[UCI-Linux] hardware vs software SATA RAID
STROMBRG at uci.edu
Thu Mar 24 16:18:23 PST 2005
I've just written up a sort of top level RAID page in my notes:
1) My experiences with software RAID on linux, including md,
LVM2, NBD, ENBD, and more.
2) My experiences with software RAID on solaris
3) Distributed filesystems: GFS and Lustre
4) A comparison between "software RAID" and "hardware RAID"
5) A summary of my experience with the ESMF storage farm,
with a "Maxtor SATA+3Ware RAID"-centric perspective
PS: I'll be calling you in response to your other note momentarily...
On Thu, 2005-03-24 at 11:37 -0800, Harry Mangalam wrote:
> Has anyone had enough experience with setting up RAID on linux to be
> able to address the (dis)advantages with HW vs SW raid using SATA
> My understanding is that most SATA RAID controllers are 'fakeraid' -
> simple SATA controllers with SW drivers (for windows) to emulate the
> RAID. Linux has its own 'md' driver level to be able to do this, so
> buying a fakeraid controller is of limited use. On the other hand,
> some Promise controllers have RAID accelerators that may soon be
> supported (and Promise is actually promoting them as Linux-friendly,
> using open source drivers - the SX-8 anyway).
> Real HW RAID controllers such as the 3ware escalade series are quite
> expensive (>$400/8 disk controller) but do provide a RAID array that
> looks like a single device to the OS (?). The other downside is that
> 'upgrading' requires a firmware upgrade (requiring a Windows-boot
> disk or similar?).
> Our server has a built-in Silicon Image SATA controller to support 4
> drives which works fine, but we'll happily buy a 3ware card if it
> increases reliability or decreases admin complexity.
> Anyone booting off Linux RAID devices?
> If you use the the Linux SW RAID utils, how do you get notified of a
> disk failure other than checking the logs?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Size: 189 bytes
Desc: This is a digitally signed message part
Url : http://maillists.uci.edu/mailman/public/uci-linux/attachments/20050324/6988105e/attachment.bin
More information about the UCI-Linux