HP D2D .HP D2D Backup System user guide (EH985-90907, March 2011) - Page 181

The HP D2D2500 Series Backup System is a RAID 5 device. It has four disks

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NFS NTP RAID Replication Storage capacity NAS target devices on an HP StoreOnce Backup System provide network file share access that is optimized for backup to disk and are referred to as NAS Shares in the Web Management Interface. All HP StoreOnce devices that are configured for NAS automatically make use of HP deduplication, ensuring efficient and cost-effective use of disk space. It is important to understand that the HP StoreOnce network share is intended to be used ONLY by backup applications that "back up to disk". Do not use the device as a drag-and-drop general file store. Network File System (NFS) is a protocol for interfacing to hosts on a Linux or UNIX network. The HP StoreOnce Backup System supports this interface for connecting to NAS targets on the HP StoreOnce appliance from a Linux or UNIX network host. Network Time Protocol (NTP) provides support for automatic time synchronization. See also Network Time Protocol (NTP) settings, page 107. RAID stands for Redundant Array of Inexpensive (or Independent) Devices, which is a data storage scheme that divides data among multiple hard drives, increasing data reliability and throughput. The HP D2D2500 Series Backup System is a RAID 5 device. It has four disks, but if one of the disks fails, no data is lost and the HP StoreOnce Backup System continues to operate correctly. The HP D2D4100/4300 Series Backup System is a RAID 6 device, which offers the best combination of data protection and capacity for disk arrays. It provides protection against double disk failures and failures while a single disk is rebuilding. HP D2D4100 and 4300 Series Backup Systems also have an online spare disk (in the appliance itself and on each expansion shelf), which further enhances the reliability of the product. If one disk fails, the online spare disk immediately takes its place. Replication is a standard term used to describe a way of synchronizing data between hardware in two physical locations. HP StoreOnce Replication allows users to replicate data from cartridges on one HP StoreOnce Backup System to mapped slots on another HP StoreOnce Backup System on a remote site or the same system. Once configured (using the simple-to-use wizard), replication occurs automatically, ensuring data is mirrored from the source to the target HP StoreOnce Backup Systems. Deduplication ensures that network traffic is minimized. See also the HP StoreOnce Backup System Concepts Guide. The physical storage capacity of the HP StoreOnce Backup System is: • HP D2D2502: 2 TB (4 x 500 GB); HP D2D2504: 4 TB (4 x 1 TB) • HP D2D4106: 6 TB (12 x 500 GB). One additional shelf may be connected to the unit, which increases the total capacity to 12 TB (24 x 500 GB). • HP D2D4112: 12 TB (12 x 1 TB). One additional shelf may be connected to the unit, which increases the total capacity to 24 TB (24 x 1 TB). • HP D2D4312: 12 TB (12 x 1 TB). Up to three additional shelves may be connected to the unit, which increases the total capacity to 48 TB (48 x 1 TB) • HP D2D4324: 24 TB (12 x 2 TB). Up to three additional shelves may be connected to the unit, which increases the total capacity to 96 TB (48 x 2 TB) Backup System user guide 181

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NAS target devices on an HP StoreOnce Backup System provide network file
share access that is optimized for backup to disk and are referred to as NAS
Shares in the Web Management Interface.
All HP StoreOnce devices that are configured for NAS automatically make use
of HP deduplication, ensuring efficient and cost-effective use of disk space.
It is important to understand that the HP StoreOnce network share is intended to
be used ONLY by backup applications that
“
back up to disk
”
. Do
not
use the
device as a drag-and-drop general file store.
NFS
Network File System (NFS) is a protocol for interfacing to hosts on a Linux or
UNIX network. The HP StoreOnce Backup System supports this interface for
connecting to NAS targets on the HP StoreOnce appliance from a Linux or UNIX
network host.
NTP
Network Time Protocol (NTP) provides support for automatic time synchronization.
See also
Network Time Protocol (NTP) settings
, page 107.
RAID
RAID stands for Redundant Array of Inexpensive (or Independent) Devices, which
is a data storage scheme that divides data among multiple hard drives, increasing
data reliability and throughput.
The HP D2D2500 Series Backup System is a RAID 5 device. It has four disks,
but if one of the disks fails, no data is lost and the HP StoreOnce Backup System
continues to operate correctly.
The HP D2D4100/4300 Series Backup System is a RAID 6 device, which offers
the best combination of data protection and capacity for disk arrays. It provides
protection against double disk failures and failures while a single disk is
rebuilding. HP D2D4100 and 4300 Series Backup Systems also have an online
spare disk (in the appliance itself and on each expansion shelf), which further
enhances the reliability of the product. If one disk fails, the online spare disk
immediately takes its place.
Replication
Replication is a standard term used to describe a way of synchronizing data
between hardware in two physical locations. HP StoreOnce Replication allows
users to replicate data from cartridges on one HP StoreOnce Backup System to
mapped slots on another HP StoreOnce Backup System on a remote site or the
same system. Once configured (using the simple-to-use wizard), replication occurs
automatically, ensuring data is mirrored from the source to the target HP
StoreOnce Backup Systems. Deduplication ensures that network traffic is
minimized. See also the
HP StoreOnce Backup System Concepts Guide
.
Storage capacity
The physical storage capacity of the HP StoreOnce Backup System is:
•
HP D2D2502: 2 TB (4 x 500 GB); HP D2D2504: 4 TB (4 x 1 TB)
•
HP D2D4106: 6 TB (12 x 500 GB). One additional shelf may be connected
to the unit, which increases the total capacity to 12 TB (24 x 500 GB).
•
HP D2D4112: 12 TB (12 x 1 TB). One additional shelf may be connected
to the unit, which increases the total capacity to 24 TB (24 x 1 TB).
•
HP D2D4312: 12 TB (12 x 1 TB). Up to three additional shelves may be
connected to the unit, which increases the total capacity to 48 TB (48 x 1
TB)
•
HP D2D4324: 24 TB (12 x 2 TB). Up to three additional shelves may be
connected to the unit, which increases the total capacity to 96 TB (48 x 2
TB)
Backup System user guide
181