TANDBERG RDX QuikStation, Руководство по эксплуатации продукта

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O
CTOBER
2011
RDX Q
UIK
S
TATION
71
C
HOOSING A
L
OGICAL
D
EVICE
T
YPE
There are many choices to look at when deciding which logical device type is
best for your data storage needs. Some questions to consider are:
 Does your back-up application support removable disk or does it support
tape only?
 Is your size of your backup job greater or less than the size of the physical
RDX cartridge? For example, if you have 1 TB RDX cartridges, will your
backup data fit on this one cartridge, or will you need to span the data across
two or more cartridges?
 Do you require multiple, simultaneous backup jobs? For example, you may
need to schedule multiple, simultaneous backup jobs to meet your backup
window requirement. Simultaneous backups also allow you to break up
your job to fit within the size of a single RDX cartridge.
 What backup application are you using? Does your backup application
support spanning across multiple removable disk targets? (Applications that
do support spanning for removable disk include Retrospect, ArcServe, and
CommVault.)
 Does your backup application include a tape library unlimited drive option,
which requires an extra license fee? With tape backups, if you require
multiple, simultaneous backup jobs, you typically need to purchase a tape
library option. If your backup application does not include a tape library
option, you can choose the RDX drive logical device configuration, which
does not require an extra license fee to perform multiple, simultaneous
backups.
Table 5-2 Choosing a logical device type
Backup
application
support
removable disk?
Backup job
greater than size
of RDX cartridge?
Need multiple,
simultaneous
backups?
Backup
application
support spanning
for removable
disk?
Unlimited tape
drive option?
(requires extra
license fee)
Choose this logical
device type:
Yes No Either Yes or No No No Eight RDX Drives
Yes Yes
a
Yes No
No No Either Yes or No No No Eight LTO-3 Tape Drives
No Yes No No Yes StorageLoader LTO
No Yes Yes No Yes T24 StorageLibrary with
two LT0-3 tape drives
No Yes Yes No Yes T40+ StorageLibary with
four LTO-3 tape drives
a
If yes, your backup application must support spanning for removable disk targets.