Thread (44 messages) 44 messages, 11 authors, 2009-02-13

Re: [PATCH 00/18] Assorted md patches headed for 2.6.30

From: Dan Williams <hidden>
Date: 2009-02-12 22:57:12

On Thu, Feb 12, 2009 at 2:13 AM, Steve Fairbairn
[off-list ref] wrote:
Keld Jørn Simonsen wrote:
quoted
I would rather have functionality to convert raid10 to raid5.
raid1 should be depreciated, as raid10,n2 for all purposes is the same
but better implementation and performance, and raid10,f2 and raid10,o2
are even better.  Nobody should use raid1 anymore.
Complete ignorance of raid10 here, but is raid10,<anything> bootable, like
raid1 is?  I use raid1 on my root and boot partitions.
I would point out that raid1 is not, strictly speaking, bootable.
Yes, it happens to work because the bootloader can treat each disk as
a standalone device, but the bootloader has no idea if a given disk is
failed, rebuilding, or in-sync.  To reliably boot from raid you need
an option-rom that understands the on disk metadata format and exposes
the array as a single device to the bootloader.

Regards,
Dan
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