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什麼是“ NAS”?

“網絡可尋址存儲”是網絡上任何PC,平板電腦或其他設備可用的存儲。它通常是硬盤或一組磁盤,但也可以使用固態驅動器。NAS具有自己的處理器來管理存儲。對於每個連接的設備,它看起來就像一個直接連接的存儲設備(硬盤或拇指驅動器)。

大多數Lenovo NAS系統都具有RAID功能,因此可以保護您的數據免受一個(有時甚至更多)硬盤故障的影響。

NAS和服務器之間有什麼區別?

NAS是一台服務器,但是它專注於在計算機之間共享文件,並且沒有其他服務器功能,例如電子郵件。操作系統和其他軟件是內置的,因此您只需插入NAS並以最少的設置即可運行它。

我可以在NAS上共享什麼?

NAS是一種為您的所有PC提供集中備份並在家中共享大量數據(例如照片,音樂,電影或電視節目)的好方法。在企業中,它們非常適合您的所有企業數據和視頻監控。只需將其藏在您家或企業場所的一角即可。

NAS可以使用哪種設備?

Lenovo NAS設備與Windows,Mac OS和Linux PC兼容。對於音樂,照片和視頻,Lenovo Iomega的內置媒體服務器也可以與Playstation和Xbox等遊戲機配合使用。

備份呢?

每個Lenovo NAS均包含用於自動備份網絡中每台PC和設備的軟件。

什麼是“ RAID”?這些數字代表著什麼?

RAID代表“獨立[或廉價]磁盤的冗餘陣列”。它是一組硬盤(或其他兼容存儲設備)的集合,在大多數情況下*,它們的數據散佈在整個磁盤上,因此即使一個磁盤發生故障(從技術意義上講是“冗餘”),也可以得到保護。跨多個驅動器共享數據還可以加快數據傳輸速度。

對於連接的計算機,RAID陣列看起來像一個大磁盤,儘管它可以分為多個卷。

RAID有多個“級別”,它們以不同的方式分配數據,並優先考慮速度或數據安全性。簡而言之,它們是:

RAID 0:此數據在兩個驅動器上“分條”,從而加快了數據傳輸,但沒有冗餘。如果一個驅動器發生故障,所有數據可能會丟失。

RAID 1:此“鏡像”數據到兩對或更多對驅動器。如果成對的一個驅動器發生故障,它將繼續工作。

RAID 5:最少三個磁盤,數據(和“奇偶校驗”數據)分佈在所有磁盤上。任何磁盤都可以發生故障而不會丟失數據。

RAID 6:這至少需要四個磁盤,即使兩個驅動器發生故障,也可以維護數據。

RAID 10:這是RAID 0(條帶化數據)和RAID 1(鏡像)的組合。它可以容忍每個RAID 1“跨度”中一個驅動器發生故障。

可用存儲量在RAID級別之間有所不同。只有RAID 0可以提供驅動器的總組合空間。RAID 1為您提供總數的一半。RAID 5、6和10使您介於兩者之間,具體取決於陣列中的驅動器數量。

想知道RAID 2、3和4發生了什麼?它們是較舊的實現,現在很少見。

*除“ RAID 0”外。

JBOD

“只是一堆磁盤”。陣列中的每個磁盤均獨立運行,並分別出現在您的計算機上。

什麼是“熱備用”?

規格較高的Lenovo EMC NAS系統具有備用驅動器,可以在不關閉NAS的情況下自動更換發生故障的驅動器。

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