Dell OpenManage Server Administrator Managed Node for Fluid Cache for DAS Uživatelský manuál stáhnout pdf (Strana 38)

100

101

38 Understanding RAID Concepts

When a physical disk in a concatenated or spanned volume fails, the entire

volume becomes unavailable. Because the data is not redundant, it cannot be

restored by rebuilding from a mirrored disk or parity information. Restoring

from a backup is the only option.

Because concatenated volumes do not use disk space to maintain redundant

data, they are more cost-efficient than volumes that use mirrors or parity

information. A concatenated volume may be a good choice for data that is

temporary, easily reproduced, or that does not justify the cost of data

redundancy. In addition, a concatenated volume can easily be expanded by

adding an additional physical disk.

Figure 3-1. Concatenating Disks

• Concatenates

disks as one large virtual disk with a capacity of

disks.

• Data fills up the first disk before it is written to the second disk.

• No redundancy data is kept. When a disk fails, the large virtual disk fails.

• No performance gain.

• No redundancy.

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 389 390

Komentáře k této Příručce

Žádné komentáře

Dell OpenManage Server Administrator Managed Node for Fluid Cache for DAS Uživatelský manuál Strana 38

Komentáře k této Příručce

Související produkty a manuály pro Základní desky serveru / pracovní stanice Dell OpenManage Server Administrator Managed Node for Fluid Cache for DAS