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標題: [硬件] RAID 0, RAID 5, RAID 0+1? [打印本頁]

作者: BeleBala 時間: 2007-2-5 19:11 標題: RAID 0, RAID 5, RAID 0+1?

用四隻 peak transfer rate : 70MB/s ge HDD
假設行 RAID 0 = 4x70MB/s = 280MB/s peak
RAID 0+1 = 140MB/s peak

(((我知道冇可能真係幾個個 HDD 就乘幾多...but anyway...to make it easier to understand = =)))

咁 RAID 5 係咪 210MB/s peak? (by using above "theory")
同埋 RAID 5 ge seek time 係咪比較 RAID 0 短的?

我有冇理解錯?
原諒我咁白痴...

作者: BeleBala 時間: 2007-2-5 21:16

仲有...
RAID 5 的 HDD 係咪一定要 Identical?
咁如果我想換 HDD 點算?? .__.

RAID 0+1 可唔可以換兩隻新 HDD 落去做 rebuild?
Original : 320GB x4 @ RAID 0+1
後來 : 320GB x2 @ RAID 0 + 500GB x2 @ RAID 1
再換 : 500GB x4 RAID 0+1

會唔會少左 180GB?
或者可以點解決?
Backup -> 重裝? .__.

作者: XT 時間: 2007-2-5 23:06

Raid 5 280Mb/s ... Ｄ資料散晒去讀 ... (依然你果套理論

)

#2 果 d ... 唔記得 ,搵其他人答啦 ...

作者: qcmadness 時間: 2007-2-6 00:45

引用:

Originally posted by BeleBala at 2007-2-5 19:11:
用四隻 peak transfer rate : 70MB/s ge HDD
假設行 RAID 0 = 4x70MB/s = 280MB/s peak
RAID 0+1 = 140MB/s peak

(((我知道冇可能真係幾個個 HDD 就乘幾多...but anyway...to make it easier to understand ...

咁多問題, 最多逐條答

理論上raid 5都好快, 但係個XOR processor做唔做到咁快係1個問題...

作者: BeleBala 時間: 2007-2-7 00:05

引用:

Originally posted by qcmadness at 6/2/2007 00:45:

咁多問題, 最多逐條答

理論上raid 5都好快, 但係個XOR processor做唔做到咁快係1個問題...

咁即係最好 = RAID 0+1?

作者: qcmadness 時間: 2007-2-7 01:09

引用:

Originally posted by BeleBala at 2007-2-7 00:05:

咁即係最好 = RAID 0+1?

Raid 0+1個可用空間少嘛......
同埋無記錯, random read raid 5都幾好...

作者: 小童 時間: 2007-5-24 04:20

引用:

Originally posted by BeleBala at 2007-2-7 00:05:

咁即係最好 = RAID 0+1?

係Raid 5+0 / 6+0

作者: 小童 時間: 2007-5-24 04:24

引用:

Originally posted by qcmadness at 2007-2-6 00:45:

咁多問題, 最多逐條答

理論上raid 5都好快, 但係個XOR processor做唔做到咁快係1個問題...

3ware 9650SE 用SATA2 Seagate ES 320gb x 4行Raid5而家可以接近Raid 0速度

HenryHH@EPC

http://www.hkepc.com/bbs/viewthr ... mp;highlight=9650se

[ Last edited by 小童 on 2007-5-24 at 04:26 ]

作者: qcmadness 時間: 2007-6-1 19:37

引用:

Originally posted by 小童 at 2007-5-24 04:24:

3ware 9650SE 用SATA2 Seagate ES 320gb x 4行Raid5而家可以接近Raid 0速度

HenryHH@EPC

http://www.hkepc.com/bbs/viewthr ... mp;highlight=9650se

[[i ...

用咩I/O processor?

作者: GeN~XP 時間: 2007-6-2 01:49

引用:

Originally posted by qcmadness at 2007-6-1 19:37:

用咩I/O processor?

唔清楚...不過你可以看看這個website

http://www.upmost.com.tw/asp/2index3.asp?pid=3WR309654MK33#規格

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