Re: RAID10 on Debian (or RAID0 on top of RAID1) - possible?
It is so much better to use hardware raid.
And it's even better if you properly utilize a dual-channel raid controller.
Set up both channels for raid usage.
Stripe along the channel and mirror the stripes across the channels.
This eliminates the i/o penalty for mirroring and gives you the boost from
striping.
If you have hotswap drives, this configuration also saves you from having
the logical drive fail during a hotswap operation due to noise on the bus
caused by the hotswap operation. Only drives on the same channel are
affected by hotswap noise, so the mirror on the other channel stays up while
you re-configure the other one.
So you end up with 1 logical drive from the o/s perspective.
Logical Drive 0
Chan 0 1
S-0-1\_Mirror_/S-1-1
S-0-2/ \S-1-2
----- Original Message -----
From: "Tomasz Chmielewski" <mangoo@wpkg.org>
To: <debian-user@lists.debian.org>
Sent: Wednesday, August 09, 2006 10:18 AM
Subject: RAID10 on Debian (or RAID0 on top of RAID1) - possible?
I wanted to install a Debian system on RAID-10, on 4 disks.
Unfortunately, it seems that Debian installer only supports RAID0, RAID1
and RAID5.
As RAID-10 is technically RAID-0 on top of RAID-1s, I tried such a
scenario:
-----R0-----
| |
R1 R1
| | | |
HDD1 HDD2 HDD3 HDD4
Unfortunately, Debian installer is also unable to create such a setup - it
seems that it can't create RAID devices on existing RAID devices (i.e.,
RAID-0 on RAID-1).
How can I set up RAID-10 (or RAID-0 on top of RAID-1) using the Debian
installer?
--
Tomasz Chmielewski
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