Hardware :: Changes To Fstab (UUID's) / Revert Fstab's Listings Back To The Old /dev/hd Settings?
Jan 15, 2010
I've had two hd's in my box forever. for more space and backup reasons. Well I have started running the Debian Squeeze distro since December. I've had many issues, some are still unresolved. but now I'm running into major headaches with the fstab. Specifically dealing with/wondering why UUID's are used instead of the old /dev/hd? I was a little annoyed when I tried Kubuntu to find /dev/sd? used instead of /dev/hd? but that was workable. But the UUID's are a nightmare. Here's my problem.
My main box is finally giving up the ghost. The mobo is dying. So in order to do some tests I took my hd bundle (my two hard drives with their cables) physically out of the box and temp installed them in a test box. I wanted to do some benchmark and other tests. I got all kinds of errors. I found that the system wasn't recognizing the UUID's listed in fstab. My concern is when the new mobo gets here next week I won't simply be able to plug the hd's in like I always have been and just let Linux reconfigure itself (Debian used to be good about this). I really don't want to have to clean reinstall if it's not needed.
So for this I have two questions. WHY developers decided to drop using /dev/hd? or even /dev/sd? ?
And is it possible to revert fstab's listings back to the old /dev/hd? settings. In debian fstab had lines commented out showing how each partition was listed in it's /dev/hd? status during install.
I'm getting really sick of all these archane changes in ALL aspects of linux that don't seem to have any good explaination or need.
View 4 Replies
ADVERTISEMENT
Jan 5, 2010
What would be the best way list disk and partitions in the fstab file?
View 1 Replies
View Related
Apr 9, 2010
I have a question about mounting partitions. I thought of using UUID or LABEL in fstab and menu.1st Is there an advantage of one over the other?
View 5 Replies
View Related
Nov 25, 2010
For reasons long and unique, I want to disable UUID in my recent Ubuntu 10.4 install, and use the old fashioned /dev/sda1 /dev/sdb3 etc. method. I had this "all fixed" under GRUB (pre-2) on Ubuntu 8.04 and it has served well and bug free for years. (Warning: I use old stable hardware - others may have disasters.) But with GRUB2, the task seems more complicated. (This guide me make the backups I haven't done since the fresh install 2 weeks ago.)
Is the following process complete, necessary, and accurate...
Edit the file /etc/default/grub to remove the # in the line...
#GRUB_DISABLE_LINUX_UUID="true"
... making sure to add the two " if missing .....
Copy nearly the entire /boot/grub/grub.cfg file
into /etc/grub.d/40_custom and then...
Comment out every line that says...
search --no-floppy --fs-uuid --set (etc.)
Change every line that says...
linux /boot/vmlinuz-2.x.yy-zz-generic root=UUID=(etc.) into...
linux /boot/vmlinuz-2.x.yy-zz-generic root=/dev/sda1
Edit /etc/fstab and change every instance of UUID=(etc.)
to the appropriate drive and partition e.g. /dev/sda1
edit /etc/initramfs-tools/conf.d/resume and change RESUME=UUID=(etc.)
into RESUME=/dev/sda1
Run update-grub
Do all the above, every time I do a kernel upgrade. (Is it important to do all the above before or after rebooting for an upgrade?) Am I correct, succinct, and complete in the above process? Any mistakes? Any omissions?
View 3 Replies
View Related
Dec 29, 2010
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
View 3 Replies
View Related
Jan 2, 2010
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.
View 10 Replies
View Related
Jan 31, 2010
all of a sudden my pc decided no to start anymore.YOu might be aware of the ide/sata driver problem, well it was the problem. I reinstalled grub with suse dvd and it went ok. Pc working properly. But then i tried to fix this once for all and changed the fstab options from /dev-by-id to uuid (all partitions : swap, /, /home etc ).Is uuid a definite solution ?Why is the pc not able to start from there ?
Since i moved the partitions with uuid option in fstab and even after reinstalling grub the pc is not starting anymore . It gives me the boot menu (linux suse/failsafe) and then a black screen left with no keyboard nor mouse available.
[Code]...
View 9 Replies
View Related
Nov 13, 2010
is it safe to change fstab UUID entry for the system to /dev/sdb4? and after editing fstab, is there a script or command I need to run to release lock or update mount information? edit: I see not correct, and therefore not safe,but is there a format to tell linux to use /dev/sda1 instead of UUID= or label= .
View 9 Replies
View Related
Dec 15, 2010
UUIDs make fstab hard to read, so.. Is it possible to use udev rules to prevent HDs to change device, instead of using UUID in /etc/fstab?
View 2 Replies
View Related
Jul 8, 2011
I cloned one of my hard drives to another, using Acronis True Image Home 2011.In the process, of course, fstab got copied verbatim from old to new.I then, using a livecd on a flash drive, mounted the new drive, went into fstab and rewrote the UUID's, using the numbers I'd gotten previously by doing sudo blkid.Now, the new drive had the UUID's revealed by that command.Then, I used boot-repair, from yannubuntu, to make that drive bootable, since it wasn't after the cloning and after the fstab rewrite.The drive is bootable, and it's mountable from a flash drive, or from the old drive.
I can access files either way.the fstab file on the new drive still has the old numbers, yet when I ran boot-repair, it apparently changed the UUID's for sectors 1 and 5 on the new drive.fstab seems to be irrelevant at this point, yet everything I read about it indicates that it is not only relevant, but necessary.I don't understand how I can be accessing the drive when the fstab contains UUID's that are no longer pertinent to any hardware on my system.
View 5 Replies
View Related
Jan 19, 2010
I've apparently changed my fstab file and now my boot drive fails to mount. The original file is still there "fstab.BAK". How do I rename the current fstab to another name and rename the fstab.BAK to fstab? Since this is read only in the /etc directory I have not been able to make this happen from a command prompt.
View 9 Replies
View Related
Feb 6, 2010
I run a headless Ubuntu 8.04 server, which acts as a web, email and file server. I am sticking with 8.04 as it is a LTS release and will upgrade to the next LTS when it is released.
I have two external USB drives, that I need to mount at boot. I have been using /etc/fstab up until now, with the following entries:
Code:
However, as I gather from doing searches is quite common, occasionally I get an error during boot (causing the system to drop to a recovery shell) because the USB drives take time to wake up and the system hasn't found them by the time it reads /etc/fstab.
From doing searches, it seems there is nothing you can do to fstab to fix this, so you need to mount them using an rc.local script instead, using:
Code:
The problem is, as I have two USB drives, their /dev/sdxx location changes between boots. I thus want to use UUID codes as I do in fstab, however I haven't found anything about this.
Does anyone know how I can use the mount command and UUID to mount a drive in rc.local and what options I have to use the mount the drive with the same options that I am using in my fstab entry? Obvisouly, I can't refer back to fstab using the mount command, because then I will still get the boot error issue if they are listed in fstab. And there is no space internally for the USB drives as there is already two internal drives.
View 3 Replies
View Related
Jun 28, 2010
I have an SiI hardware SATA RAID card, with two 500GB disks in mirrored RAID configuration. When I first plugged them in and set it up, things seemed to work ok, but on boot the raid controller told me that the RAID needed rebuilding, and it would happen automatically after POST. So I didn't worry about it, and the drive mounted fine, and it's been that way for years. I just went in and manually on-line rebuilt the RAID in the controller's BIOS, and now when I boot into Ubuntu, both disks show up in fdisk, but neither show up in /dev/disk/by-uuid. Am I missing something?
View 9 Replies
View Related
Sep 30, 2010
Is there any (command line) utility that can just take current mounted disk settings and write that to fstab?
View 2 Replies
View Related
Apr 28, 2010
et me know what will be the required settings under /etc/fstab for adding external usb floppy device?
View 3 Replies
View Related
Jan 18, 2010
How can I fix fstab? at each boot, my partitions switch alternatly from sda to sdb and vice versa. Go to past: On my desktop, I've got 2 hdd, 1 ide and 1sata. (Bios priority boot sata) first, I've installed Seven on the hdd ide and diconnected it. Second, I've installed Sid under hdd sata. So after, sda is SID (sata) and sdb is Seven (ide). Since I've reconnected ide hdd, as say above, my partitions switch alternatly from sda to sdb and vice versa. I use Grub2 and UUID, there no move inside these files Is there another file to configure to avoid this?
View 8 Replies
View Related
Sep 2, 2009
I remember automounting my windows drive (I dualboot windows and fedora) using /etc/fstab.
Now I can't find what to add to the file in order to mount my drive.
The drive is /dev/sda2 and I would like to mount it at /mount/windows, it's an NTFS drive.
I have been looking around the forums and reading the manuals but can't figure it out
View 3 Replies
View Related
Sep 13, 2011
I mount a device mount /dev/xvdf /mnt/mongo and verify the mount using df-h:
Filesystem Size Used Avail Use% Mounted on
/dev/xvda1 7.9G 955M 6.9G 12% /
tmpfs 299M 44K 299M 1% /dev/shm
/dev/xvdf 20G 589M 19G 4% /mnt/mongo
But now I'm trying to figure out how to make it auto mount on boot. I understand I need to add a new entry to /etc/fstab, so I perform: $ sed -i '$ a/dev/xvdf /mnt/mongo xfs defaults 1 1' /etc/fstab But, after reboot, it seems that the auto mount didn't work. The device didn't appear in the df -h list.
View 2 Replies
View Related
Apr 23, 2010
I have an external hdd that I have added to the fstab so it will mount when I boot. But every time I add the line to fstab and reboot, it hangs during the boot process and says something about ureadahead-other status 4. here is my line in fstab..
/dev/sdc1 /NAS ext3 defaults 0 0
Is there anything wrong with that? I couldn't remember what fs I chose when I formatted it so I did "sudo parted /dev/sdc print" and it said it was ext3.
View 2 Replies
View Related
May 26, 2010
I upgraded to 10.04 and everything went fine. I had a cd drive fail(wtf?) and took it out, now apparently everything is messed up as far as what is what (sda/b/c/d etc). I've got 2 hard drives, the OS drive was sdb2, with sdb3 /home and sdb1 an ntfs parition. sda1 is /media/disk. sdc0 was the cd drive.
On the next boot up, it was unhappy that something was wrong with the /home partition.(wtf is that, there is no /home "partition", it's /dev/sdb3!), so I was like.. ok just need to go into fstab and re-arrange things. I open up fstab and, most everything is commented out... so I guess 10.04 no longer uses fstab? What does it use now?
Here's my fstab:
Code:
I commented the last two so that the system would boot. Now it wants home on sda3 and media/disk on sdb1, which is fine, but when I change those in the commented section, obviously nothing happens. I would go through and make the file legible, if I knew that Ubuntu still even uses it.
View 3 Replies
View Related
Jun 23, 2010
I am trying to edit fstab to auto mount a couple of windows shares. I have this but it doesn't work. What am I doing wrong? code...
View 2 Replies
View Related
Jan 31, 2011
I've been having a lot of problems solving my HDD mounting problems and renaming. It finally worked, but I had to delete everything from fstab. As crazy as it sounds, it worked, when I turn my computer on, they automatically mount. They are all working fine. I will attach screen shots too. As you can see my fstab is blank, I was just wondering, is this a problem? Or is it totally normal?
View 4 Replies
View Related
Mar 12, 2011
DVD Drive Isn't In fstab. Isn't In fstabDoes anyone know why this should be so? code....
View 3 Replies
View Related
Aug 16, 2010
Debian 5.0.5 lenny; Kernal Linux 2.6.26-2-686; GNOME 2.22.3
Trying to read the fstab file using code...
So why can't I read the fstab file?
View 5 Replies
View Related
Apr 13, 2010
I want to use Access Control Lists (ACLs) on a removable usb hard drive. I don't know how to set up /etc/fstab for usb drives. Every time I try to make an fstab entry for the usb drive I get an error, when I plug in the usb drive and the system tries to automatically mount it. The drive isn't mounted. If I delete the fstab entry for the usb drive, the drive automatically mounts with no problem. However, ACLs are not enabled, because no fstab entry exists to enable ACLs.
The error message states that "only root can mount the drive". However, as far as I can tell, automatic usb mounting is being done by root. When I plug in the drive (with no fstab entry) and it automatically mounts, Nautilus Properties shows the drive is owned by root and has permissions of rwxr-xrwx.
View 1 Replies
View Related
Jul 15, 2010
I decided to implement quota on /home file system, but unfortunately I had not separate partition of /home file system. So I made entries in fstab at root (/) partition as follow:-
Label=/ / ext3 defaults,usrquota, usrgroup 1 1
and reboot the system, but my system could not give me login screen and after a longtime giving many "read only files" error ends up at following error message:-
"I could not start the X server (your graphical environment) due to some internal error. Please contact your system administrator or check your syslog to diagnose. In the meantime this display will be disabled. Please restart gdm when the problem is corrected."
I also got single user mode and try to remove changes whatever i had made recently but it gives me read only fstab file.
View 9 Replies
View Related
Oct 2, 2009
I really need some help here, this is driving me mad. I edited my fstab file to boot a partition on start up, only instead of typing sda7 I typed sda1 by mistake and now can't boot.
The problem that is driving me mad is I cannot save changes to fstab from a live cd because I do not have root permissions.
I am relatively new to Linux and have no idea how to use the fedora install disk or the commands to use or if it will let me save changes to the file.
I cannot believe something so easy to fix does not appear to be possible because i can't save changes to the fstab on my fedora install.
View 3 Replies
View Related
Feb 23, 2010
I've got a partition, let's say sdb6, which is one of the partitions of my second hard disk.On boot ubuntu only mount my boot partition, let's say sda2, which is on my first drive.Once ubuntu started if I want to mount a partition I usually click on it under the Places menu and an authorization is required.As I would like to add acl to a partition following this thread
Quote:
http://ubuntuforums.org/showthread.php?p=8787962
I've tried to add acl option to my fstab, but my /etc/fstab doesn't have any info of any of my partitions and it originaly looks like:
Quote:
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name[code]...
My goal is to mount/unmount any partition with acl loaded and graphically ,but I reached my limit on my linux knoweledge.
View 9 Replies
View Related
Mar 30, 2010
I run ubuntu 9.10, and my wife runs winxp. I am trying to setup an automount of her storage (D) drive in my fstab. here is the line in fstab:
The share mounts with no errors, but when i go into palces and view the share, it is blank, totally empty. I can create and delete documents here, but the next time I open the share, i cant see anything. If i connect to the share using places>connect to server, everything is fine. If i connect using places, network, and browse to her machine, it works just fine.
Today i did a fresh install of karmic, installed smbfs, added the above line to fstab, same issue. I have searced and searched but I haven't found a problem exactly like this. This setup has been working fine until sometime recently. I cant be sure exactly when it stopped working, or why. The reason I need it to automount is I have several applications that point to that drive. It is worth noting i have tried several variations on the line in fstab, all with the same results.
View 5 Replies
View Related
May 5, 2010
I'm puzzled as to why this fstab isn't working:
Code:
# /etc/fstab: static file system information.
#
[code]...
View 3 Replies
View Related
