硬碟讀取速度一問 - 筆電

廠牌:ASUS

型號:X550VB

購入日期:2013/06

距上次使用正常時間:今天

OS版本:WIN8

平常作業內容:CHROME、CAE

有無內建還原功能(Y/N):Y

問題內容:

前陣子換了固態硬碟，然後把原廠硬碟換到SATA2的光碟機位置

現在電腦分成三個槽 C(SSD) D(HDD)(原硬碟C槽) E(HDD)(原硬碟D槽)

然後用了CrystalDiskMark掃讀取和寫入的速度發現同一顆硬碟DE兩個槽的速度居然差

異不小...這樣是正常的嗎? 理論上同一顆硬碟不是應該讀取跟寫入會很接近嗎?

怎麼會這樣呢?? 還有我用這軟體掃了幾次結果都差不多，應該不會是誤差

下面附上三個槽的讀寫數據，依照CDE依序往下排


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* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 508.031 MB/s
Sequential Write : 157.349 MB/s
Random Read 512KB : 335.265 MB/s
Random Write 512KB : 158.059 MB/s
Random Read 4KB (QD=1) : 24.252 MB/s [ 5921.0 IOPS]
Random Write 4KB (QD=1) : 47.589 MB/s [ 11618.5 IOPS]
Random Read 4KB (QD=32) : 266.063 MB/s [ 64956.8 IOPS]
Random Write 4KB (QD=32) : 157.856 MB/s [ 38539.0 IOPS]

Test : 1000 MB [C: 40.6% (38.2/94.1 GB)] (x5)
Date : 2015/04/19 16:29:08
OS : Windows 8 [6.2 Build 9200] (x64)



-----------------------------------------------------------------------

-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 89.203 MB/s
Sequential Write : 88.049 MB/s
Random Read 512KB : 31.146 MB/s
Random Write 512KB : 34.677 MB/s
Random Read 4KB (QD=1) : 0.373 MB/s [ 91.0 IOPS]
Random Write 4KB (QD=1) : 0.998 MB/s [ 243.5 IOPS]
Random Read 4KB (QD=32) : 0.909 MB/s [ 222.0 IOPS]
Random Write 4KB (QD=32) : 0.989 MB/s [ 241.5 IOPS]

Test : 1000 MB [D: 76.3% (107.3/140.7 GB)] (x5)
Date : 2015/04/19 17:04:09
OS : Windows 8 [6.2 Build 9200] (x64)


-----------------------------------------------------------------------
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 75.923 MB/s
Sequential Write : 74.616 MB/s
Random Read 512KB : 26.136 MB/s
Random Write 512KB : 29.869 MB/s
Random Read 4KB (QD=1) : 0.334 MB/s [ 81.5 IOPS]
Random Write 4KB (QD=1) : 0.824 MB/s [ 201.2 IOPS]
Random Read 4KB (QD=32) : 0.755 MB/s [ 184.2 IOPS]
Random Write 4KB (QD=32) : 0.838 MB/s [ 204.7 IOPS]

Test : 1000 MB [E: 38.9% (208.6/536.6 GB)] (x5)
Date : 2015/04/19 16:39:13
OS : Windows 8 [6.2 Build 9200] (x64)



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