General :: Fedora Raid Recovery On /dev/md1?
Feb 22, 2010
This is my first post on LinuxQuestions.org, so I hope I am posting this this in the right forum, and English is not my mother language, so I hope I made myself understandable. I have this small Poweredge 350 server with two 80GB IDE hard drives running Red Hat Fedora 5, with software Raid 1. Some months ago hda started to have unrecoverable I/O read errors for some blocks. I leaved it that way for some time then hdb also started having same kind of issues. I got new hard drives and replaced hdb first, but the problem is mdadm hasn't been able to recover the raid. I have three LINUX RAID partitions conforming the raid 1 between hda and hdb
/dev/md0
/dev/md1
/dev/md2
[code]....
So how can I force the raid to be recovered ignoring the hda errors, is there a way to recover this?
View 7 Replies
ADVERTISEMENT
Feb 1, 2011
Could any RAID gurus kindly assist me on the following RAID-5 issue?I have an mdadm-created RAID5 array consisting of 4 discs. One of the discs was dropping out, so I decided to replace it. Somehow, this went terribly wrong and I succeeded in marking two of the drives as faulty, and the re-adding them as spare.
Now the array is (logically) no longer able to start:
mdadm: Not enough devices to start the array.Degraded and can't create RAID ,auto stop RAID [md1]
I was able to examine the disks though:
Code:
root@127.0.0.1:/etc# mdadm --examine /dev/sdb2
/dev/sdb2:
Magic : a92b4efc
Version : 00.90.00
code....
Code:
mdadm --create --assume-clean --level=5 --raid-devices=4 /dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2
As I don't want to ruin the maybe small chance I have left to rescue my data, I would like to hear the input of this wise community.
View 4 Replies
View Related
Jan 1, 2011
I have a pretty huge (16x1TB disks) RAID6 LVM array on a Red Hat box which has really thrown a spanner in its works and I'm in a right fix: I was part-way through rebuilding the array with one replacement disk when a second died and a third seemed to have fallen from the array. I was replacing a disk which had been showing signs through SMART of probable failure (uncorrectable errors) and I noticed the second disk was just starting to give similar but slightly less numerous errors.
Now my logic based on a gradually growing understanding of the workings of the LVM is that I stand a chance of resurrecting things as the data held on the machine has been static for a while (a few days) before my attempted drive replacement and none of the disks have actually FAILED.
I have replaced the unit I removed so the physical devices are as they were before the exercise. I clearly need to carefully convince the configuration that it's "how it was" and there are a few meta-data files in the /etc/lvm/archive I believe I can use to re-"set the scene". Presently the machine fails to boot completely and it's patiently waiting in single-user mode for my next visit.
View 3 Replies
View Related
Jun 18, 2010
I have a fileserver which is running Ubuntu Server 6.10. I had a RAID5 array consisting of the following disks:
Code:
/dev/sda1
/dev/sdb1
/dev/sdd1
/dev/md0 -
the raid drive for the above three disks. The sda1 disk has failed and the array is running on 2 of 3 disks
/dev/sdc (OS disk)
/dev/sde (new 2tb disk - unused)
/dev/sdf (new 2tb disk - unused)
My plan was to rebuild the array using the two new disks as RAID1. Would the best way to do this be to create a new RAID1 disk on /dev/md1 then copy all data over from /dev/md0? Also - this may sound stupid but since all 3 drives in md0 are identical i'm not sure physically which disk is bad. I tried disconnecting each disk one-by-one then rebooting but the system doesn't appear to want to boot without the bad drive connected. I've already failed the disk in the array with mdadm but i'm unsure of how to remove it properly.
View 3 Replies
View Related
Aug 12, 2010
I've got an 8-disk raid-5 setup, and one of the disks failed. I shut the system down, replaced it, and powered the box back on again. Then, I made a catastrophic mistake; I 'failed' and removed the wrong disk (should have been sdj1, and I typed sdk1 by accident). I tried to re-add sdk1 back to the raid array, but it got listed as 'spare'. My raid array is off-line, since I now have 2 disks unavailable.
I know that the data still exists on sdk1, is there any way I can get the raid array to recognise the fact that it's a valid part of the array, and not a spare disk? At least if I can do that, I'll have a degraded but accessible array, and then I can rebuild the array on the properly replaced disk.
View 7 Replies
View Related
Mar 9, 2010
I had a corrupted superblock in my RAID boot drive (/dev/md0), which I fixed with fsck in Recovery Mode.However, after rebooting, the same boot-up problem (hanging for hours) persists.When I re-enter Recovery Mode to examine the boot drive, I found its superblock was corrupted again (which I fixed again using fsck).Is there a proper reboot procedure which is gentle on the boot drive, such that it doesn't corrupt it? Or, is something else amiss
View 1 Replies
View Related
Mar 9, 2010
I had a corrupted superblock in my RAID boot drive (/dev/md0), which I fixed with fsck in Recovery Mode.
However, after rebooting, the same boot-up problem (hanging for hours) persists. When I re-enter Recovery Mode to examine the boot drive, I found its superblock was corrupted again (which I fixed again using fsck).
Is there a proper reboot procedure which is gentle on the boot drive, such that it doesn't corrupt it? Or, is something else amiss?
View 1 Replies
View Related
Jun 24, 2009
I've tried to install Fedora 11, both 32 and 64 on my main machine.It could not install as it stops on the first install window. I've already filed a bug but really haven't seen any feed back yet.The bug has something to do with Anaconda and the Raid array but I really can't tell.
I have an Intel Board (see signature). I am running intel raid software under W7 currently.It works fine. But, I'm wondering, when I attempt to install F!!, is my current raid set-up causing problems? Do I need to get rid of the intel raid software and use a Fedor/Linux raid program to manage the raid array??
View 2 Replies
View Related
Jun 29, 2011
migrate an installed Ubuntu system from a software raid to a hardware raid on the same machine? how would you go about doing so?
View 1 Replies
View Related
Aug 18, 2010
I've got a, as it seems to me, strange problem.I've inadvertently deleted my user from the group admin so I'm in the same situation of a lot of other users (read a lot of messages about it).My problem is that when restarted in recovery mode there is no way I can choose the 'drop to the root shell' or similar in the menu.The menu appears for a second and then I've got an empty screen. If I press a key I've been requested for a username and password that of course is not what I need.
View 2 Replies
View Related
Mar 17, 2010
I just did a fresh install of Fedora 11 and added Raid 1 following this tutorial: [URL]
Now I see the filesystem when I open 'Computer' in the GUI, and I open it and see 'lost+found', but i can't write to the drive. The option is simply greyed out. And when I view Properties on the drive and go to Permissions, it says 'The permissions of {driveid} could not be determined.'
View 1 Replies
View Related
Mar 20, 2010
i cant find any threds in this forum how to make raid 5 on fedora core 10 how to make 1?
View 1 Replies
View Related
Jan 6, 2011
1st I am relatively new to linux (but not to *nix). I have 4 disks assembled in the following intel ahci bios fake raid arrays:
2x320GB RAID1 - used for operating systems md126
2x1TB RAID1 - used for data md125
I have used the raid of size 320GB to install my operating system and the second raid I didn't even select during the installation of Fedora 14. After successful partitioning and installation of Fedora, I tried to make the second array available, it was possible to make it visible in linux with mdadm --assembe --scan , after that I created one maximum size partition and 1 maximum size ext4 filesystem in it. Mounted, and used it. After restart - a few I/O errors during boot regarding md125 + inability to mount the filesystem on it and dropped into repair shell. I commented the filesystem in fstab and it booted. To my surprise, the array was marked as "auto read only":
[Code]...
and the partition in it was not available as device special file in /dev:
[Code]...
View 1 Replies
View Related
Dec 9, 2009
I was working on a ppt file for a whole day and I am sure I saved my modifications several times. The next day, when I oppened the file, openOffice did not ask me for any recovery, but I lost many modifications. This is really strange. Does any one know a solution for recovery? I am in fedora 10.
View 5 Replies
View Related
Feb 4, 2011
I have a fedora file server with a raid 1 array acting as a NAS for my local network. I accidentally overwritten a file that I need to recovery. What are my chances of recovering this file?
View 2 Replies
View Related
Sep 26, 2009
My computer isn't booting up or logging in, period, and I was wondering if I could run any of those Grub fixes if I downloaded it through the console. Can I run anything online besides yum using the console? I have a 4 gig USB Flash drive if necessary.
View 4 Replies
View Related
Nov 10, 2009
For some reason the fedora grub didnt detect my windows recovery partition (Im on a netbook).How would I go into adding that to grub. Its on /dev/sda2
View 2 Replies
View Related
Nov 23, 2009
Can anyone recommend good file recovery software for Fedora? I accidentally deleted an iPlayer file (not critical) from an NTFS partition. I tried booting into Windows and using Recuva - it can find the file intact (I can see from the file size it's the correct one) but the directory structure is gone and the file is nameless. EDIT: got it back with Recuva in Windows, just needed to run Recuva as admin.
View 2 Replies
View Related
Jan 17, 2010
I'm having an issue with LVM on an external USB drive. When booting, the system drops into a recovery console if the external drive is not powered on because it cannot find the volume group and members. The setup is one system drive with fedora 12 installed, one internal data drive; LVM volume group vg1 with 5 partitions and one external backup drive LVM volume group vg2 with 5 partitions. Both the data drive and external backup are the same size and identical layout.
I use an rsync script that I wrote to execute backups (mirroring actually).
fstab is set 'noauto' on the external partitions.
I am new to LVM and I'm stumped as how to make the system 'ignore' the external drive at boot, if not powered on.
View 1 Replies
View Related
Sep 20, 2010
It's my first time i switched to linux (fedora13) and i wanted to check out ubuntu10. Started installation but somehow (stupid!) selected not the right harddrive to install new system from an iso dvd. Well installation was not successfull, because not the right drive was selected.I came back to fedora but my "storage" harddrive that i had all my collected data and projects is lost. Basically it's like new formated and some files from the ubuntu 10 are on it. None of my files. Is there any way to recover it back? I don't even have a clue how do you install software to fedora13?(I'm a newbee that was sick and tired using and upgrading windows - so now mac OZ and linux)
View 7 Replies
View Related
Aug 13, 2010
I have installed RHEL5 in My Pc. Is it possible to create Recovery Disc's for my Loaded OS? If Yes, are there any tools to create Recovery Discs or any other methods?
View 5 Replies
View Related
Jul 29, 2009
I am new to Fedora. I know my top probably already been posted somewhere but I just could not find it. I just installed Fedora 11. But my root password does not work (I guess was my fault to type wrong in the first place or some type of short term memory lost). I looked at the root password recovery procedure which involves select single user at GRUB page when booting. But for some reasons, Fedora 11 does not boot into GRUB. I tried Alt+CTRL+F1, F1 or Shift, none of those gives me Grub screen.
View 5 Replies
View Related
Jun 26, 2009
I have Fedora Core 4 PPTP server (poptop) that died (motherboard). I am setting up a replacement system but need to get the data off of the drive from the dead FC4 system. They are just plain text config files. So I removed the drive and mounted it to another system using a USB enclosure. But I can't mount of the root partition, only the boot partition. I have done some Googling and see that the reason is that the / partition is an LVM format. But of course the replacement system already has a /dev/logvol..... type of partition defined. So how can I mount the LVM partition from the dead system on the new system to get the data? Understanding this will be valuable for similar situations in the future.
View 4 Replies
View Related
Nov 16, 2010
Is there any way to recover an overwritten linux file? I uncompresed a tar file which overwrote some of my files. I read somewhere you can umount your home directory.
View 2 Replies
View Related
Sep 15, 2010
I logged in recovery mode via grub, it shows several options: like, resume normal boot
When I enter the resume normal boot it shows something like this:
xxx login:
password:
And I entered my root password which I need for the command "sudo -i". But it shows incorrect password, why is it so?
Same thing happens with dpkg option also? Why is it so, I dont have any other passwords for my machine?
View 3 Replies
View Related
Feb 10, 2010
While install Ubuntu on an existing xp pro I accidentally formatted my hard disk. Is there any way to get back my files it contains e books pdfs photos music files and movies. Data recovery. My Hard Disk 80GB SCSI NTFS.
View 2 Replies
View Related
Sep 2, 2010
I am trying to run boot up in recovery mode in Lucid Lynx 10.04 on a Dell XPS M170. When it gets to [1107.134155][drm] nouveau 0000:01:00.0: GPU lockup-switching to software fbcom, it stops and freezes up and will go no further.
What does this mean and is there a fix?
View 1 Replies
View Related
Mar 21, 2010
some good websites or sources from where I can get recovery algorithms for GPFS(General Paralle File Sytem)..an IBM product?
View 1 Replies
View Related
Apr 24, 2010
My laptop died. I was running FC11. I have taken my harddrive out and connected it to an usb-adaptor and mounted it on my FC11 desktop. However, when I open it all I see is grub. Palimpsest sees both the 250MB of grub and efi etc., and it also sees 120GB of LVM2. I cannot however access any of my data.
View 2 Replies
View Related
Jun 28, 2010
I was installing ubuntu and somehow formatted the D partition on my hdd. I have installed testdisk and have been running quick search and deep search. Testdisk found my partition as a NTFS (I used windows vista). When I press P to list files, testdisk gives me the following message: Cant open filesystem. Filesystem seems damaged.Is it possible to recover any data from the partition or is it lost?
View 2 Replies
View Related
