Re: software raid drive failed, please provide step bu step torebuild

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I know its a raid 0 is a stripe.
Its my swap partition.
Why would I need fault tolerance on my swap.

Anyway,
I did what Sam suggested.
md0 is fine, md1 doesn't exist
mdadm -Q -D /dev/md2
it yeilded
/dev/md2:
        Version : 00.90.01
  Creation Time : Mon Feb 14 06:42:28 2005
     Raid Level : raid5
     Array Size : 34812416 (33.20 GiB 35.65 GB)
    Device Size : 17406208 (16.60 GiB 17.82 GB)
   Raid Devices : 3
  Total Devices : 2
Preferred Minor : 2
    Persistence : Superblock is persistent
Update Time : Fri Jul 28 17:56:25 2006
          State : clean, degraded
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0
Layout : left-symmetric
     Chunk Size : 256K
 Number   Major   Minor   RaidDevice State
       0       8        3        0      active sync   /dev/sda3
       1       8       19        1      active sync   /dev/sdb3
       2       0        0       -1      removed
           UUID : b4b161bc:2953b117:9c13c568:47693baa
         Events : 0.31307539

What if the  next step this is my mail server and I really don't have the
time to reload it.
I have my fstab, partition, mdstat,  infomation.
I ran this command sfdisk -d > sdb-parts.dump before a added the new drive.
Will any of this help?

Like I said before the only raid/partition experience I have is at initial
installation.



----- Original Message ----- 
From: "Jeff Vian" <jvian10@xxxxxxxxxxx>
To: "For users of Fedora Core releases" <fedora-list@xxxxxxxxxx>
Sent: Friday, July 28, 2006 5:44 PM
Subject: Re: software raid drive failed, please provide step bu step
torebuild


> On Fri, 2006-07-28 at 16:29 -0500, Dan Carl wrote:
> > I have/had a software raid running and sdc drive failed.
> > I got a replacement drive today and installed it.
> > My only experience with set partitions and raids in during initail
setup.
> > I could not fdisk the new drive because i guess it wasn't reconized so I
> > rebooted.
> > Now I can reach the drive via fdisk but I have made more problems now
(no
> > swap now)
> > and I'm not sure the steps to rebuild.
> > Background:
> > I have a FC3 with a software raid.
> > I have 3 SCSI 18gb hard drives
> > If I recall this how I set it up
> > md0 /boot 100MB raid 1 sda, sdb and sdc as spare
> > md1 /swp 768MB raid 0 sda, sdb, sdc
> This toasted your /swp partition.
> Raid 0 is striping, and a single failure toasts the entire device.
>
> You would have been ahead with a non-raid swap, and had 3 separate
> partitions, one on each device, for swap.  Failure of one would not have
> toasted all.
>
>
> > md2 / ext3 33GB raid 5 sda, sdb, sdc
> >
> > Can someone please help?
> >
>
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