Ricardo Kleemann <[EMAIL PROTECTED]> writes: > Few questions: > 1. can raid0/raid1 be done on either scsi or ide or both?
The linux md driver is software, so it doesn't care what the underlying block device technology is. You just give it block-device partitions to turn into a RAID device. These partitions can (at the least) be on SCSI or IDE devices. It dosnt' matter to the md driver. > 2. what's the difference between raid0 and raid1? >From /usr/doc/mdutils/README: Raid0 does a classic (and rather efficient) striping on disks (i.e. contiguous blocks on the md device are spread across real devices). It gives rather good performances on SCSI disks, specially with concurrent disk access. There's no limitation on disks sizes (i.e. sizes can be different, md will cope with this). Raid1 adds mirroring to raid0 striping. Note that it is not complete yet (no rebuild tools, error trapping is incomplete). It's also known to be rather slow when writing. >From the same source: Since MD pre0.31, RAID-[15] have been removed from the main distribution, because of pathological unstability... and for the kernel integration of linear and RAID-0 modes. > 4. How does one go about "creating" an md device? Would it automatically > mirror a "non-md" drive into the multiple devices? Get the debian mdutils package install it, and read the docs. -- Rob
