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So I recently bought a Rosewill cage, RSV-SATA-CAGE-34, and was going to use the same write cached issue drive as a backup drive, unassigned. I thought at least I could archive on it rather than it just sitting around. While doing a preclear to make sure the drive was still working I noticed that the drive was over 100 MB/s on the preclear. I did an erase and preclear and the drive averaged 145 MB/s. So I put it back in the array as a second parity drive. It seems to be running at a good speed. The plugin Fix Common Problems does give me this warning... I verified again that write-cache is not on. Write Cache is disabled on parity2

I think I was getting like 35-40 out of it in Parity. Actually I can't remember anymore but I know it was slower than any other disk I had on there which is why I started looking into it.

I wonder if that is my case. I still have the drive and it works perfectly well. Just can't get it to go above 75 mb/s.

I was able to use the drive via Windows however I had to check the write-caching policy, check it or uncheck it. Can't remember now. But that was the only way to get the full write speed of the drive. This is the first time I've ever had to do that with a drive. So maybe its a drive issue?

It was on my LSI controller. Moved it from there to the motherboard SATA connection. Nothing...

Motherboard: BIOSTAR A68N-5600

No error. I run the following.... hdparm -W1 /dev/sdb /dev/sdb: setting drive write-caching to 1 (on) write-caching = 0 (off) Check... Still off hdparm -W /dev/sdb /dev/sdb: write-caching = 0 (off)

I found that one of the drives in my array is slow. I looked up some information on write cache and found that on this drive its disabled. The drive is HGST_HUS726060ALA640 6TB. I've tried some different things to turn on write cache but can't seem to get it to work. Any suggestions? sdparm -g WCE /dev/sdb /dev/sdb: ATA HGST HUS726060AL T1EN WCE 0 [cha: y] Tried this... sdparm --set=WCE /dev/sdb and this... hdparm -W1 /dev/sdb