From: "H. Peter Anvin" <hpa@zytor.com>
To: Doug Ledford <dledford@redhat.com>
Cc: John Stoffel <john@stoffel.org>, Michael Tokarev <mjt@tls.msk.ru>,
linux-raid@vger.kernel.org
Subject: Re: Time to deprecate old RAID formats?
Date: Thu, 01 Nov 2007 14:02:24 -0700 [thread overview]
Message-ID: <472A3EE0.3090503@zytor.com> (raw)
In-Reply-To: <1193186569.10336.30.camel@firewall.xsintricity.com>
Doug Ledford wrote:
>>
>> I would argue that ext[234] should be clearing those 512 bytes. Why
>> aren't they cleared
>
> Actually, I didn't think msdos used the first 512 bytes for the same
> reason ext3 doesn't: space for a boot sector.
>
The creators of MS-DOS put the superblock in the bootsector, so that the
BIOS loads them both. It made sense in some diseased Microsoft
programmer's mind.
Either way, for RAID-1 booting, the boot sector really should be part of
the protected area (and go through the MD stack.) The bootloader should
deal with the offset problem by storing partition/filesystem-relative
pointers, not absolute ones.
-hpa
next prev parent reply other threads:[~2007-11-01 21:02 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-19 14:34 Time to deprecate old RAID formats? John Stoffel
2007-10-19 15:09 ` Justin Piszcz
2007-10-19 15:46 ` John Stoffel
2007-10-19 16:15 ` Doug Ledford
2007-10-19 16:35 ` Justin Piszcz
2007-10-19 16:38 ` John Stoffel
2007-10-19 16:40 ` Justin Piszcz
2007-10-19 16:44 ` John Stoffel
2007-10-19 16:45 ` Justin Piszcz
2007-10-19 17:04 ` Doug Ledford
2007-10-19 17:05 ` Justin Piszcz
2007-10-19 17:23 ` Doug Ledford
2007-10-19 17:47 ` Justin Piszcz
2007-10-20 18:38 ` Michael Tokarev
2007-10-20 20:02 ` Doug Ledford
2007-10-19 22:43 ` chunk size (was Re: Time to deprecate old RAID formats?) Michal Soltys
2007-10-20 13:29 ` Doug Ledford
2007-10-23 19:21 ` Michal Soltys
2007-10-24 0:14 ` Doug Ledford
2007-10-19 17:11 ` Time to deprecate old RAID formats? Doug Ledford
2007-10-19 18:39 ` John Stoffel
2007-10-19 21:23 ` Iustin Pop
2007-10-19 21:42 ` Doug Ledford
2007-10-20 7:53 ` Iustin Pop
2007-10-20 13:11 ` Doug Ledford
2007-10-26 9:54 ` Luca Berra
2007-10-26 16:22 ` Gabor Gombas
2007-10-26 17:06 ` Gabor Gombas
2007-10-27 10:34 ` Luca Berra
2007-10-26 18:52 ` Doug Ledford
2007-10-26 22:30 ` Gabor Gombas
2007-10-28 0:26 ` Doug Ledford
2007-10-28 14:13 ` Luca Berra
2007-10-28 17:47 ` Doug Ledford
2007-10-29 8:41 ` Luca Berra
2007-10-29 15:30 ` Doug Ledford
2007-10-29 21:44 ` Luca Berra
2007-10-29 23:05 ` Doug Ledford
2007-10-30 3:10 ` Neil Brown
2007-10-30 6:55 ` Luca Berra
2007-10-30 16:48 ` Doug Ledford
2007-10-27 8:00 ` Luca Berra
2007-10-27 20:09 ` Doug Ledford
2007-10-28 13:46 ` Luca Berra
2007-10-23 23:09 ` Bill Davidsen
2007-10-23 23:03 ` Bill Davidsen
2007-10-24 0:09 ` Doug Ledford
2007-10-24 23:55 ` Neil Brown
2007-10-25 0:09 ` Jeff Garzik
2007-10-25 8:09 ` David Greaves
2007-10-26 6:16 ` Neil Brown
2007-10-26 14:18 ` Bill Davidsen
2007-10-26 18:41 ` Doug Ledford
2007-10-26 22:20 ` Gabor Gombas
2007-10-26 22:58 ` Doug Ledford
2007-10-27 11:11 ` Luca Berra
2007-10-27 15:20 ` Bill Davidsen
2007-10-28 0:18 ` Doug Ledford
2007-10-29 0:44 ` Bill Davidsen
2007-10-27 21:11 ` Doug Ledford
2007-10-29 0:48 ` Bill Davidsen
2007-10-30 3:25 ` Neil Brown
2007-11-02 12:31 ` Bill Davidsen
2007-10-25 7:01 ` Doug Ledford
2007-10-25 14:49 ` Bill Davidsen
2007-10-25 15:00 ` David Greaves
2007-10-26 5:56 ` Neil Brown
2007-10-24 14:00 ` John Stoffel
2007-10-24 15:18 ` Mike Snitzer
2007-10-24 15:32 ` Bill Davidsen
2007-10-20 14:09 ` Michael Tokarev
2007-10-20 14:24 ` Doug Ledford
2007-10-20 14:52 ` John Stoffel
2007-10-20 15:07 ` Iustin Pop
2007-10-20 15:36 ` Doug Ledford
2007-10-20 18:24 ` Michael Tokarev
2007-10-22 20:39 ` John Stoffel
2007-10-22 22:29 ` Michael Tokarev
2007-10-24 0:42 ` Doug Ledford
2007-10-24 9:40 ` David Greaves
2007-10-24 20:22 ` Bill Davidsen
2007-10-25 16:29 ` Doug Ledford
2007-11-01 21:02 ` H. Peter Anvin [this message]
2007-11-02 15:50 ` Doug Ledford
2007-10-24 0:36 ` Doug Ledford
2007-10-23 23:18 ` Bill Davidsen
2007-10-19 16:34 ` Justin Piszcz
2007-10-23 23:19 ` Bill Davidsen
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