One catch not always mentioned is while the drives are auto sensing
(1.5 vs 3.0) sometimes the chipsets are not auto sensing. VIA (may
they burn in heck for having super cool smb factor systems but
hideous chipsets) chipsets on the epia style board and perhaps others
from them require you to manually instruct the hard drive to use only
1.5 Gbits mode. Usually this requires a super small jumper or a
regular jumper on the hard drive itself. In addition there are some
drives from seagate 7200.9 I think whose firmware also makes via
systems headaches.
On May 21, 2007, at 3:15 PM, Cress, Loren ((LLU)) wrote:
http://en.wikipedia.org/wiki/Serial_ATA#SATA_3.0_Gbit.2Fs
"[...] a 3 Gbit/s signaling rate was added to the Physical layer
(PHY layer), effectively doubling data throughput from 150 MB/s to
300 MB/s."
By my calculations, that should come out to about 2 1/4 minutes for
a 40 GB file.
and
"Backward compatibility between SATA 1.5 Gbit/s controllers and
SATA 3.0 Gbit/s devices was important, so SATA/300's
autonegotiation sequence is designed to fallback to SATA/150 speed
(1.5 Gbit/s rate) when in communication with such devices. In
practice, some older SATA controllers do not properly implement
SATA speed negotiation. Affected systems require user-intervention
to manually set the SATA 3.0 Gbit/s peripherals to 1.5 Gbit/s mode,
generally through the use of a jumper."
Are you piping this through gzip or some other kind of process like
that?
-----Original Message-----
From: [email protected] on behalf of Roger E. Rustad, Jr.
Sent: Mon 21-May-07 15:03
To: 909linux.org general mailing list
Subject: Re: [909linux] minimized partition image
Does anybody know how long it takes for SATA drives to transfer data?
It's taken almost 3 hours to transfer about a 40GB Exchange private
DB, and I'm wondering if there is a problem or if it's a problem
related to the previous error.
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