[raid 卡] 求救!! LSI MegaRAID RAID 5 速度插水問題

NetSoul

本身用緊9267-8i(NEC OEM)行RAID 5 用2.5Gbe LAN card一直好地地。早排張RAID card死咗換返張同model嘅上機，但係copy file嗰陣只係頭幾秒去到280MB/s之後直插落2xMB/s。無論係經LAN或internal SSD抄file去RAID 5都係一樣。

1) 試過OS 裝 Windows 11, Windows Server 2019, 2022 update 埋driver都係一樣
2) Update 咗 Firmware 都係一樣
3) 換過3張9267-8i都係一樣
4) 換過唔同嘅Motherboard同埋CPU都係一樣

係咪有咩我miss咗?求各師兄指教

yeeyee2004

我覺得用raid card行raid5太麻煩又唔係快除左增加容量外睇唔到有乜好處又多隻香爐多隻鬼我以前都係用raid card而家都費事用

NetSoul

我覺得用raid card行raid5太麻煩又唔係快除左增加容量外睇唔到有乜好處又多隻香爐多隻鬼我以前都係用raid c ...
yeeyee2004 發表於 2021-12-26 14:16

RAID 5 為咗安心啲，RAID卡為咗rebuild快啲

yeeyee2004

回覆 3# NetSoul rebuild 就算raid card一樣想死安心用software raid 0或sync一樣得

yip_kc

using write back? or write through ?

KinChungE

write back定write through?
插左BBU未?

NetSoul

using write back? or write through ?
yip_kc 發表於 2021-12-26 21:47

write back定write through?
插左BBU未?
KinChungE 發表於 2021-12-26 22:13

無BBU亦無得set Write Back，只有Write Through。但係之前都係咁用一直相安無事，所以好奇怪

KinChungE

無BBU亦無得set Write Back，只有Write Through。但係之前都係咁用一直相安無事，所以好奇怪 ...
NetSoul 發表於 2021-12-27 15:54

冇BBU可以set forced write-back
另外, 留意下read ahead開左定熄左

NetSoul

冇BBU可以set forced write-back
另外, 留意下read ahead開左定熄左
KinChungE 發表於 2021-12-27 16:25

多謝師兄回覆，張卡只有Write Through一個option。Read ahead就選咗Aways read ahead

KinChungE

多謝師兄回覆，張卡只有Write Through一個option。Read ahead就選咗Aways read ahead
NetSoul 發表於 2021-12-27 21:04

試下改做no read ahead
另外留意會唔會做緊patrol read / rebuild