From: "H. Peter Anvin" <hpa@zytor.com>
To: Bill Davidsen <davidsen@tmr.com>
Cc: berk walker <berk@panix.com>, Doug Ledford <dledford@redhat.com>,
Janek Kozicki <janek_listy@wp.pl>,
linux-raid@vger.kernel.org
Subject: Re: switching root fs '/' to boot from RAID1 with grub
Date: Sat, 03 Nov 2007 20:44:45 -0700 [thread overview]
Message-ID: <472D402D.6040900@zytor.com> (raw)
In-Reply-To: <472D3A1C.800@tmr.com>
Bill Davidsen wrote:
>>>
>> Depends how "bad" the drive is. Just to align the thread on this -
>> If the boot sector is bad - the bios on newer boxes will skip to the
>> next one. But if it is "good", and you boot into garbage - - could be
>> Windows.. does it crash?
>
> Right, if the drive is dead almost every BIOS will fail over, if the
> read gets a CRC or similar most recent BIOS will fail over, but if an
> error-free read returns bad data, how can the BIOS know.
>
Unfortunately the Linux boot format doesn't contain any sort of
integrity check. Otherwise the bootloader could catch this kind of
error and throw a failure, letting the next disk boot (or another kernel.)
-hpa
next prev parent reply other threads:[~2007-11-04 3:44 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-30 20:07 switching root fs '/' to boot from RAID1 with grub Janek Kozicki
2007-10-30 20:37 ` Janek Kozicki
2007-10-30 22:01 ` Doug Ledford
2007-10-31 15:01 ` Janek Kozicki
2007-10-31 17:38 ` Doug Ledford
2007-10-31 20:12 ` xosview + RAID (was: switching root fs '/'...) Janek Kozicki
2007-10-31 20:47 ` xosview + RAID David Greaves
2007-11-01 17:31 ` switching root fs '/' to boot from RAID1 with grub H. Peter Anvin
2007-11-01 18:30 ` Doug Ledford
2007-11-01 18:57 ` H. Peter Anvin
2007-11-02 15:55 ` Doug Ledford
2007-11-01 19:04 ` Janek Kozicki
2007-11-01 19:20 ` Doug Ledford
2007-11-02 16:36 ` berk walker
2007-11-04 3:18 ` Bill Davidsen
2007-11-04 3:44 ` H. Peter Anvin [this message]
2007-11-04 4:28 ` Bill Davidsen
2007-11-04 18:02 ` H. Peter Anvin
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