From: Paul Jakma (Paul.Jakma at domain Digital.com)
Date: Wed 19 May 1999 - 15:26:31 IST
[Arghh.. i hate exchange! i sent this to vincent, but not the list... I want
an Exchange driver for Pine]
> >3x IBM uw scsi RAID0 -> 24MB/s sustained over 400MB... : )
>
> Snarl :-)
>
yep. :)
> I was actually pretty impressed by software RAID support under Linux.
>
> Took only a few mins to grab the latest copies of the software, install
> it, read the docs, and get a 2x4G RAID 0 array up and running. Very
> minor speed improvements, but it does allow a simple way to lever
> several older/smaller drives into a larger flat partition.
>
if manageability is the goal rather than performance, then LVM is 'way cool'
(TM). It basically put's an extra layer in between the filesystem and the
actual devices.
This allows you pool devices into groups, and create logical drives from
that group.
the really cool thing is that you can migrate/move/add devices really easily
from groups, without the filesystem being aware of it.
This allows you to do things like move data transparently from one bunch of
hard drives to another - without having to even unmount the filesystem! You
can also resize logical drives, but unfortunately ext2 doesn't support
resizing. (there's a commercial utility though - resize2fs).
Check out:
it already supports raid0. And works quite well. The eventual goal is to
merge the linux-raid and linux-lvm patches, which will be really
> >3x IBM uw scsi RAID0 -> 24MB/s sustained over 400MB... : )
>
> Snarl :-)
>
yep. :)
> I was actually pretty impressed by software RAID support under Linux.
>
> Took only a few mins to grab the latest copies of the software, install
> it, read the docs, and get a 2x4G RAID 0 array up and running. Very
> minor speed improvements, but it does allow a simple way to lever
> several older/smaller drives into a larger flat partition.
>
if manageability is the goal rather than performance, then LVM is 'way cool'
(TM). It puts an extra layer in between the filesystem and the actual
devices.
This allows you pool physical devices into groups, and create logical drives
from that group. Then you can migrate/move/add devices really easily between
groups, without the filesystem being even aware of it.
This allows you to do things like move data transparently from one bunch of
hard drives to another - without having to even unmount the filesystem! You
can also resize logical drives, but unfortunately ext2 doesn't support
resizing. (there's a commercial utility though - resize2fs).
Check out:
it already supports raid0. And works quite well. Worth checking out.
-paul
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