"Bryan J. Smith" <b.j.smith@xxxxxxxx> wrote:
> Lastly, I've also not seen FRAID-5 supported yet either.
FYI, from the kernel 2.4 iswraid README:
While they may or may not be distinguishing features,
iswraid also:
* supports RAID0 (striping) over n-disk volumes;
* supports RAID1E (mirroring with striping) over n-disk
volumes---this is equivalent to RAID1 for 2-disk volumes
and to RAID10 for 4-disk volumes;
* supports multiple volumes per array ("Matrix RAID");
Again, no newer FRAID-5 support. I'd actually like to see
how well Windows FRAID-5 works against software RAID-5 in
Linux.
* deals with missing disks in a reasonable manner;
This one is my favorite. ;->
In other words, the fact that you have no intelligence local
to the hardware is a major issue, one that software can't
solve. I.e., you can't just hot-swap FRAID hardware, let
alone if a device goes down, the kernel might panic.
Why? Because the "raw" individual drives are still what the
kernel communicates with.
* can operate with volumes in degraded mode (unless
instructed not to);
* implements disk error thresholds;
* tries to satisfy failed RAID1E reads using each failed
disk's mirror.
Again, more subjective differences that could be an issue
between the FRAID 16-bit BIOS and the OS -- especially when
dual-booting.
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Bryan J. Smith | Sent from Yahoo Mail
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