Software RAID weirdness question

[Robert Meyer]

Dropped a step in the procedure below :-/

--- Robert Meyer <meyer_rm at yahoo.com> wrote:
> I wrote a wonderful, in depth response to this message and when I sent it,
> yahoo informed me that my login expired and that I'd have to relogin.  Of
> course, the message that I typed in was gone so you'll have to do with this
> version :-)  We don't mind answering questions at all.  That's why we're
> here.
> 
> First of all, if you could send along a copy of your '/etc/raidtab' file, it
> would be most helpful.  This file is used by 'mkraid' and 'raidstart' so it's
> contents are kinda important.
> 
> The sequence of events for building and mounting a RAID filesystem are:
> 1) modify the '/etc/raidtab' file to define the RAID devices that you're
> building.
> 
> 2) run 'mkraid' with as many options as makes you happy.

Oops... 2a) run 'raidstart' to activate the array
> 
> 3) build a filesystem on the '/dev/md' device using something like 'mke2fs'
> or
> 'mkreiserfs'
> 
> 4) mount the filesystem with the 'mount' command pointed to '/dev/md??' or
> add
> the mount point to '/etc/fstab' using the '/dev/md??' device.
> 
> 5) kick back and open a cold one, knowing that you've saved the world from
> fried drives :-)
> 
> Note that I haven't actually TRIED this :-).  This is information that I've
> gleaned from the man pages while I was researching doing this for a customer.
> 
> We still haven't gotten around to trying it.  Note that you probably cannot
> do
> this simply with the root file system.
> 
> By the way, do you folks have any good, straight grained Osage Orange there? 
> I
> want to build a longbow and need to find some 4/4 by whatever width by at
> least
> 7-1/2 feet.  I built an electric guitar out of Padauk and Bocote that I
> bought
> at Certainly Wood some time ago.
> 
> Cheers!
> --- "Gregory J. Neumann" <gregneumann at netscape.net> wrote:
> > First real post here.  Hope you don't mind a question: :-)
> > 
> > I am trying to implement software RAID 1 on my Slackware 7.1 box w/ dual
> 9.1
> > gig ultra-SCSI drives, 2.2.19 kernel, RAID 1 support compiled in and the
> > latest available raidtools 0.90 pkg.  AFAICT, there is no patch for RAID
> for
> > the 2.2.19 kernel.
> > At one point I managed to get a raid set up "accepted" as a RAID 0, but I 
> > wanted to change it to RAID 1.  
> > In keeping w/ the HOWTO, I originally set the raid partitions w/ the 
> > permanent super-block.  Now the kernel registers the personality, but 
> > every time I try to "raidstart", I get "invalid argument: /dev/md0".  
> > "mkraid" aborts on "seems to be part of an active raid", even w/ the
> > "really-force" option.  However, "/proc/mdstat" lists all raids as 
> > inactive.  "/syslog" doesn't have any references, same w/ "/messages". 
> > "dmesg" just shows a successful RAID 1 personality registration at startup.
> > 
> > I can delete the partitions w/ fdisk, bring them back as regular 83
> > partitions, mke2fs them and write data.  Then delete and set them up as
> RAID
> > again, and the same things happen.  I have even deleted the /dev/md* and
> > reinstalled the raidtools.  Same thing.  Even changing the partition sizes
> > doesn't work.
> > 
> > The HOWTO and all online docs I can find are very out of date.  None of the
> > docs or articles I find even hint on what I should do.
> > 
> > Whew!  I guess that's about as persistent as a super-block can be!  This 
> > really mystifies me!  Any ideas at all?
> > 
> > Best regards,
> > Greg
> > -- 
> > Gregory J. Neumann, E-mail: info at certainlywood.com
> > Certainly Wood Inc., 13000 Route 78, East Aurora, NY 14052-9515
> > Tel: 716-655-2769, Fax: 716-655-3446
> > __________________________________________________________________
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> 
> 
> =====
> Bob Meyer
> Knightwing Communications, Inc.
> 36 Cayuga Blvd
> Depew, NY 14043
> Phone: 716-308-8931 or 716-681-0076
> Meyer_RM at Yahoo.com
> 
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=====
Bob Meyer
Knightwing Communications, Inc.
36 Cayuga Blvd
Depew, NY 14043
Phone: 716-308-8931 or 716-681-0076
Meyer_RM at Yahoo.com

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