Ross S. W. Walker wrote:
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Ruslan Sivak Sent: Thursday, May 10, 2007 4:31 PM To: CentOS mailing list Subject: Re: [CentOS] Re: Anaconda doesn't support raid10
Ross S. W. Walker wrote:
I can get all that data, but can I actually test it somehow? Does linux know anything about NCQ, or is everything abstracted to the controller?
Good question, not knowing the answer I did a quick google and this came to the top:
http://linux-ata.org/driver-status.html
another good one,
http://blog.kovyrin.net/2006/08/11/turn-on-ncq-on-ich-linux/
Looks like support wasn't added until 2.6.18 and isn't widely supported until 2.6.19 and 2.6.20.
-Ross
Ross,
Thank you for the links. Looks like my controller doesn't support NCQ :-(. I have the SIL 3114 based card. Doesn't look like there are any cheap alternatives on the PCI bus, but I think I can live with the performance of this system.
How did it go creating the interleaved LVs?
-Ross
It worked... I think.
I already had the LVM partitions set up, but when I booted up into the install, and went to the shell, I couldn't see them (although the installer saw them). I had to do raidstart on all my md devices, and then scan by doing somethign liek vgscan and lvscan, and then the devices showed up. So I deleted them and re-added them, per your instructions, and when I printed out the config, looks like they were striping. I was then able to install on it. So I don't think the reboot step is necessary, you just need to precreate the config manually in the shell first.
Thanks for your help.
Russ