adding drives to a RAID 5 array
Posted on 2004-10-02
How easy is it to add drives to a RAID 5 array?
i'm getting an external IBM EXP400 DAS SCSI storage enclosure that supports up to 14 disks. I'm starting with 4 300 GB disks and will scale up when i need more storage.
I think its pretty easy to add RAID 1 disks to this - i just add another two and configure them.
what about RAID 5? as i understand it, in RAID 5 all disks depend on each other... so how do you add new disks? do you have to take down the array and then add the disks and bring it back up again? Is there any way to do it on the fly by adding hot-swappable disks?