Peppercorn Posted May 19, 2004 Report Share Posted May 19, 2004 Hi again el Supremo's I am upgrading my system to 2 Sata 120 gig HD's setup up in a Raid environment. I have looked around a bit but I cannot find much info to find out if it is possible. So my question is does Mandrake 10 run and install OK with a Raid setup?????? Thanks for any experienced answers!! Peppercorn Quote Link to comment Share on other sites More sharing options...
GodFlesh Posted May 19, 2004 Report Share Posted May 19, 2004 software raid (no problem) or hardware raid with a special controller ? (probably problems) Quote Link to comment Share on other sites More sharing options...
Peppercorn Posted May 19, 2004 Author Report Share Posted May 19, 2004 Thanks! Is there a ny manual as to how to install Mandrake with the raid setup that anyone knows of?? Thanks in advance Quote Link to comment Share on other sites More sharing options...
GodFlesh Posted May 24, 2004 Report Share Posted May 24, 2004 if you want to use software raid, just say so at install time when doing custom partitionning. Quote Link to comment Share on other sites More sharing options...
Gowator Posted May 24, 2004 Report Share Posted May 24, 2004 software raid (no problem) or hardware raid with a special controller ? (probably problems) Well not strictly true. True HW raid is 100% transparent. No driver is needed becuase it appears to the OS as a disk! The problem is with some of these SATA raid controllers which are the RAID equivalent of linmodems or lin printers. the only partially implement RAID and leave most of it to the CPU. HW Raid 0 or 1 or 0+1 is a waste of time. The calculation is trivial RAID 5 .. perhaps but fully HW and cached. 100% SW 0,1,0+1 works fine on the md drivers. Quote Link to comment Share on other sites More sharing options...
GodFlesh Posted May 25, 2004 Report Share Posted May 25, 2004 I wonder what is the CPU usage on using software raid vs normal setup. anyone has benchmarks ? Quote Link to comment Share on other sites More sharing options...
Gowator Posted May 25, 2004 Report Share Posted May 25, 2004 RAID 1 is trivial.... its not worth measuring :D CPU wise I guess if you want to measure it then just run a top and look at the md devices. Its REALLY LOW though... like you might be worried on a 386 .... its a SIMPLE algorthm .. it basically just copies... whereas RAID 5 is a lot more involved Last time I REALLY measured this was not on an Intel machine but a Sun E450 with 2x450Mhz USparc II CU's and Solaris 7. The machine had 16 RAID arrays of 0+1 and read at 200MB/sec wrote at 100MB/sec and CPU usage was nominal. (less than X or top) in a very heavy mulituser environment. It really wasnt worth worrying about cpu usage so for a modern PC on a single user I cant see it being significant. Quote Link to comment Share on other sites More sharing options...
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