RAID1還是RAID5好,苦惱中 - 儲存設備

By Jacob
at 2014-04-16T14:37
at 2014-04-16T14:37
Table of Contents
最近想買一台外接硬碟盒來儲存文件、照片和影片等重要資料
因為拿來備份兩份資料,不會使用 RAID0 模式
RAID10(1+0)要四顆硬碟,可能超出成本
目前針對 RAID5 和 RAID1 做比較
網路上得知 RAID5 至少要三顆硬碟,容量只有n-1,如三顆20GB硬碟,總容量就是40GB
只要一顆硬碟故障,把故障硬碟換掉換上一顆新的,再利用舊的硬碟運用資料演算將
資料取回來,但不知道救援檔案的成功率高嗎?
而且看文章說壞掉兩顆以上就無救了(!?)
RAID1 就是單純鏡像備份(Mirror),如果其中一顆故障
只要把故障的抽取出來,另一顆硬碟檔案仍然完整無缺
且兩顆硬碟即可建立 RAID1
不知道哪種比較適合我,有點苦惱欸 ...
順道問,假設故障後更換新硬碟取代原先故障的硬碟,要如何重新和沒有故障的硬碟建立
RAID1、RAID5 呢,也就是把無故障硬碟的再一次資料備份到新硬碟上呢,繼續進行備份
?
因為目前對 RAID 還在剛接觸的階段,如果有錯誤或誤解之處,盼各位更正與指教
附註:
這台價格低,不過似乎不支援 RAID5
http://goo.gl/hul1tV
這台雖然滿貴的,但網路評價滿高的,操作比較簡便,但也沒有 RAID5
http://goo.gl/Nr0kST
這台支援RAID 0, 1, 3, 5, 10 模式
http://goo.gl/mv1gLF
--
Tags:
儲存設備
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