sp4148

raid 6 has too poor performance

Jedia

回復 9# iapple

建RAID 6，不如建一個RAID 5+ Hotspare，同樣有兩顆硬碟的備用保護。但若哪天容量不夠了，可以把Hotspare的那顆從Hotspare移除，做為擴充RAID 5到四顆的硬碟。

man3564

RAID 6 提供更周全的資料防護機制。藉由同位元資料 (Parity) 的形式,將相當於兩顆硬碟的容量拿來儲存冗餘訊 ...
iapple 發表於 2012-4-7 13:09

rebuild 快D only??

Computer_Slave

I used RAID 10 before and I switch to RAID 5 + Hotspare now.  Both the reading and writing response in RAID 5 seems slower than RAID 10's, although some testings reveals that RAID 10's writing should be 50% faster than RAID 5's and RAID 5's reading is 20% faster than RAID 10's.