where is uuid of partitions of raid0?
My box is centos 5.4 x86, and dual booting with windows 7. I need to make a ext3 partition between ntfs partition 2 and 3.
After making this ext prtition, I need uuid of this ext partition.
What would be the best way list disk and partitions in the fstab file?
View 1 Replies View RelatedI have two encrypted partitions which I cannot find UUID numbers for.
/etc/crypttab looks like this:
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and *sometimes this works, other times I have to edit the file and /etc/init.d/cryptdisks restart.
Obviously I should use UUIDs here and in fstab but blkid does not list those partitions
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I have a mounting rack in which I try to plug in various HDDs. Now, all of them have vfat. Blkid returns something like:
/dev/sda7: UUID="4B16-F1E8" TYPE="vfat" The UUID looks abnormally short to me. I found no way to obtain a longer, typical UUID, and when I set Yast2 partitioner to mount by UUID, it sees and it successfully uses the short UUID. Yast2 even adds it to /etc/fstab like this: UUID=4B16-F1E8 /windows/C vfat users,gid=users,umask=0002,utf8=true 0 0 However, this short UUID is useless in /etc/fstab. It doesn't work at boot time and it doesn't work when I try to mount manually. xxxxx:~ # mount /windows/C mount: special device UUID=4B16-F1E8 does not exist. Also, one cannot find these short UUIDs in /dev/disk/by-id/.
For a billion reasons, I really want to mount these FAT32 partitions by UUID. Do I have any way to do it?
I administer a small network of computers connected to a windows 2003 server. The machines Dual boot Windows XP and CentOS 5.
My question is this. The machines are being upgraded to HP Z800 workstations. These workstations come with 2 1TB drives setup on a hardware RAID0. Can I install Linux on these machines, using the RAID0? Can I do an install as if it was just one hard drive? The machines came with Windows7 and I'd like to keep it intact including the RAID0. Can I do the install where it resizes the partition, adding the linux partition to the "drive".
If I can't use the existing windows RAID0 to install CentOS I was thinking of just installing another hard drive in the machines for it. This brings up another question, what would happen if I moved my Linux drive from one of the old workstations and put it in the new workstation, would it boot? I know windows wont boot like this because of the hdd controller drivers and I have a sneaky work around for this anyway but am not wanting to transfer the windows installation.
I couldn't post in General. It said I had insufficient permissions to post there, so, this post does have to do with Windows slightly. Sorry that it's here, but I DID read the rules (I searched, and couldn't find an answer to my problem either)
Anyways, I have a RAID5 array 2.72TB (4x1TB drives) which I used in my windows installation, initialized as GPT, and I used "span" to make the single 2TB partition, and 720GB partition into one partition. I believe that Windows created a software RAID0. Ok, so now I've made the leap away from windows, and am going 100% into Linux (Debian, to be exact) and I'm trying to figure out how to mount this array. I've only done basic web/ftp/ircd server management on Linux before, and never anything with mounting drives. I'm a complete n00b at this stuff.
I have gone over the thread "Learn The DD Command Revised" (It was Fantastic) in the search for a solution to my query.
I have seen posted elsewhere that this code is supposed to be able to change the UUID number of NTFS partitions (useful when multi-booting with Grub2 and cloning partitions). Here is the code:
Code:
sudo dd if=/dev/urandom bs=80 count=1 | xxd -l 80 -c 8 | tail -1 | xxd -r - /dev/sda1
This is assuming that I want to change the UUID on the 1st partition on the 1st hard drive >>>sda1<<<
If I was trying to modify the 2nd partition on the 1st hard drive it would be >>>sda2<<<
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NOTE: I was doing this while booting from Ubuntu's Live CD version 10.04.1 LTS (In case that is a factor)
Someone (not me) recently installed some new distros on my HD. It seems that during the installation my swap partition was reformatted and a new UUID was assigned to it. I have the following questions:
1. I know that I have to change the swap partition UUID in /etc/fstab and /boot/grub/menu.lst of the affected distros. Is there anything else that needs to be changed?
2. I presume a similar change has to be made to the Grub 2 configuration, for those distros that use Grub 2. I have no experience using Grub 2 so how do I make the change or where can I find instructions to do it?
Fstab:
UUID = A / ext4 defaults 1 1
UUID = B /stor ext4 defaults 1 2
UUID = C swap swap defaults 0 0
and the error is:
fsck.ext4: Unable to resolve UUID = B.
Fdisk -l:
/dev/sda1 (boot) linux
/dev/sda2 linux swap solaris
/dev/sda3 linux
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Simple. UUID is apparently limited to a single UUID to be defined. Example UUID="DEB0-0001","3338-3164" separated with a comma is not working.
What could be the linux alternatives for pluging several UUID disks? How to bypass when there is a CF card and a reader box, since blkid gives no UUID ?
Code:
UUID="DEB0-0001" /media/pendrive vfat users,rw,noauto,umask=0000,uid=1000,gid=1000 0 0
#UUID="3338-3164" /media/pendrive vfat users,rw,noauto 0 0
#TYPE="vfat" /media/pendrive vfat users,rw,noauto 0 0
I realized that my understanding of UUIDs in Linux to specifying hard disk partitions may be erroneous.
The proverbial wisdom is that one should not use hard-coded device specifications in fstab and in the boot menu.lst, such as /dev/sda1 etc. The reason normally given is that if hard disk order changes or the order of partitions change, then the entries will be incorrect since they are hardcoded to partitions following a specific order.
So my understanding was that using hard disk labels, in the form of LABEL=xxxx, or UUIDs in the form of UUID=some-uuid, would prevent these problems when disk order or partition order changed.
I decided to avoid the use of LABEL in case I wanted to change the LABEL on a partition to make the names of partitions more easily identifiable. I then thought that UUID was ideal since it never changed for a partition no matter even if I moved that partition to another drive or added another hard drive and thus changes the order of hard drives on my computer. I essentially thought that once UUID was determined for a partition, it never changed but was somehow part of the partition in the hardware of my computer.
Then I became curious of how a UUID was determined. I did this because I often make backups of partitions on external SATA drives and wanted to make sure that somehow the backup would not duplicate whatever Linux considers the UUID of a partition and present a Linux distribution with two UUIDS which are somehow the same and therefore confuse the Linux distribution to the point that I could not use it. I am aware that UUID means a unique id, but I wanted to make sure I understand how that unique id is determined in Linux. This is especially true since the tool I use to make backups of an entire partition is a Windows application, and not a Linux application, and I wanted to make sure that the backup partition UUID would not duplicate that of an existing partition.
In my very brief research in how a UUID is generated under Linux it appears that it is not something that is part of the hardware of the partition itself but rather a number generated by some parameters of the partition, one of which is the partition order.
If it is, it means to me that if I move a partition from one place to another, even on the same hard drive, or to another hard drive, a Linux distribution will no longer find the partition based on the UUID. In that case it seems as if the UUID is subject to the same weakness as the device specification in fstab and menu.lst in that the order of a partition or the placement of a partition on a particular hard drive will cause the designation to no longer refer to the same partition. In which case it appears to me that only the LABEL parameter is not subject to this weakness and as long as I keep distinct labels for all partitions on my hard drive I could theoretically move them around at will and a Linux distribution will find them correctly. I am aware of course that my computer must always find the boot partition to be able to boot a Linux distribution, so moving Linux parttions where I want them is subject to the ability of my computer to find them from the MBR of my hard drives. But in the main it now appears to me that the best way to insure that moving partitions does not keep a Linux distribution from botting correctly is to use LABEL, and not UUID, in fstab and menu.lst, and of course to make sure that if I decide to change the LABEL of a partition that I must change its entry in fstab and possibly menu.lst before rebooting that distribution.
If I have been wrong in my latest surmises I would appreciate being corrected, as the information I found on UUIDs and how they are generated may not be correct. Also if there is more exact information on exactly how partition UUIDs are generated in Linux I would appreciating anyone pointing it out to me.
I've got the latest version of Ubuntu on my machine.My Linux partition is ext4, so I need to use a Linux boot loader capable of booting from ext4.Also, I want to be able to use the UUID of my partition instead of specifying "/dev/sda3".Right now I'm using the Grub2 (or whatever the f*** it's called) that comes with Ubuntu. It's the ugliest boot loader you'll ever see, the configuration file is disgusting.So with that in mind, I'd like to change boot loader.Lilo would be OK but I can't seem to get it to boot from ext4.The older version of Grub was fine too but again I don't think it can boot from ext4.
View 2 Replies View RelatedI deciphered that I would have to change the /etc/fstab and grub.conf.
So the question is:
1: Which files must I edit?
2: How do I edit grub.conf to use the sdX scheme?
Using Linux, I have several backup levels. One of them is a periodical sector by sector copy (using dd) of my laptop harddisk to an external USB disk. Yes, I have other backups too, like remote rsync. This approach (the disk dd) is OK when cloning a HDD with no LVM volumes, since I can plug the external disk anytime and mount the partitions simply mounting /dev/sdb* instead of /dev/sda*. Trivial and handy.
Today I moved ALL my harddisk (including the /boot) to LVM. Everything works fine. I will stress it for a couple of days, and then I will do a sector by sector copy to my external harddisk. Now I have a problem, I guess.
If in the future I plug the external USB HDD to recover any file, the OS will detect a duplicate LVM configuration, with the same name and the same UUID. Even doing a vgrename (which LVM would be renamed, the internal HDD or the external HDD?), the cloned UUID will not change. Is there any command to change name and UUID? Ideally I would clone the HDD and then change the LVM group name and its UUID, but I don't know how to do it. Another related issue would be... In the past I have booted my laptop using the external disk, using the BIOS boot menu and changing GRUB entries manually to boot from /dev/sdb instead of /dev/sda. But now my current GRUB configuration boots directly from a LVM logical volume, something like: set root='(LVM-root)' in my grub.cfg. So... What is going to happen with duplicated volumes?
I need a command to display the next info from my hdd:
device name - filesystem - uuid - mount point
I found blkid but the mount point is not displayed, I've already look in man but there is no parameter for that
When we install a linux OS, we've an option to create partitions. In my laptop I've create partition for /opt, /home, / and /tmp. Are these partitions the same type of partitions as the partitions created by LVM?
View 1 Replies View RelatedI had windows and ubuntu for some time, the other day I had an issue with (msconfig). The easiest way to fix it is to fresh install windows. So I wanted to boot into ubuntu, take my windows files and toss them onto a external drive. So this is were I need help. I have 3 hard drives, 2 internal and 1 external. The 2 internal drives are 2 500 gig WD's in raid0. I can not find out how to retrieve my data from these drives at all. I can get the partition manager to tell me I have them, but I can not find them anywhere let alone get data off. And I have my work for my 10 page research paper on there and I should be working on it but have not been able to retrieve the work and put it on my laptop.
View 5 Replies View RelatedIm trying to set up two raptors (identical) with RAID-0 using Silicon Image.
The drives arent being detected by linux. I have the linux drivers on USB but unsure on where to install them. There is no option available...
The drives are being detected on computer start up..and were working with windows...
Havent tried a diff distro as can get my hands on one.
Motherboard is a A8N-Sli Deluxe.
I'm an experienced PC technician running a slackware 13.1 distro on a server at home. I've currently got 2x 1TB drives in the box allocated as raid1 for the OS and everything I want to run on the machine. I'd like to think my question/needs are fairly straight forward, I am buying 2x 2TB drives to add to this machine as it serves as a NAS box for one of its roles. I'd like these in raid0 as the data that would be going on it is not that important to me. The question is, after adding the new drives to the system, once I boot up, what do I need to do to the system to get the drives added and working sucessfully as a single raid0 volume that I can then samba share out to my network. To clarify, I understand a little of mdadm as I've used it to raid1 my existing setup when I installed, and I'm fine with the samba bit after.
View 5 Replies View RelatedI just have a few questions about LVM and RAIDs. It seems they are basically the same thing. Is this correct? I can add two drives together on both of them and it appears as a larger drive, along with other setups like raid1 and raid5, etc.. And is there a difference in performance between them?
And my second question.. I know one is stripped and one is not, but is the performance between a raid1 and a raid0 the same? I've been told that raid1 is faster than raid0 because the data is written twice.. and therefore can be read from two different disks which equals faster read speed, but slower write speed since it writes to the two.
Because of all the trouble with the asrock 939SLi-eSATA2 (see my previous unsolved thread) I have bought a new MSI 790FX-GD70 mobo + processor +ram3 memory and shifted my MSI K9N2-platinum to the asrock box and mothballed the asrock mobo. A rigorous way to solve the problem, but it turned out to be the beginning of more severe trouble. When I try to install Fedora on the striped disks at first everything looks good. Both gparted and the installer see the linux device mapper partitions on the raid config + the unused space.But if I tell the installer to use the unused space, a mere 150 gig, then it tells me:
Could not allocate requested partitions: not enough free space on the disks. The same happens if I try the custom layout. When I start with a small 200 mB ext3 boot partition the same message appears.The ubuntu live cd with dmraid installed and the ubuntu alternate cd do not even see the devmapper partitions. Is the AMD-ATI chip on this new mobo not properly supported by Fedora/Ubuntu?
I want to run Fedora 12 x86_64 on my 2x500GB RAID0 setup, how would I do this via the BIOS method (I want to dual boot Win7 off the same RAID array) with an AMD SB750 southbridge? I'd prefer not to go software, but if I have to I can and just use the 1TB for 7. (I'd prefer not to as the 1TB is a hotswap drive, mostly from PC to External case)
Note: I don't actually have the 1TB Hard Drive or BluRay drive yet, they're still on order)
I searched, but all the results were for Intel's ICH10R or SB600, computer specs are in sig, if there's anything else just say.
I've already got two installs without much problems.. one on my laptop and another fedora13 install on an older comp just to test it a bit before installing it on my main comp. But now I've got a problem. Both those install went without problems but when I started installation on my main comp first I've noticed some graphic problems when there is installation started and there is mouse and fedora 13 welcome installation screen. there are some like glitches or something no idea how to describe them.. like bad pixels in small upper part of the screen. But ignoring that everything went OK up to the part where I can choose a standard discs or non starts like sans and stuff..
When I choose standard disc installation just freeze there. No idea what is happening. Only this that came across my mind is that there is a problem with raid maybe? There are 2x640Gb HDD in raid0, there is win7 installed, and another 1Tb HDD, non-raid member disk, where I would like to install Fedora and have a dual boot. Still got programs that I need win for I'm afraid. Installation went smooth on laptop and another comp but there is no raid so I'm guessing that could be a problem. This comp where installation froze is in short:
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I used Palimpset to set up a RAID0 arry using the beta of 10.04. I, being the neat freak that I am, like to do a clean install between betas and final releases. So I backed up all my photos and such to that RAID array (this is on my home server/desktop, by the way) and reinstalled (using the final Ubuntu Server 10.04 disk). When I was re-installing, I stupidly created (but didn't format) a new RAID array over the one with my data on it. Now I'm back on the final Ubuntu Server 10.04, and palimpset recognizes that theres a RAID array, but says its unformatted.
View 4 Replies View RelatedI upgraded my 9.10 installation to 10.04 and decided to try out btrfs on a some spare drives in the system.sudo mkfs.btrfs -m raid0 /dev/sdb /dev/sdc /dev/sddthe only way the system sees the btrfs array is by running btrfsctl -a and then mounting /dev/sdc. but that has to be done in userland, not at boot. if i try to mount it via fstab, ubuntu won't load because it can't find the mount point./dev/sdc /Images atasum,thread_pool=128,compress,rw,user 0 0so where am i going wrong? I tried mounting via the UUID also but that didn't seem to work for me either.
View 1 Replies View RelatedI just encountered a huge problem with my PC. It's a Sony VAIO VGC-RC210G with the first two HDDs in a RAID0 configuration. Windows Vista is installed on the RAID and Kubuntu on another HDD.We had a power outage yesterday and the PC was powered on. Vista wouldn't boot, something which I traced to crcdisk.sys (stupid f***ing CRC check)
View 1 Replies View RelatedI am trying to install Ubuntu 10.10 using Wibu inside Windows and installation looks good without any problems but when I select Ubuntu in Boot POST menu after I see Ubuntu Desktop I see error it's saying that Root directory is not specified and there is OK button and if I press it I see same message. only way to get out is to click restart in top right corner. My Windows installation is on RAID0 SSDs and I actually tried to install it on same partition as windows and even tried to install on NEW unallocated and freshly formatted partition. Nothing works. I am thinking to install it from Live CD however in advance formatting on let's say 20gb of space what do i assign ? Like how do I partition it like root directory and swap and other partition i ll need. Like can you specify all I think 3 different partitions I'll need and how much space to allocate for each on let's say 20GB of space.
I remember I had a choice "Use all free space" and it was soo simple I could have windows and some unallocated space on hard drive and Ubuntu would of use it . Now I don't see this option. I see use entire disk ...or advanced where You have to create on unallocated space all parts of partitions needed that's
EDITED: My System info if u need it.
Mobo: Asus P6T Deluxe
CPU: i7 920
RAM: 6GB G.Skill PC1333 cards
BOOT HDD: OCZ Vertex 2 64gb x 2 in RAID0
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Just got 3 extra drives for my machine.
2x160Gb sata
1x 165Gb sata
How do i create a raid0 array of these drives? On each drive i have got a partition whose size is 160GB and formatted to type fd (Raid Autodetect) i have tried the following:
Code:
mdadm --create /dev/md0 --level=0 --raid-devices=3 /dev/sdb1 /dev/sdc1 /dev/sda1
mkfs.ext4 /dev/md0
mount /dev/md0 /media/raid
but for some reason it doesnt work.
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When I set up Ubuntu 10.10 I had only one hdd around so I installed my system with the idea that I will add the 2nd hdd for raid1 later on. Last weekend I wanted to add the hdd, but discovered, that ubuntu created a raid0 array. So I went on and tried different things: removing the 1st hdd from the raid0 array, create a raid1 with two disks, and so on... I finally could syncronize both disks but after a reboot the raid0 array appeared again with only one disk. Now I know, I should have written the mdadm.conf and fstab files... My last tries resulted in a missing superblock. Here is the story:
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I administer a small network of computers connected to a windows 2003 server. The machines Dual boot Windows XP and CentOS 5. My question is this. The machines are being upgraded to HP Z800 workstations. These workstations come with 2 1TB drives setup on a hardware RAID0. Can I install Linux on these machines, using the RAID0? Can I do an install as if it was just one hard drive? The machines came with Windows7 and I'd like to keep it intact including the RAID0. Can I do the install where it resizes the partition, adding the linux partition to the "drive".
If I can't use the existing windows RAID0 to install CentOS I was thinking of just installing another hard drive in the machines for it. This brings up another question, what would happen if I moved my Linux drive from one of the old workstations and put it in the new workstation, would it boot? I know windows wont boot like this because of the hdd controller drivers and I have a sneaky work around for this anyway but am not wanting to transfer the windows installation.