RAID10 can theoretically survive a two drive loss in your siutation (they have to be the correct two drives :) ), whereas RAID0+1 will die if you have a two drive loss.
We currently use software RAID10 on our production database server and have 13 software RAID1 arrays (26 SCSI disks) and stripe across those. I had to patch the kernel, but we'll soon be moving to 26 software RAID1 arrays (52 SCSI disks) with a RAID0 stripe across those so we can get great disk I/O. You're probably going to lose a lot of performance by using 2 IDE channels because if I recall correctly only one drive at a time can write per channel. You can get a Promise Ultra IDE controller cheap these days: http://www.googlegear.com/jsp/ProductDetail.jsp?ProductCode=130401 http://www.googlegear.com/jsp/ProductDetail.jsp?ProductCode=130403 http://www.googlegear.com/jsp/ProductDetail.jsp?ProductCode=130405 So I would recommend grabbing one of those so you at least have one drive per channel. All you have to do to have /home on your software RAID device is mount /dev/md[NUMBER] to /home and away you go. Good luck, Andy. -----Original Message----- From: Molnar Peter [mailto:[EMAIL PROTECTED] Sent: Wednesday, March 19, 2003 4:26 PM To: [EMAIL PROTECTED] Subject: RAID modes and priority Hi! I've installed a RAID controller with 4 four winchesters into my machine, and I plan to use them in RAID 1+0 or 0+1. My first question is, which one is better? Unfortunately the 4 disks are on 2 ide channels (master and slave), so I thought using the slave disks as device 1 (mirror drives) in the RAID config in RAID 1 will minimize the performance loss caused by this setup. The next, I want to have my /home dir on this md device, but everything else on the system is on a standard IDE drive. How can I achieve this configuration. (IE. simply mount it to /home or something has to be adjusted Thank you in advance. -- Molnar Peter <[EMAIL PROTECTED]> -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
