Do you have the command you used to create the array the first time? -----Original Message----- From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid-owner@xxxxxxxxxxxxxxx] On Behalf Of Guy Sent: Wednesday, July 07, 2004 9:40 AM To: stephen@xxxxxxxxxxxxx Cc: linux-raid@xxxxxxxxxxxxxxx Subject: RE: Should I Start Over? You did not use the "missing" keyword. You just created a 3 disk array. If your array had 3 disks, you should have listed 2 of them and the "missing" keyword for the third. Why did you add a spare(hde1)? I am guessing your array had 4 disks. You should have done something like this: mdadm --create /dev/md0 --level=5 --raid-devices=4 /dev/hdg1 /dev/hdd1 /dev/hdc1 missing Note the "--raid-devices=4" and "missing". I think your data is gone. At least 1/3 or 1/4 of it. Which ever disk it is rebuilding to, has been trashed! Stop the array and re-create it, but this time list the disk as missing. Do this command to determine which disk is being re-built: cat /proc/mdadm You must do this before the re-build is finished! Guy -----Original Message----- From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid-owner@xxxxxxxxxxxxxxx] On Behalf Of Stephen Hargrove Sent: Wednesday, July 07, 2004 9:24 AM To: Luca Berra Cc: linux-raid@xxxxxxxxxxxxxxx Subject: Re: Should I Start Over? Luca Berra said: > > you can try to see if you can read your data by recreating the array in > degraded mode, so it does not rebuild. > > like: > mdadm --create /dev/md0 --level=5 /dev/hdc1 /dev/hdd1 missing > try substituting the word missing for each of the drives > and see if you can mount the filesystem > if you do find your data use: > mdadm /dev/md0 -a <the device you replaced with missing> > to have it added to the array again > Ok, I did the following: # mdadm --create /dev/md0 --level=5 --raid-devices=3 /dev/hdg1 /dev/hdd1 /dev/hdc1 mdadm: array /dev/md0 started. # mdadm /dev/md0 -a /dev/hde1 mdadm: hot added /dev/hde1 # mount /data mount: wrong fs type, bad option, bad superblock on /dev/md0, or too many mounted file systems # cat /proc/mdstat Personalities : [raid5] read_ahead 1024 sectors md0 : active raid5 hde1[4] hdc1[3] hdd1[1] hdg1[0] 240121472 blocks level 5, 64k chunk, algorithm 2 [3/2] [UU_] [>....................] recovery = 0.2% (282348/120060736) finish=2250.3min speed=884K/sec unused devices: <none> If I read your email correctly, I wasn't expecting this. But I'm also inexperienced enough to not really know what to expect. All I know is that I now have movement where, before, I had none. So is this good or bad? Is my data gone forever (I gave up on it a while back, so if it's gone, it's gone)? Thanks again, Luca. You rock! -- Steve - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
