Software :: Add Partition To Software Raid 1 - /dev/sda1 And /dev/sdb1 Do Not Exist ?
Mar 1, 2010
I have just installed a new version of fedora 12 64bit and have setup the following drive configuration -
Code:
But for some reason I am getting dm-1 and dm-3.
How can I change the array so it contains the normal /dev/sda and /dev/sdb disks and partitions?
Why is the system telling me my drives are dm devices? I have no bios raid features on the motherboard.
How do I use md-1 and md-3 partitions?
How do I go back to the traditional /dev/sda and /dev/sdb devices?
By the way the system tells me that /dev/sda1 and /dev/sdb1 do not exist.
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Jun 16, 2010
I have 2 hard disks, one is full and I would like to move my /usr directory from sda1 to sdb1.
I tried the following..
sudo mkdir /driveb
sudo mount /sdb1 /driveb
cd /driveb
sudo mkdir /usr
sudo cp -b --copy-contents -r /usr /driveb/usr
code....
I don't fully understand the difference between a directory and a mount point and I may be treating them wrong.
I would like /usr to point to sdb.
is it possible, or should I try to change my path instead and ignore this problem?
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Nov 30, 2010
Here is the output of disk free space
# df -k
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00 940287756 3320512 888432924 1% /
/dev/sda1 101086 21142 74725 23% /boot
tmpfs 7730504 0 7730504 0% /dev/shm
/dev/sdb1 2884158292 74736 273757667 1% /data
Now,I wanna add a large amount of memory in sdb1 to sda1 to increase the available memory.Is there a way I can do this?
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Jun 6, 2011
I had a working Ubuntu 9.10 with Windows 7 installed, and i was writing an image of IPCOP [URL] to the USB drive incorrectly, i did mkfs on my primary partation i.e. /dev/sda1 now i am trapped in situation, i was trying to write and usb-hdd image of ipcop on USB Drive, while doing so, i have given following commands
1. mkfs.vfat /dev/sda1
2. e2label usb-pen
3. zcat filename > /dev/sda1
* now the stupid thing i have done, is given /sda1( My HDD ) instead of /sdb1 (USB Drive), it has successfully loaded IPCOP bootable on my primary drive, and my laptop is not working now.
Laptop Partation Info:
/dev/sda1 - NTFS (Windows 7 Prof)
/dev/sda2 - NTFS
[code].....
now i want to get my partitions & data back, if anybody have idea about how to get rid of this situation. The good thing i have done, is that, i didn't tried to install anything on the drive after this happened, with hopes that i can get my data back i guess that it can be recovered but confusion is that, which data recovery software to use, and for linux or windows, as i had my data on NTFS filesystem and currently there is Free Space and EXT4 partition.
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May 31, 2011
I've been having some problems w/ a my RAID 5 array, and after extensive investigation, I'm fairly sure that my last resort is rebuilding the array. I'd tried --assemble, b/c it's a previously created array, but it didn't seem to like that. So, I checked into --create, and it will re-create the array w/out destroying the data, if the superblocks are persistent, which they seem to be. However, here's what I get:
[Code]....
My question is: why do /dev/sdb1 and /dev/sdi1 show as both ext2fs and also as part of a RAID array?
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Mar 2, 2011
I got two harddisks, sda and sdb. Is it possible to install Debian root into software raid partitions sda2 and sdb1 leaving all other partitions 'normal' (not-raid)? do partitions sda2 and sdb1 need to be exact same size and position?
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Aug 22, 2010
have set up a server with OS on a 250GB disk (sdd) and 3x 1.5TB drives for a RAID5 storage setup (sda, sdb and sdc).Using webmin I can delete and create a primary partition in each one. But while I can also format sda and sdc, it refuses to do sdb for some reason:Executing command mkfs -t ext4 /dev/sdb1 ; partprobe ..mke2fs 1.41.11 (14-Mar-2010)
/dev/sdb1 is apparently in use by the system; will not make a filesystem here!
But I'm not using it
simon@ubuntu:~$ lsof | grep /dev/sdb
simon@ubuntu:~$ lsof | grep /dev/sdb1
[code]....
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Feb 26, 2011
I turned on my laptop today and noticed a load of unfamiliar startup text so I knew something was wrong. Now whenever I startup my laptop, GRUB loads fine but when I try to start Ubuntu it says the following:
Quote:
mount : mounting /dev on /root/dev failed : No such file or directory
mount : mounting /sys on /root/sys failed : No such file or directory
mount : mounting /proc on /root/proc failed : No such file or directory
[code]....
so all I'm left with is this BusyBox command prompt. I'm on a live Ubuntu CD right now and if I try to mount /dev/sda1 either in the terminal (with the mount command) or with the GUI it just gets stuck.
Quote:
This will provide you with a list of your drives and partitions, you need to pick the one that your root file system is installed to, it will be something like /dev/sda1 but in my case I can't even mount /dev/sda1. When I run sudo fdisk -l heres what I get
Quote:
ubuntu@ubuntu:~$ sudo fdisk -l
Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
[code]...
thats weird because I rebooted with a live Ubuntu CD and didn't even try to mount /dev/sda1 this time. The instructions were to then try to mount the drive from the GUI so heres what happens when I do that: it attempted to mount it for about a minute then gave me this error message When I tried again heres the error it gave me The problem seems to be that /dev/sda1 can't be mounted for some reason.
I don't know what that error message means and I don't know what else I can do to further diagnose /dev/sda1 and find out why it can't be mounted. Ordinarily I'd just reinstall Ubuntu but I have a couple of lab reports that I had saved on that partition so I'm in trouble if I can't figure out how to access the partition.
EDIT: At the end of that other thread someone recommends to use testdisk to recover the data from the partition. All I really need to do is get those lab reports back but I had them saved inside a Windows 7 guest on Virtual Box. Will this complicate matters a lot for me?
UPDATE: I tried to reinstall Ubuntu and it wouldn't work. Seems this is a bigger problem than I suspected. Does this mean my harddrive is corrupted? I can still use the Windows 7 partition but I take it that the Ubuntu installer not working is a bad sign.
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Nov 9, 2009
I have a question about LVM. My /dev/sda disk is partitioned into Windows NTFS on sda1, Linux /boot partition on sda2, and the Fedora 10 root (/) LVM partition is on sda3. I have moved my Windows XP to VMware on the Linux system and would like to add the sda1 partition to root LVM group.
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Jun 27, 2010
I have installed oracle enterprise linux on VM ware with 20 gb allocated to guest OS. Now I want to install oracle apps in the guest Os, so I need to extend the volume. I have extended in Vm , but I have to partition in the guest OS, for that purpose I am using Gparted. But I am unable to extend to sda1. I need to have all the unallocation space allocated to sda1. Here is the screen shot, how can I do that. Right now when in press the command df -h in terminal I am gettig 18 gb as space available for sda1, I want to make it 200 gb, in which I would like to install oracle apps. Check out my screen shot.
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Jul 23, 2010
I've dual booted Ubuntu and Windows for years now and I've installed OSx86 on a separate drive which Grub2 picked up automagically and everything has been working great -- except I'm out of space. So I bought a 1.5 TB drive and installed win7 into sda1 (100MB NTFS bootloader for windows) and sda2 (50 GB NTFS windows drive). I now want to install two or three flavors of Linux. I'm thinking Ubuntu 10.04, Debian 5.05, and (if I'm bold enough) gentoo. each in 50GB partitions. I've already partitioned the drive a bit putting a 1.2 TB shared NTFS partition at the end (sda10), and a 2 GB swap parition just before that(sda9) My questions are:
(1) can all my linux distro's share that 2GB swap, or does each need it's own dedicated swap partition (installers generally assume you do)?
(2) can I re-partition space in the middle of the drive without messing with windows(sda1&2) and the shared part. (sda10)?
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Sep 19, 2010
I accidentally removed the partition in my hard drive where my Ubuntu was installed.After restarting my Laptop, I suddenly receive the message saying,
"grub error> partition does not exist.
grub>"
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May 1, 2011
So I am reaching an unfortunate conclusion. I asked this of google and got no straight response so I conclude that it is impossible. taking a look at GParted with my 10.4 boot disk, I see
/dev/sda1 NTFS 74GB boot flag
and
unallocated unformatted 7.84GB no flag
So I assume that that 8gb used to be ubuntu.
In the process of trying to fix things, the computer no longer boots windows.
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May 2, 2010
I have created a logical partition (/dev/sda5) and have formatted it with an ext3 filesystem and given it the label PHOTOS.
# mkfs.ext3 -L PHOTOS /dev/sda5
If I mount it to my /PHOTOS directory manually, it does so correctly. However, when I try to automount, it gives me this message:
# mount -a
mount: special device PHOTOS does not exist
I've entered this line in my fstab file:
PHOTOS/dev/sda5ext3defaults0 0
I'm just not sure what's happening; I've never had trouble mounting a filesystem before. Oh and it's a RHEL 5 installation.
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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.
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Aug 26, 2009
I am trying to partition my server before installing CentOS and cPanel.I have hardware RAID 1/10 On RAID 1 I would have
/
/boot
On RAID 10 I would have
/tmp
/usr
/var
/var/log
2 GB swap
/home
Is it correct partionining setup?What should I have on RAID 10 ?
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Mar 1, 2010
I have just installed a new version of fedora 12 64bit and have setup the following drive configuration -
Code:
But for some reason I am getting dm-1 and dm-3.
How can I change the array so it contains the normal /dev/sda and /dev/sdb disks and partitions?
Why is the system telling me my drives are dm devices? I have no bios raid features on the motherboard.
How do I use md-1 and md-3 partitions?
How do I go back to the traditional /dev/sda and /dev/sdb devices?
By the way the system tells me that /dev/sda1 and /dev/sdb1 do not exist.
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Feb 11, 2010
I have two hard drives inside an Ubuntu 9.10 machine, each with a data partition on. What I want to do is as I save files to one data partition partition (or delete them) I want the files copying/deleted automatically on the the other data partition. I do not want to start using RAID or end-of-day incremental backups.
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Sep 6, 2010
How do I recreate an LVM raid 1 partition, without destroying data on the discs? I have a 650GB data partition which is a raid 1 array with ext3. Two days ago, the system (Ubuntu 9.04) started to refuse to write to it, claiming no space left on device - even if there is ca. 102GB free left, if the disk is 85% full (according to df)! Interestingly, removing a couple of GB did not help, after reboot the disk was again full..
I did the "tune2fs -m 0" trick and then forced file check on next reboot by "sudo touch /forcefsck" .. and the result is that the raid partition is gone. I have the two physical drives /dev/sd*, unmounted, but the /dev/md1 is no longer there. What can I do to re-create it, without losing the data? I realized that I ran tune2fs on the physical partitions /dev/sd* - was I supposed to run it on /dev/md1?
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Mar 1, 2010
I have just installed a new version of fedora 12 64bit and have setup the following drive configuration -
Code: [root@fedora ~]# cat /proc/mdstat
Personalities : [raid1]
md2 : active raid1 sdc1[0] sdd1[1]
312568576 blocks [2/2] [UU]
[Code]....
but for some reason I am getting dm-1 and dm-3.
How can I change the array so it contains the normal /dev/sda and /dev/sdb disks and partitions?
Why is the system telling me my drives are dm devices? I have no bios raid features on the motherboard.
How do I use md-1 and md-3 partitions?
How do I go back to the traditional /dev/sda and /dev/sdb devices?
By the way the system tells me that /dev/sda1 and /dev/sdb1 do not exist.
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Jun 22, 2011
I'd like to set up RAID for my data partition.
My data are in /dev/sda5 (ext3).
There's an empty partition /dev/sdb5 (ext3).
I want /dev/sdb5 to be a mirror image of /dev/sda5, the command to invoke should be :
mdadm --create /dev/md0 --level=mirror --raid-devices=2 /dev/sda5 /dev/sdb5
My question is : how to ensure that the synchronization is done by copying data to the empty space and not the converse ?
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Dec 21, 2015
Have a new debian install on a asus h170m-plus (was going to use ubuntu but didnt support the hardware/software combo i needed)
Install is fine. but during install it didnt see my 1tb raid1 drive..
after reboot, debain boots great, and i can mount the raid drive in the file manager.
I can see it and in mtab it shows up :
"/dev/md126 /media/user/50666249-947c-4e8f-8f56-556b713a6b6a ext4 rw,nosuid,nodev,relatime,data=ordered 0 0"
How can I permanently add this mount point so it is found at boot up at /data...
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Jun 9, 2011
After an install of suse 11.4, one of my drives raid 0 (ichr9 intel) does not mount and is not recognized as being formatted in NTSF, while the other unit raid 0 (ichr9) is recognized without problems?
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Jul 16, 2010
The ext4 file system creation in partition #1 of Serial ATA RAID isw_fjidifbhi_Volume0 (mirror) failed. Not sure what's wrong? How do I solve this? This happens after I enter my login details and click next. Then it fails on the install screen with this error.
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Jul 16, 2010
Been attempting to install ubuntu on my Intel fake raid on a new PC.The installer sees the raid, but errors out:Quote:The ext4 file system creation in partition #1 of Serial ATA RAID isw_ehbgbddej_Volume0 (mirror) failed.This seem to be the EXACT issue described in this bug report:I read all the way down this bug report, and at the bottom it says:Quote:Launchpad Janitor on 2010-06-25Changed in parted (Ubuntu Lucid):status: Fix Committed → Fix ReleasedA few weeks ago, a fix was "committed" and "released". I had been working with an earlier 10.04 ISO, so I downloaded 10.04 from the web site today. Still the same problem.Maybe I'm just reading the bug report wrong? If it says the fix is committed and released, I would naively assume that it is fixed. Do I need to patch to apply the fix or something? Doesn't seem likely.
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Apr 4, 2011
I am unable to hibernate my computer while using Ubuntu and I figured out the reason--Ubuntu is not using my swap partition. I would follow the existing tutorials on setting up a swap partition after installing Ubuntu, but since the volume uses hardware RAID 0, the swap partition is not assigned a /dev/ entry (like /dev/sdxx) and I am not sure how I can mount it.
Here is what I have:
Code:
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May 13, 2011
I am trying to grow my array to make full use of my drives. I have a raid 6 using mdadm on my home server. The array used to consist of 6 1.5TB drives when it was created. Since then I've been replacing the 1.5TB drives with new 2TB drives. And now I have replaced the last 2 drives.
When I added the first 3 disks I did not use the whole disk for the raid partition but rather made it the same size as the 1.5 partitions. As it turns out this may have been a bad idea. (But it gave me another 3 partitions of 500GB that I turned into 1 disk using mhddfs.)
Now I'm trying to grow the array. I've been testing in a virtual enviroment on how to do it but I cannot find another method than this :
1) fail 1 disk.
2) re-partition the disk with the size of the whole disk.
3) re-add the drive as a spare.
4) start the now degraded array to let it resync.
5) wait quite a while. (aprox 5 hours)
6) start again from step 1 for the other disks.
7) use mdadm with grow command to enlarge the array
use resize2fs to fill array to max size
Now although since this is a raid 6, I keep some redundancy but I still worry about degrading the array so manny times and rebuilding the whole thing. I mean I read the thing out 3 or 4 times over doing this.
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Sep 1, 2011
Quote:
EFI GUID Partition support works on both 32bit and 64bit platforms. You must include GPT support in kernel in order to use GPT. If you don't include GPT support in Linux kernel, after rebooting the server, the file system will no longer be mountable or the GPT table will get corrupted. By default Redhat Enterprise Linux / CentOS comes with GPT kernel support. However, *******if you are using Debian or Ubuntu Linux,******** you need to recompile the kernel. Set CONFIG_EFI_PARTITION to y to compile this feature.
Is this true? Ubuntu has no GPT support native to the server install? Never compiled a kernel. Is that of itself going to be a mind bender? How much doo doo am I going to get into if I haven't done it a few times? Trust me when I tell you its no thrill formatting and reformatting a 8tb raid drive or the individual disks if it screws up. Been on that ride way too long already. Need things to go smoothly. This is not a play toy server, but will be used in a business.
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Mar 11, 2010
I have 4 hard disks. 2 pair of RAID 1 (mirror). Both use the same RAID controller - Intel Marvell.When I boot, this is what is listed in /dev/mapper/:
Code:
crw-rw---- 1 root root 10, 59 2010-03-11 20:58 control
brw------- 1 root root 252, 0 2010-03-11 20:58 isw_bbjfjjdcg_Volume0
[code]...
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Feb 11, 2010
The RAID level 1 interested me because of its redundancy in both drives. And I successfully made it in a couple of partitions. But, I always did it after Linux installation. Then, I create both partitions, use 'mdadm' to create raidtab and RAID device (md0, for example) and then I format the RAID device with 'mkfs' and mount it.
Until there, it's all OK.
But my problem is to mirror ALL the hard disk, inclusive root partition. To do that, I guess I need no Linux installation, then create the RAID (md0, raidtab, etc) and after that install Linux in RAID device created.
But I'm new in Linux world and I have no idea how to do that.
I use Debian Lenny, so I need a solution that uses only the first DVD of this distribution.
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