ATTO Technology SC 5550E, Инструкция по установке и эксплуатации, Страница: 27 / 87

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4.0 Configure Storage into RAID Groups
The ATTO FastStream allows configuration of storage into DVRAID, JBOD, RAID Level 0, 1, 1+0, 4, 5 or 6 with
the ability to create multiple partitions.
RAID is a storage configuration which uses multiple
drives to increase capacity, performance, and/or
reliability. The FastStream can automatically set up an
application-ready RAID configuration. Also, you may
custom design a RAID configuration, or combine a
custom and an automatic configuration.
The FastStream uses all available drives when you
select
Digital Video, Audio, General IT, or
Database . Available drives include those which are
on-line and not currently configured for RAID or Hot
Spares.
If you wish to have more than one type of RAID Group
in your system, you have several options:
• Set up a customized RAID Group (refer to
Creating a custom setup on page 24), then
return to the main menu and select a particular
application to use the remainder of your
attached storage.
• Attach only the storage you want using an
automated setup (refer to Selecting an
application on page 22), then attach more
storage and use either the custom or specific
user processes outlined in this chapter.
• Set up storage now using any of the processes
in this chapter, then modify or add to storage
using the procedures listed in Modify Storage on
page 37.
CAUTION CAUTION
Before creating any RAID Group you
should initialize and verify the drives you
want in the RAID Group. Refer to
Ensure
Drive Integrity on page 15.
RAID improves data accessibility and
reliability during normal operations,
however, you still need a good backup
strategy for long-term protection of data.
When you have created RAID Groups, you may use,
monitor and modify the storage as needed. Refer to
Monitor Storage, Configurations on page 28, Modify
System Values on page 26 Manage ATTO Devices,
Configurations on page 42, and Modify Storage on
page 37.
Features you may choose
Depending on the application you choose, the number
of drives you choose and several other factors, you
may have other choices to customize your FastStream
to your particular needs.
Some features are customized by you only if you use
the custom setup. Refer to
Creating a custom setup
on page 24.
Auto-Rebuild
When Auto-Rebuild is enabled and an existing RAID
Group member becomes faulted, the appliance
initiates a rebuild using an available unallocated drive.
If no drives are available, the rebuild is initiated only
after you replace the faulted drive and initiate a system
scan to discover the drive. Hot Spares will be used
first, regardless of the Auto-Rebuild setting.
Various outcomes are available when Auto-Rebuild is
enabled.
• If an existing RAID Group member becomes
faulted or unavailable, such as when a drive is
pulled out from an array, the appliance initiates
a rebuild using an available unallocated drive.
• If an appliance boots up with drives missing or
faulted, the FastStream tries to switch them out
automatically.
• If no unallocated drive is available, you must
replace the faulted drive and a rebuild will begin.
Hot Spares are not required, allowing the
maximum number of drives for data storage.