From: "H. Peter Anvin" <hpa@zytor.com>
To: NeilBrown <neilb@suse.de>
Cc: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>,
linux-raid@vger.kernel.org
Subject: Re: metadata 1.2 advantages?
Date: Wed, 08 Feb 2012 16:38:08 -0800 [thread overview]
Message-ID: <4F331570.7010800@zytor.com> (raw)
In-Reply-To: <20120209105934.36189d93@notabene.brown>
On 02/08/2012 03:59 PM, NeilBrown wrote:
> On Wed, 08 Feb 2012 14:16:21 -0800 "H. Peter Anvin" <hpa@zytor.com>
> wrote:
>
>> On 02/08/2012 01:01 AM, Stefan Priebe - Profihost AG wrote:
>>> Hi,
>>>
>>> for now i'm still using grub 0.97 which can only understand
>>> metadata 0.9. Are there any advantages of the 1.2 metadata
>>> format?
>>>
>>
>> There are a lot of advantages to the 1.x metadata format, but 1.0
>> is the easiest for bootloaders to deal with. 1.0, 1.1 and 1.2 is
>> the same format, just with the superblock in different places.
>
> Hi Peter, wasn't it you who told be that 1.2 was best for boot
> loaders, as 1.0 uses block 0 which the bootloader also wants, while
> 1.2 uses a later block. That is why 1.2 is the default.
>
No, 1.1 uses block 0 which the bootloader wants.
Bootloaders need no special enabling to support 0.9 or 1.0 RAID-1.
1.2 requires special enabling, but is workable.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2012-02-09 0:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-08 9:01 metadata 1.2 advantages? Stefan Priebe - Profihost AG
2012-02-08 22:16 ` H. Peter Anvin
2012-02-08 23:59 ` NeilBrown
2012-02-09 0:38 ` H. Peter Anvin [this message]
2012-02-09 1:02 ` NeilBrown
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