1. Before i install RHEL AS3, i have decided to make this system a very low downtime because this system 24hours using for production. Than i have 2pcs same size hardisk(hda,hdb) my purpose as same as what i said just now reduce the downtime(if faulty on hda HARDDISK) than can 15minutes to use hdb to continue run the system bacause production 24hours running.OK, during installation RHLE AS3, i put this two harddisk, than starting install RHLE AS3, I make a partition on hda, example: /boot , swap , / , /var only there the partition, than CAN I MAKE THOSE PARTITION ON hda AS A "RAID 1" AND ALSO SAME TO hdb(my meaning is i want the first harddisk and second harddisk totally same include all partition and file system) can i using RAID1 to do this?


2. IF during i install RHLE AS3, i don't do any RAID, than now i decided to make a raid on my system, can i using like disk druid(like during first time RHLE AS3 install have easy interface to make a choice to make RAID)? because the command to create RAID and LVM see very difficult.



THANK YOU VERY MUCH........

If you have a hardware raid 1 card, you can do this. If your thinking of software raid, or kernel based raid, I'm not sure if it's possible. 3Ware makes some competitively priced pci raid boards. You could probably get into one for 185.00USD. I don't think software raid is worth the risk. You might lose the installation on both drives, and have to keep the machine down for hours. I don't know how you are going to get as little as 15 min. downtime. Is this an upgrade, or a new install. A new install will take a while.