Hi Nick, At 01:36 PM 8/15/2002 +0100, Nick Lindsell wrote: >>The 3 hard discs for this test are of 40G storage, 2M cache and 7,200 >>rpm. One problem remains unsolved is my old motherboard used only >>supporting ATA33. > >You may run into bios limitations on an old board seeing drives of that >size - I have two >machines that will not see drives over 30G. Your mileage may vary...
Fortunately my mother can see drives over 30G. It is a Pt-II motherboard >> I am considering using an available PCI RAID card (0, 1, 0+1), if >> possible. Whether it can help??? > >That sounds a bit like a Promise chipset - we've never got raid-5 running >on those. It is Zoltek PCI RAID card, not Promise. Anyway I will test it to see what happens. >> Or I have to purchase a new ATA133 controller for this test. In such >> case each hard disc can be connected to a separate slot. > >That would be ideal and certainly a must for a production setup but if you >are only >experimenting and playing with the config files then your original setup >will suffice >as long as speed is not an issue. Noted with thanks >>>2) Running two drives on the same interface will cause severe >>>performance degradation. >>>3) The array with /boot on it must be raid0 or 1 - raid5 does not work >>>for bootloaders. >> >>I recognize such a problem. In such a case could I use the PCI RAID card >>to solve this problem, 2 ATA 133 hard discs connected to its slots (it >>has 2 slots) and the 3rd hard disc connected to primary IDE of the >>motherboard. Its BIOS boots the PC at start. > >That sounds fine. As long as the RedHat installer sees three drives, >you'll be OK. Noted. My experiment will inform me. >>It becomes Hardware RAID + Software RAID in one PC. Can it work? > >The only time I've seen something similar to what (I think) you mean is >some onboard >raid controllers needed to be told they were raid in order to boot, >although redhat treated >the devices as separate and therefore made a software raid on them. (??) Noted >>>I run software raid-5 pretty much everywhere so throw me a line if you >>>feel the need. >>>There's a software raid monitor tool at >>>"ftp://ftp.nexnix.co.uk/pub/linux/scripts/mdmon"; >>>if you should need it. >> >>Lot of thanks for your assistance offered. I will contact you to your >>private email address and cc this list, if other subscribers don't mind >>and if they expect to gain some experience on software RAID 5. > >cc to the list - no point in emailing me privately as I read the list >anyway. That way others can >join in and the dialogue will make it into the archives for later searches. Noted. That is a good idea. >>The software RAID monitor tool is only a perl script. How to use it ? > >Just modify the first couple of lines to reflect your email address (I >really would rather not >get your raid status reports.. ) and the network name of a Windows machine >you want to >receive pop-up alerts on, if you have one. Leave blank otherwise. Then >either run it by hand, >"./mdmon" or make an entry in your crontab for it:- > ># Check status of raid array hourly >0 * * * * /usr/local/cronjobs/mdmon 1>/dev/null 2>/dev/null Noted. I will install it after having setup the RAID 5 box. Additionally have you had experience on RAID over LAN using enbd or mirroring using drdb ? That was started by a Spanish if my information is correct. Or shall I start another topic ? Have a nice day Stephen -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe https://listman.redhat.com/mailman/listinfo/redhat-list
