storage system, you can use the replication
manager to interact with a logical volume.
and viewing host
raw disks.
<======
Tru64 UNIX host
volumes.
RR-20070523...
replica to restore from
volumes.
HP StorageWorks Replication Solutions Manager 4.0.1
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