Hi Nick, Thanks for your response
At 10:52 AM 8/15/2002 +0100, you wrote: >At 17:26 15/08/2002 +0800, you wrote: >>Proposed setup :- >>Hardware available >>2 ATA133 hard discs >>1 ATA100 hard disc >> >>1 ATA 133 hard disc connected to IDE (primary) slot of the motherboard as >>MASTER as parity 1 & 2 (block 3 & 5) >> >>1 ATA 133 hard disc connected to IDE (primary) slot of the motherboard as >>SLAVE as parity 3 & 4 (block 1 & 6) >> >>1 ATA '100' hard disc connected to secondary IDE slot of the motherboard >>as MASTER as parity 5 & 6 (block 2 & 4) >> >>Will above connection be OK? If hard discs of different spec are used, >>does it affect the RAID performance? >> >>Your advice would be appreciated. Thanks in advance > >A few points:- > >1) The array will be bottlenecked by the slowest drive. >2) The total size of the arrays is dependant on the smallest drive. 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. I am considering using an available PCI RAID card (0, 1, 0+1), if possible. Whether it can help??? 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. Kindly advise. >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. It becomes Hardware RAID + Software RAID in one PC. Can it work? Have you had any comments? >4) This should be fine if you just want to experiment - there's a lot to >work out with software >raid when it comes to configuration files and testing for and replacing >failed drives without >losing data. > >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. The software RAID monitor tool is only a perl script. How to use it ? Thanks in advance. Stephen -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe https://listman.redhat.com/mailman/listinfo/redhat-list
