[WBEL-users] Grub and raid - Solved
Thrift Internet Service
thrift@thriftinternet.com
Sat, 10 Apr 2004 08:59:06 -0700
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Doesn't anyone know how to recover from a failed master using software =
RAID?
----- Original Message -----=20
From: Thrift Internet Service=20
To: Simone ; whitebox-users@beau.org=20
Sent: Friday, April 09, 2004 12:49 PM
Subject: Re: [WBEL-users] Grub and raid - Solved
I tried Fredrick Denny's recipe. I was able to recover from a failed =
slave drive and duplicate a new slave without a problem, but I can't =
seem to get the slave to be bootable after a failed master.
I moved the cable so the slave drive is now the master (/hde). I boot =
with the install CD and go into 'linux rescue'. At the command prompt I =
confirm that the drive is there with 'fdisk -l' and everything looks =
fine. Then I try to mount:
mount /dev/hde1 /mnt/fred
mount: Mounting /dev/hde1 on /mnt/fred failed: No such file or =
directory.
Of course there is no point in going any further. What happened when =
you simulated a master failure?=20
----- Original Message -----=20
From: Simone=20
To: whitebox-users@beau.org=20
Sent: Wednesday, April 07, 2004 12:54 PM
Subject: Re: [WBEL-users] Grub and raid - Solved
Hi list,
Thanks to Frederick Denny document I figured it out.=20
To anyone it could interest, this works: =
http://www.freddenny.com/UNIX/linuxRAID.html
Thanks anyway to anyone who paid attention to my message.
Simone
----- Original Message -----=20
From: Simone=20
To: whitebox-users@beau.org=20
Sent: Wednesday, April 07, 2004 9:04 PM
Subject: [WBEL-users] Grub and raid
Hi, as usual, having a question....
Say I have a raid 1, disks A and B in mirroring, Say A dies, and I =
replace it with C. How can I make grub write the MBR to C so that in =
case B also dies I can still boot from C?
Know it's a simple question, but I tried grub-install /dev/hdc or =
/dev/md0 (where the boot partition is) and I just get errors. I am now =
trying to move to lilo, but I am scared to write the MBR of the last =
good disk I have.=20
Help really appreciated, it looks like I'll be working all night =
:-(
Thanks,=20
Simone
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<DIV><FONT face=3DArial size=3D2>Doesn't anyone know how to recover from =
a failed=20
master using software RAID?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dthrift@thriftinternet.com=20
href=3D"mailto:thrift@thriftinternet.com">Thrift Internet Service</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dsimone72@email.it=20
href=3D"mailto:simone72@email.it">Simone</A> ; <A =
title=3Dwhitebox-users@beau.org=20
href=3D"mailto:whitebox-users@beau.org">whitebox-users@beau.org</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Friday, April 09, 2004 =
12:49=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: [WBEL-users] Grub =
and raid -=20
Solved</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>I tried Fredrick Denny's recipe. I =
was able to=20
recover from a failed slave drive and duplicate a new slave =
without a=20
problem, but I can't seem to get the slave to be bootable after a =
failed=20
master.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I moved the cable so the slave drive =
is now the=20
master (/hde). I boot with the install CD and go into 'linux rescue'. =
At the=20
command prompt I confirm that the drive is there with 'fdisk -l' and=20
everything looks fine. Then I try to mount:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>mount /dev/hde1 =
/mnt/fred</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>mount: Mounting /dev/hde1 on =
/mnt/fred failed: No=20
such file or directory.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Of course there is no point in going =
any further.=20
What happened when you simulated a master failure? </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dsimone72@email.it =
href=3D"mailto:simone72@email.it">Simone</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dwhitebox-users@beau.org=20
href=3D"mailto:whitebox-users@beau.org">whitebox-users@beau.org</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, April 07, =
2004 12:54=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: [WBEL-users] =
Grub and raid=20
- Solved</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>Hi list,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Thanks to <!--StartFragment =
--><FONT=20
size=3D3><FONT face=3D"Times New Roman"> </FONT><FONT face=3DArial=20
size=3D2>Frederick Denny</FONT><FONT face=3D"Times New Roman">=20
</FONT></FONT><FONT size=3D2><FONT face=3DArial>document I figured =
it=20
out</FONT>. </FONT></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>To anyone it could interest, this =
works: =20
<A=20
=
href=3D"http://www.freddenny.com/UNIX/linuxRAID.html">http://www.freddenn=
y.com/UNIX/linuxRAID.html</A></FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Thanks anyway to anyone who paid =
attention to=20
my message.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Simone</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- =
</DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dsimone72@email.it =
href=3D"mailto:simone72@email.it">Simone</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dwhitebox-users@beau.org=20
=
href=3D"mailto:whitebox-users@beau.org">whitebox-users@beau.org</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, April 07, =
2004 9:04=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [WBEL-users] Grub =
and=20
raid</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>Hi, as usual, having a=20
question....</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Say I have a raid 1, disks A and =
B in=20
mirroring, Say A dies, and I replace it with C. How can I make =
grub write=20
the MBR to C so that in case B also dies I can still boot from=20
C?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Know it's a simple question, but =
I tried=20
grub-install /dev/hdc or /dev/md0 (where the boot partition is) =
and I just=20
get errors. I am now trying to move to lilo, but I am scared to =
write the=20
MBR of the last good disk I have. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Help really appreciated, it looks =
like I'll=20
be working all night :-(</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Thanks, </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Simone</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2><BR>---<BR>Outgoing mail is =
certified Virus=20
Free.<BR>Checked by AVG anti-virus system (<A=20
=
href=3D"http://www.grisoft.com">http://www.grisoft.com</A>).<BR>Version: =
6.0.651 / Virus Database: 417 - Release Date:=20
=
05/04/2004</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HT=
ML>
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