[GRLUG] External drive transfer rates

[Michael Mol]

I saw this tool mentioned on KernelTrap a week or so ago.  It's like
hdparm, but for SCSI devices (Including the SCSI generic layer):

http://sg.torque.net/sg/sdparm.html

On 11/6/07, Bob Kline <bob.kline at gmail.com> wrote:
>
>
>
>
> On Nov 6, 2007 4:35 PM, Justin Denick <justin.denick at gmail.com> wrote:
> >
> >
> >
> >
> >
> >
> > On 11/6/07, Bob Kline <bob.kline at gmail.com> wrote:
> > > Both the internal drive and the
> > > one hanging off the USB 2 cable
> > > are IDE.
> > >
> > > When I run the backup,  the
> > > machine is doing little else, so I'd
> > > guess the CPU is not particularly
> > > loaded.
> > >
> > > I'm a little puzzled as to why the
> > > hdparm  "d" parameter does not
> > > function,  but  the write says hdparm
> > > does not work with all chip sets.
> >
>
>
>
> I tried setting DMA on one of my IDE drives connected via usb
> and I got the same error message.
> The kernel doesn't see it as a PATA drive but rather SATA.
>
>
>
> As I mentioned of the  options  c, u, d,  and  a,
> hdparm  only reports anything  for a.   Either
> there are a lot of unsupported chip sets out
> there,  as the man page writeup suggests,  or
> hdparm needs work.
>
> Anyway,  for now I'll just set my backups
> to run overnight and consider the rest of it
> an unresolved problem for now.  I gather
>  not too many people are doing what I'm
> doing here - using a drive at the end of a
> USB 2 port.
>
> I wonder whether FireWire works any better?
>
>
>      -Bob
>
>
>
>
>
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:wq