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WD15EARS slow write speeds

Last response: in Storage
July 29, 2010 2:07:34 PM

Hi I have just installed a WD15EARS on a new system running Windows Server 2008 R2; as far as I am aware perfectly compatible with advance format

The drive is partitioned in 2, and formatted with NTFS.
I get very fast read speeds like 125MB/s, but my write is 9.4MB/s not good.

What have I done wrong.

PS: In BIO the intel controller is running sata connection in IDE mode rather than ACHI i tried to change after installation but windows bit my hand off so I put it back. Could hat be the problem.

Thanks for any help to resolve this problem
July 29, 2010 4:23:29 PM

ok i fixed this: here how if you have this issue your self, I tried to activate ACHI post install using commonly found guide, and was able to increase write speeds to ~40MB/s fins for a desktop not cool for a server.

So I reformatted and reconfigured with ACHI on form the offset and now it nearly hits 100MS/s write.

Thanks all
a b G Storage
July 29, 2010 4:24:11 PM

I'm not sure how much it affects speed, but I would definitely reinstall in AHCI mode. (google & see if there's a way to switch).

From wiki: AHCI "exposes SATA's advanced capabilities (such as hot-plugging and native command queuing) such that host systems can utilize them."
Related resources
a b G Storage
July 29, 2010 4:24:56 PM

Looks like you were doing that as I was typing my answer! 8)
July 29, 2010 11:13:18 PM

Yeah I guess the AHCI does make a BIG difference for the EARS drives, and ther 4k sectors