Users Guide

メモ: Lifecycle Controller を使用して作成できる仮想ディスクは 1 つのみです。複数の仮想ディスクを作成するには、オプシ
ョン ROM を使用します。オプション ROM にアクセスするには、起動中または POST 中に <Ctrl> <R> を押します。
RAID コントローラの選択
［View Current RAID Configuration and Select Controller（現在の RAID 設定の表示とコントローラの選択）］ ページには、システムに
接続されているサポート対象 RAID コントローラがすべて表示されます。仮想ディスクを作成する RAID コントローラを選択して、
［Next（次へ）］ をクリックします。
Selecting RAID levels
Select a RAID Level for the virtual disk:
● RAID 0 — Stripes data across the physical disks. RAID 0 does not maintain redundant data. When a physical disk fails in a RAID 0
virtual disk, there is no method for rebuilding the data. RAID 0 offers good read and write performance with zero data redundancy.
● RAID 1 — Mirrors or duplicates data from one physical disk to another. If a physical disk fails, data can be rebuilt using the data from
the other side of the mirror. RAID 1 offers good read performance and average write performance with good data redundancy.
● RAID 5 — Stripes data across the physical disks, and uses parity information to maintain redundant data. If a physical disk fails, the
data can be rebuilt using the parity information. RAID 5 offers good read performance and slower write performance with good data
redundancy.
● RAID 6 — Stripes data across the physical disks, and uses two sets of parity information for additional data redundancy. If one or two
physical disks fail, the data can be rebuilt using the parity information. RAID 6 offers good data redundancy and read performance but
slower write performance.
● RAID 10 — Combines mirrored physical disks with data striping. If a physical disk fails, data can be rebuilt using the mirrored data. RAID
10 offers good read and write performance with good data redundancy.
● RAID 50 — A dual-level array that uses multiple RAID 5 sets in a single array. A single physical disk failure can occur in each of the
RAID 5 without any loss of data on the entire array. Although the RAID 50 has increased write performance, its performance
decreases, data or program access gets slower, and transfer speeds on the array are affected when a physical disk fails and
reconstruction takes place.
● RAID 60 — Combines the straight block level striping of RAID 0 with the distributed double parity of RAID 6. The system must have at
least eight physical disks to use RAID 60. Failures while a single physical disk is rebuilding in one RAID 60 set do not lead to data loss.
RAID 60 has improved fault tolerance because more than two physical disks on either span must fail for data loss to occur.
NOTE: Depending on the type of controllers, some RAID levels are not supported.
異なる RAID レベルの最小ディスク要件：
表 11. RAID レベルとディスク数
RAID レベル 最小ディスク数
0 1*
1 2
5 3
6 4
10 4
50 6
60 8
*PERC S140/S150 RAID コントローラーには、少なくとも 2 台のハード ディスク ドライブが必要です。
Configure 43