Re: [CentOS] 3Ware 9550SX and latency/system responsiveness
Simon Banton wrote: At 08:09 -0400 14/9/07, Jim Perrin wrote: Have you done any filesystem optimization and tried matching the filesystem to the raid chunk size? No, I haven't. This is 3ware hardware RAID-1 on two disks with a single LVM ext3 / partition - I'm afraid I don't know how to go about discovering the chunk size to plug into Ross's calcs. You can see the chunk size either in the raid's BIOS tool (Alt-3 at startup) or, if installed, in the 3dm CLI (defaults to 64k, I think). -- Sebastian ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] hardware raid vs fake raid
Hi Tom, Tom Diehl wrote: Does anyone know how I can find out if an ibm serveraid 8k sas storage controller (zero channel RAID) is a real hardware RAID controller and supported in the standard CentOs kernel or is it a fake raid controller. I am trying to decide if I should get the serveraid controller or go get a 3ware controller. although not the freshest, this site always turned out to be helpful getting infos for SATA raid cards (the fake check): http://linuxmafia.com/faq/Hardware/sata.html In the according document, http://linuxmafia.com/faq/Hardware/sas.html nothing is stated about a fake SAS card (but indeed about linux compatibility). Maybe in this league, cheating customers is not so common. Does anybody know a SAS/SCSI raid card which does hidden software raid instead of hardware? Regards, Sebastian ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: hardware raid vs fake raid
Mogens Kjaer wrote: My IBM x3500 machines have this card: # lspci ... 03:00.0 RAID bus controller: Adaptec AAC-RAID (Rocket) (rev 02) ... I'm not quite sure if this also has an IBM serveraid name. I don't think it is fakeraid; setting up raid devices can take place at bios level, the buildup of the RAID5 or RAID6 volumes can run without any drivers loaded. If this is fakeraid I would like a clear definition of the term fakeraid. First we should clearly distinguish between SAS and SATA raid cards ;) As far as I see, the Adaptex AAC-RAID card is a SATA card, while Adaptec's SAS cards are called AIC, ASC/ASR or ASR (please correct me if I'm wrong! Accept my apologies in advance if I am). According to the link posted earlier (http://linuxmafia.com/faq/Hardware/sata.html), your Adaptec card is real hardware (I would also agree on your definition of fakeraid as being dependent on drivers, but these could also be set up in BIOS!). Many other (expecially cheap) Adaptec cards are fake raid cards. -- Sebastian ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: hardware raid vs fake raid
Mogens Kjaer wrote: Sebastian Walter wrote: ... As far as I see, the Adaptex AAC-RAID card is a SATA card, while Adaptec's SAS cards are called AIC, ASC/ASR or ASR I have 8 *SAS* disks on my AAC-RAID card: Thanks for pointing this out. But maybe lspci is wrong, as it is in fact an IBM serveraid card (made by adaptec)? See a comment about this here: http://linuxmafia.com/faq/Hardware/sata.html#ibm It seems IBM uses Adaptec controllers. Some of IBMs are also Intel IHC-oriented and therefore fakeraids. They are called HostRAID. -- Sebastian ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] shrink LV with ext3 filesystem
Thomas Antony wrote: Is it possible that i log into the server with ssh and umount only /var and then resize the logical volume? Try it. Most probably the system will tell you that the disk is in use. What you could do then is booting from a live CD and resize it from there (System will be offline, of course). Regards Sebastian ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can't print from Firefox
Can you maybe print to file (Is the Print dialog showing up at all)? If you can print to a postscript file, you can print it using lp afterwards... regards, Sebastian Niki Kovacs wrote: Niki Kovacs schrieb: Hi, I've just installed CentOS 5.0 on my father's laptop, in replacement of Windows XP. Everything runs fine, except I can't seem to print from Firefox. Nobody can help me on this? I really need to set this up, and I'm going back to France tomorrow morning. Niki ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
