Subject: [Fwd: FW: Feisty Dunnart Configuration]
From: Mac Mason (macmasta@ak.net)
Date: Fri Feb 13 2004 - 12:21:20 AKST
Amazing what college students will find in a config file...
~Mac~
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Date: Fri, 13 Feb 2004 11:09:41 -0800
From: Dan Halperin <dhalperin@hmc.edu>
Subject: FW: Feisty Dunnart Configuration
To: jmason@hmc.edu
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-----Original Message-----
From: owner-east-dorm-chat-l@hmc.edu
[mailto:owner-east-dorm-chat-l@hmc.edu]On Behalf Of Michael Vrable
Sent: Friday, February 13, 2004 9:55 AM
To: Schmack
Subject: Feisty Dunnart Configuration
Discovered when configuring a new Linux kernel (2.6.2, for those who
care and didn't decipher the code name):
Multiple devices driver support (RAID and LVM) (MD) [Y/n/?] y
RAID support (BLK_DEV_MD) [M/n/y/?] m
Linear (append) mode (MD_LINEAR) [M/n/?] m
RAID-0 (striping) mode (MD_RAID0) [M/n/?] m
RAID-1 (mirroring) mode (MD_RAID1) [M/n/?] m
RAID-4/RAID-5 mode (MD_RAID5) [M/n/?] m
RAID-6 mode (EXPERIMENTAL) (MD_RAID6) [N/m/?] (NEW) ?
WARNING: RAID-6 is currently highly experimental. If you
use it, there is no guarantee whatsoever that it won't
destroy your data, eat your disk drives, insult your mother,
or re-appoint George W. Bush.
A RAID-6 set of N drives with a capacity of C MB per drive
provides the capacity of C * (N - 2) MB, and protects
against a failure of any two drives. For a given sector
(row) number, (N - 2) drives contain data sectors, and two
drives contains two independent redundancy syndromes. Like
RAID-5, RAID-6 distributes the syndromes across the drives
in one of the available parity distribution methods.
RAID-6 requires mdadm-1.5.0 or later, available at:
ftp://ftp.kernel.org/pub/linux/utils/raid/mdadm/
If you want to use such a RAID-6 set, say Y. To compile
this code as a module, choose M here: the module will be
called raid6.
If unsure, say N.
--Michael "wonders what else there is in the documentation" Vrable
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