Re: SATA RAID with Promise TX4 (Was: [opensuse] Recommendation for sata card?)
Hello all!
On 5/27/07, Darryl Gregorash
On 2007-05-26 23:36, HG wrote:
I have just ordered a Promise SATA300 TX4plus. It was the only
And now it arrived. :-)
page says that: "Summary: No TCQ. Newer cards support NCQ. Full SATA control including hotplug and PM on all." What is confusing? The card supports these, but the driver does not. The comment you quoted about the sata_promise driver suggests that that TCQ will not be supported in the driver, because there is NCQ support in the cards.
I think this is verified by the bool.msg : (couple of lines from there9 <6>scsi0 : sata_promise <6>ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) <6>ata1.00: ATA-7, max UDMA/133, 976773168 sectors: LBA48 NCQ (depth 0/32) <6> ata1.00: configured for UDMA/133 <5> Vendor: ATA Model: ST3500630AS Rev: 3.AA <5> Type: Direct-Access ANSI SCSI revision: 05 I'm running 2.6.18.8-0.3-default and if I understood correctly, that NCQ (depth 0/32) means that NCQ is not enabled in the driver. I'm obviously not getting the full 3Gb speed as my PIII (733MHz) is not quite up to that: <6>raid5: automatically using best checksumming function: pIII_sse <4> pIII_sse : 1494.000 MB/sec This was done to get large fault tolerant disk. Therefore I formatted with EXT3 and put the data journaling on (no UPS). But still I was hoping for better performance. Here is one output from bonnie++: Version 1.01d ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP delta 1G 19415 64 33664 40 24524 37 25513 73 60938 54 324.6 2 ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 15397 95 +++++ +++ 19647 86 13929 84 +++++ +++ 20957 92 So, the performance isn't very good. But this is a old computer (PIII 733, with 512Mb), so maybe the bottleneck is somewhere else. Or what do you think? The end goal is that this sits in a corner ("home made Buffalo TeraStation") and is accessed through the network. Currently I have 100Mb net, but I'm hoping to be able to change it to 1000Mb. But this is what I was disappointed with, from another (windows) computer I was reading a large 2,5Gb file, the network usage went only up to 63% of the capacity. I must try that with another client soon, but I was hoping for much better performance (I've seen 100Mb net go to steady 92%). And a strange thing, when I open sysinfo:/ in konqueror, this new RAID is not listed there under the disk information. Why could that be? Not that it matters, but I'm just not very confident that everything is ok (I upgraded 10.0 -> 10.2 + all possible upgrades there). -- HG. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On 2007-06-01 23:23, HG wrote:
<snip>
So, the performance isn't very good. But this is a old computer (PIII 733, with 512Mb), so maybe the bottleneck is somewhere else. Or what do you think? Well, it is a PCI card. What's the speed of the PCI bus? That's going to be the limiting factor.
-- Hypocrisy is the homage vice pays to virtue. -- François de La Rochefoucauld -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Hi!
On 6/2/07, Darryl Gregorash
On 2007-06-01 23:23, HG wrote:
<snip>
So, the performance isn't very good. But this is a old computer (PIII 733, with 512Mb), so maybe the bottleneck is somewhere else. Or what do you think? Well, it is a PCI card. What's the speed of the PCI bus? That's going to be the limiting factor.
True. Good guestion... I have no idea of the PCI bus speed. I actually thought that what ever it is, it's going to be more than (P)ATA and as Bonnie++ showed that the RAID was in the same ballpark as a PATA drive would be, I didn't think that PCI bus would be the limiting factor. But it must be - PIII 733MHz is not slowing the RAID parity calculations down, drives are fast, card is fast... that leaves the PCI bus I guess. -- HG. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On 2007-06-02 05:41, HG wrote:
<snip> thought that what ever it is, it's going to be more than (P)ATA and as Bonnie++ showed that the RAID was in the same ballpark as a PATA drive would be, I didn't think that PCI bus would be the limiting factor.
You could check the mobo specs online. That's a SATA300 card, but it's running at or near ATA133 speeds. I suspect, if you do check, you'll find the PCI bus speed is similarly 133 :-) -- Hypocrisy is the homage vice pays to virtue. -- François de La Rochefoucauld -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
participants (2)
-
Darryl Gregorash -
HG