HP D2D100, Руководство пользователя

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Table 5 Device parameters (top half of the page)
Name
This is the name that is used to identify that device (library or autoloader). You may
like to enter a name that identi fi es the host or backup job with which it is associated.
Cartridges
This is the number of cartridges available on the device, which is determined by the
Emulation Type selected when the device was created.
Role
This is the role of the library, which may be non-replicating, replication source or
replication target.
Connection
If a device is shown as not connected, this indicates that the iSCSI Initiator on the
host has not logged on. For more information, see “ Targets tab ” on page 52.
Device Type
This is the emulation type used by the backup software. It is selected during
installation or when you create a device.
Port
This identi fi es the port to which the host is connected for backup and restore. The
number of ports available in the drop-down menu depends upon your network
con fi guration.
There are two LAN ports on the rear of the HP D2D. LAN port 1 must always be
connected to install the software and run the Web Management Interface. If both
ports are connected, you will be able to choose which one will be used to transfer
backup data to and from the host in the drop-down menu. If only one port is
connected, there will be only one LAN port choice (port 1).
Emulation types for tape devices
HP D2D products emulate a range of physical tape devices, these are either Tape Autoloaders or Tape
Libraries. Supported emulation types are listed below:
• HP 1x8 G2 Autoloader: This is a single Ultrium tape drive autoloader with a maximum of 24 cartridge
slots. It should be used for simple rotation schemes where a single backup job is to run at a time.
This emulation type is widely supported by backup applications.
• HP MSL2024 Library: This is a tape library device with one embedded Ultrium tape drive and a
maximum of 24 cartridge slots. This emulation type is widely supported by backup applications.
• HP MSL4048 Library: This is a tape library device with one embedded Ultrium tape drive and a
maximum of 48 cartridge slots. It should be used when implementing rotation schemes that use a
large number of cartridges devices. This emulation type is widely supported by backup applications.
• HP D2DBS Library: This is a tape library device with one embedded Ultrium tape drive and 48
cartridge slots. If it is supported by your backup application, this is the preferred emulation type to be
used because it does not emulate any physical library types in existence and is, therefore, clearly
identi fi able as a D2D device. It is the most fl exible emulation type available; however, backup
application support varies by software vendor.
NOTE:
Symantec prefer their customers to use this emulation type with BackupExec and Netbackup.
Libraries, slots and storage capacity
Each slot con fi gured commits 3 GB of physical disk space, regardless of what value has been con fi gured
for the maximum cartridge size. This ensures that there is always suf fi cient space to fl ush buffers and there
is never data in memory that cannot be written to cartridge. The remainder of the con fi gured maximum
capacity is used only as needed, but the initial 3 GB is permanently committed. Therefore, only con fi gure
the number of slots that you actually require. If you con fi gure a MSL G3 Series (2x24) with 24 cartridges,
you should be aware that you have committed 72 GB of disk space — even when no data is written.
Only do this, if you are sure all slots will be used.
D2D Backup System HP D2D2503
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