jlc Posted November 20, 2003 Report Share Posted November 20, 2003 Here's the break down. Dell Precision™ WorkStation 420 Dual P3 @866MHz 512 Rambus 800mHz Ram Nv GeForce 2 GTS 32MB DVD Crystal Sound ?? HD = 4@32GB SCSI 160 10k something or another?? :P Anyway, I'm going to use it to "play" around on and also save data on some space, do's anyone think I should "waste" or "be safe" and use RAID between two of the drives?? I need some thoughts and suggestions, remeber you have 4 @ 36GB drives to play with. That's your homework, go go go! /sda /sdb /sdc /sdd Quote Link to comment Share on other sites More sharing options...
jlc Posted November 21, 2003 Author Report Share Posted November 21, 2003 Wow, no one? People must hate me or something? I was thinking / /usr /opt /tmp /var & swap under LVM on a & b /home with RAID on the c & d. so I would have ruffly 33GB's of home space to save data and know if one disk goes down the other one will have my data. ??? Quote Link to comment Share on other sites More sharing options...
Gowator Posted November 21, 2003 Report Share Posted November 21, 2003 Sorry Cybrjackle, im on vacation. I,d go for a 0+1 across all four. It keeps cpu down for the old P3 s and Ive tested this on a E450. If you can use different controllers but since good controllers are expensive, then you create them inverted. Ie You stripe and mirror in a diagonal way. i.e. sda1and sdd1 make one stripe (md1) and sdb1 and sdc1 the other (md2). then you mirror md1+md2 as md0 Stick an OLD cheap IDE for /boot for safety and boot from md0 Quote Link to comment Share on other sites More sharing options...
Qchem Posted November 21, 2003 Report Share Posted November 21, 2003 Stripe and mirror would be my tactic too, as long as you have hardware RAID of course. I don't find software RAID to be worth it, but then my needs probably differ greatly to yours!! Quote Link to comment Share on other sites More sharing options...
Gowator Posted November 21, 2003 Report Share Posted November 21, 2003 Software RAID 0+1 is IMHO underrated. It takes trivial CPU and delivers better performance than RAID 5. (esp writes) The downside is loosing half your capacity. HW RAID is also over rated. Your fastest read is limited by the BW of the controller and host bus. On a PC this is less imposrtqnt but on your server you have 2 busses. Unfortunately they arnt switched like on a workstqiton but you can still read from one whilst writing to another. RAID 0+1 is also more secure than RAID 5 since it can be completely rebuilt without the indexing. In RAID 5 you always need to think about where to keep your RAID index; if this is on the ACTUAL ARRAY then its pointless because you cant access it if its damaged. If its on a single disk then its as friable as the single disk. Quote Link to comment Share on other sites More sharing options...
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