So for a few months now, Ive been having speed issues while writing to the array. Moving from SMB to NFS made things a little better (so it seemed) but now its just as bad. I decided to do a few tests over the network with 'dd'.

 

I found that I could write to a share of mine which DOESNT use the cache drive, faster than a share that DOES use the cache drive. I thought this to be rather odd.

 

I ssh'd into my server, and tried hdparm -Tt on a drive from my array (sda), and then my cache drive (sdh). The results are below:

 

hdparm -Tt /dev/sda

 

/dev/sda:

Timing cached reads:  1618 MB in  2.00 seconds = 809.34 MB/sec

Timing buffered disk reads:  44 MB in  3.03 seconds =  14.54 MB/sec

 

hdparm -Tt /dev/sdh

 

/dev/sdh:

Timing cached reads:    2 MB in  2.01 seconds = 1019.94 kB/sec

Timing buffered disk reads:  4 MB in  4.12 seconds = 994.20 kB/sec

 

 

Does this indicate what I think it does? That my cache drive has something seriously wrong with it?

Any clues would be handy..

 

Thanks,

wishie

 

Post a SMART report.