Dell EMC Unity: Introduction to the Platform Page11 The first four drives of the DPE are known as system drives, and contain data used by the operating environment. While they can be used in pools to hold user data, the entire formatted capacity of the system drives is not available since space is reserved for the system. These drives should not be moved within the DPE or relocated to another enclosure and should be replaced immediately in the event of a fault. A system drive cannot be used as a hot spare for a non-system drive. For this reason, the minimum number of drives in a system is 5, with system drives configured in a RAID 1/0 (1+1 or 2+2) configuration with a non-system-drive hot spare.
ayas
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2025年12月24日 03:58
Keijirouさん
Unity380の先頭4本のシステムドライブですが、こちらのRAID構成や冗長性は非公開情報でしょうか。
→公開情報としてあるシステムドライブのRAID構成はRAID 1/0です。内部領域の構成などの詳細情報は非公開情報になっています。
Dell EMC Unity: Introduction to the Platform
Page11
The first four drives of the DPE are known as system drives, and contain data used by the operating environment. While they can be used in pools to hold user data, the entire formatted capacity of the system drives is not available since space is reserved for the system. These drives should not be moved within the DPE or relocated to another enclosure and should be replaced immediately in the event of a fault. A system drive cannot be used as a hot spare for a non-system drive. For this reason, the minimum number of drives in a system is 5, with system drives configured in a RAID 1/0 (1+1 or 2+2) configuration with a non-system-drive hot spare.
【Unity】Unconfigured Diskについて
システムディスクは4本を利用してお互いにSPAとSPBの情報をミラーして持っていたり、情報にによってはトリプルミラーしていたりするので、1本フォルトしてもそのまま残りの3本で問題なく動作を続けます。そしてフォルトしたディスクを交換すると残った3本のディスクから交換された新しいディスクにデータのコピーを行い通常動作に戻るという動きをします