Re: Awful hard drive performance
- From: stan@xxxxxxxxxxxxxxxxxx
- Date: 31 Jul 2008 16:02:08 GMT
James H. Newman <NewJames@xxxxxxxxxxx> wrote:
The problem is, when I try to enable DMA on these drives by means
of hdparm -d, using_dma remains off. Anybody can offer an explanation as
to why? I understand this must be turned on in order to have decent disk
performance. In fact, I noticed that when transferring big files from this
box to other boxes in my LAN via SCP, instead of attaining the roughly
8-10 MBs expected, the transfer rate never goes above 2.3 MBs. I wonder
if this is the reason why?
Well- since you are measuring a whole bunch more than disk access speed,
you first need to find out where the bottleneck is.
I'd suggest starting by looking at transfer speed from one
of your disks to another ON THE SAME COMPUTER. If that's nice
and fast then clearly your issue above is network related
and not disk access related.
What leads you to expect 8-10MB/s for this transfer?
Stan
--
Stan Bischof ("stan" at the below domain)
www.worldbadminton.com
.
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