On Tue, 10 Nov 1998, Johns Daniel wrote:
> You can probably get more throughput with a dual-channel
> controller like the Mylex 952(?). And, I believe it
> is cheaper than the 958!
Actually, I was thinking of a Diamond Fireport Dual using Symbios parts.
But right now, I'm rather pleased with the performance -- system is
actually a home machine, not a server, built from El Cheapo used parts.
> I am still confused by the chunk and stride parameters.
> How do I check the values on my system? How do I set
> these two values?
Chunk size is set in /etc/raidtab and can be checked via /proc/mdstat if
you have a recent enough RAID driver. If you have n disks and chunk size
is m KB, then total size of a stripe is nm KB.
Stride is a filesystem, not a device driver, parameter. See man mke2fs
for info. It basically specifies the the size of an interval between
superblocks. As far as I can tell, there's no direct way of finding out
the stride of an e2fs partition, although it shouldn't be too difficult
figuring it out from the allocation map of the superblocks which can be
called up via dumpe2fs.
-- Kim-Ee
