APC Snap Server 2200 User Manual download pdf (Page 25)

Changing the Disk Configuration

Chapter 3 Customizing Your Snap Server 19

Changing the Disk Configuration

Your Snap Server’s disk configuration was preset at the factory, and the default disk

settings depend on the Snap Server.

Tip Make changes to the disk configuration before you store any files on the server.

Changing the configuration will erase all data stored on the disk drives.

• Snap Server 2200 — By default, the two disk drives on a Snap Server 2200 are

combined into a single larger disk (or disk array). This configuration is called disk

striping or RAID 0. When you connect to the server, you see a single disk. This

configuration provides the best performance, but does not protect your data from

disk failure.

You may want to configure your disks differently:

• You can configure each disk as an individual unit, which network users can

access as an independent storage device (JBOD).

• To protect your data from disk failure, you can use one disk to duplicate the

data stored on the other disk. This configuration is called disk mirroring or RAID 1.

In this configuration, if a disk fails, the remaining disk automatically takes over

and the server continues operating without interruption or loss of data.

• Snap Server 4100 — By default, the four disk drives on a Snap Server 4100 are

combined into one large, data-protected disk. This configuration is called RAID 5.

The total capacity of the combined disks (known as a disk array) is equivalent to

the capacity of three individual disks. The remaining disk space is used for data

protection. If any single disk in the array fails, the array automatically recovers

from the failure and the server continues operating without interruption or data

loss.

According to your needs, you may want to configure your Snap Server disks

differently:

• You can configure each disk as an individual unit, which network users can

access as an independent storage device (JBOD).

• You can combine any two to four disks to make a single larger disk that has no

data protection. This configuration is called disk striping, or RAID 0. Disk

striping is best suited for applications where maximum performance and

highest capacity are more important than data protection.

• You can combine any two disks, using one disk to duplicate the data stored on

the other. This configuration is called disk mirroring, or RAID 1. If either disk in the

configuration fails, the other automatically takes over; the server continues

operating without interruption or data loss. Disk mirroring sacrifices disk

capacity, which is reduced by half, to provide a high level of data protection.

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APC Snap Server 2200 User Manual Page 25