Re: SATA READ_DMA timeouts - SOLVED?

2008-09-30 Thread Wojciech Puchar
Some people have reported that when "UDMA33" is shown with SATA disks, that it's purely cosmetical -- that is to say, the actual transfer speed can exceed 33MByte/sec. A series of "dd" tests reading/writing to the yes it can, but it's much slower than native SATA, at least on system where i te

Re: SATA READ_DMA timeouts - SOLVED?

2008-09-30 Thread Jeremy Chadwick
On Tue, Sep 30, 2008 at 07:29:26PM +0200, Mel wrote: > On Tuesday 30 September 2008 18:54:12 Reid Linnemann wrote: > > Jeremy Chadwick wrote: > > > (I'm not subscribed to freebsd-questions, so please CC me on replies. > > > I'm also not sure how I ended up getting this mail in the first place; > >

Re: SATA READ_DMA timeouts - SOLVED?

2008-09-30 Thread Mel
On Tuesday 30 September 2008 18:54:12 Reid Linnemann wrote: > Jeremy Chadwick wrote: > > (I'm not subscribed to freebsd-questions, so please CC me on replies. > > I'm also not sure how I ended up getting this mail in the first place; > > it looks like someone BCC'd my [EMAIL PROTECTED] address). >

Re: SATA READ_DMA timeouts - SOLVED?

2008-09-30 Thread Reid Linnemann
Jeremy Chadwick wrote: (I'm not subscribed to freebsd-questions, so please CC me on replies. I'm also not sure how I ended up getting this mail in the first place; it looks like someone BCC'd my [EMAIL PROTECTED] address). Yes, I BCC'd you since you are maintaining a page on the wiki document

Re: SATA READ_DMA timeouts - SOLVED?

2008-09-30 Thread Wojciech Puchar
The Wikipedia article you refer to documents a very well-known topic: the SATA150-limiting jumpers on hard disks. Drive vendors have this jumper enabled (capped) by default due to incompatibilities with certain in friday i bought 2 new 750GB disks, connected it and got SATA-300, one was samsun

Re: SATA READ_DMA timeouts - SOLVED?

2008-09-29 Thread Jeremy Chadwick
(I'm not subscribed to freebsd-questions, so please CC me on replies. I'm also not sure how I ended up getting this mail in the first place; it looks like someone BCC'd my [EMAIL PROTECTED] address). Reid, The Wikipedia article you refer to documents a very well-known topic: the SATA150-limiting

SATA READ_DMA timeouts - SOLVED?

2008-09-29 Thread Reid Linnemann
I've seen a number of people having DMA troubles with SATA disks on FreeBSD6 and FreeBSD7, and I'm in the same boat. A while back I posted looking for help but none could really be found. Today I finally got to the bottom of things (at least so far). Hardware incompatibility. According to ht