[mythtvnz] New Hard Drive not performing well

[Ross Williamson]

 Hi Steve

 I do appreciate your informative response, even if it didn't appear so 
 from my previous hastily-written response. As mentioned the drives are 
 EACS not EARS and dmesg seems to confirm 512 byte sectors:

 [   40.755982] sd 2:0:0:0: [sda] 1953525168 512-byte hardware sectors 
 (1000205 MB)

 As for the speed,

> sync ; sync ; time ( cp ubuntu-10.04-server-amd64.iso /home/mm ;
> sync ;sync )

 I couldn't get that exact file, so I got the closest which was 
 ubuntu-10.04.1-server-amd64.iso (682MB)

 sync ; sync ; time ( cp ubuntu-10.04.1-server-amd64.iso /export/drbd3/ 
 ;sync ;sync )

 real    1m18.001s
 user    0m0.132s
 sys     0m5.292s

 Target is a RAID1 array with the aforementioned WD Green WD10EACS-00C 
 drives.

 As mentioned, this is adequate for what it is being used for but 
 nowhere near the speeds you are reporting. Speeds with NCQ on are 
 roughly 1/8th of this. I just assumed the drives were cheap and nasty.


 Ross