I am having an issue mounting more than one windows share using fstab with cifs on ubuntu 14. The b flag with nano will make a backup automatically. Linux disable var access time updates noatime nixcraft. One of the more important configuration files in linux is the file systems tab. Programs such as pmount allow ordinary users to mount and unmount filesystems without a corresponding fstab entry. All entries added to etcfstab by fstabsync can be identified by the use of the option managed in the options field.
During the past years i learned some things about configuring linux on a ssd drive. Jun 17, 2015 i am having an issue mounting more than one windows share using fstab with cifs on ubuntu 14. Gain 30% linux disk performance with noatime, nodiratime. Mount the file system with the noatime option when using in in flash memory sticks or ssd drives. It is strictly a placeholder for use when there is nothing else needed in the 4th field of an fstab entry. Using noatime, and related gems in linuxs fstab jay caissie january, 2015. If a file system has been mounted with this option, reading accesses to the file system will no longer result in an update to the atime information associated.
With previous versions of ubuntu using ext3 filesystem i used to tune it for better performance with noticeable results by setting the noatime parameter in etcfstab. The etcfstab file is a system configuration file that contains all available disks, disk partitions and their options. Itll doesnt necesarily require a reboot as you can use umountmount, but that gets tricky when. This document will describe fstab stanzas for different filesystems and partitions as standardized in ubuntu across various things that parsecreateinstall. If a file system has been mounted with this option, reading accesses to the file system will no longer result in an update to the atime information associated with the file like we have explained above. The mount command will use fstab, if just one of either directory or device is given, to fill in the value for the other parameter. How to use uuid to mount partitions volumes under ubuntu linux last updated september 27, 2008 in categories centos, debian. You would modify the line in the etcfstab file to look like below. This will instantiate mount and swap units as necessary. Dec 08, 20 gain 30% linux disk performance with noatime, nodiratime, and relatime.
Remount etcfstab without reboot in linux shellhacks. And on the ubuntu site read this and this and finally this forum. What is linux fstab file and how can we configure it. Gain 30% linux disk performance with noatime, nodiratime, and. My var is exclusively used for caching purpose and i do not want to waste disk io while updating lasttimeread attribute during reads and writes to files. Stack overflow for teams is a private, secure spot for you and your coworkers to find and share information. In other words is a list of disks and partitions and also include information regarding where they are mounted in your operating system. If you are sing partitioning volume manager then disk partitions will have partuuid partition uuid even if you dont format them. First of all keep in mind you need to format your logical volume to get uuid registered in kernel for it. Thus, you want to add the noatime option to the disk mount in etcfstab. Were using gedit, an easy to use editor found in most linux distributions. The fstab file typically lists all available disk partitions and other types of file systems and data sources that are not necessarily diskbased, and indicates how they are to be initialized or otherwise. How do i update etcfstab using uuid under ubuntu linux or any other linux distro. It should append,noatime to whatever is in column 4 if noatime isnt already there, leaving comments alone.
Every filesystem has a slightly different way of being mounted. About 2010, i jumped from ubuntu because of amazon search bar and other such issues being slowarespywareetc. Load, reload or refresh your fstab mounts wilton software. There is a simple way which will remount all the partitions from your etc fstab file without restarting the system. It may be needless to say that my macbook ran faster than many macbook pros at that time. Theres a file called etcfstab in your linux system. If you have just the defaults in there, you just make it defaults,noatime. Sep 20, 2012 the etcfstab is readable by everyone so it obviously wouldnt be a good idea to have your windows password in it. Please, before you edit system files, make a backup. What should be the ideal configuration for my use case.
If this option is set for a file system in etcfstab, then reading accesses will no longer cause the. And the resolved issue here disable autocheck at mount disable auto fsck check on boot after 30 mounts. Ive configured and mounted var for squid caching and other purposes under linux. Using uuids in your fstab file, while convenient for most home users, does have a few big caveats. If youre more of an advanced user, or plan on using things like software raid in the future, youre better off not using uuids. I understand that partitions that are mounted on startup can be configured with noatime by adding that flag to the partitions entry in etc fstab. Be sure to turn off the discard option when making your linux filesystem. If you are going to use a software raid, it is recommended to use a chunk size of. In order to load your new mount entries, reload, or refresh your fstab mount points you can do this. I think it increases speed because when a file is accessed read from, it will also record that as being a time the file was accessed, and that writing to the file takes extra time, as does writing that extra data when it is being written to. Afaik its the very rare program indeed that relies on atime, and using noatime is safe.
How to add uuid entry in etcfstab in linux kernel talks. They are the partition on the existing hard drive devsda1, and the swap file system. Uuid30fcb748ad1e4228af2f951e8e7b56df ext3 defaults,errorsremountro,noatime 0 1. Fstab and relatimenoatime hi i just edit my etcfstab file and change my root and home partition to relatime, because my system becomes somehow sluggish and hhd loud after couple of days of uptime. The etcfstab is readable by everyone so it obviously wouldnt be a good idea to have your windows password in it.
I run a number of linux servers with noatime on all filesystems, and i cant. Oct 25, 2014 to further improve the io performance, you can choose to use the noatime mount option for selected partitions like or root partition but leave the varspool, tmp and other required partitions with relatime option. Is it still worth it to do that with the ext4 filesystem, which is now default in ubuntu. The etcfstab file, by the linux information project. For example, if i create the following line according to the man page for devsdb, is it correct. The etcfstab mount option nofail may be used to have fsck skip nonexisting devices. Edit fstab to automount secondary hard drives on linux. In order to load your new mount entries, reload, or refresh your fstab mount points you can do this simply with the mount command as follows. The fstab or file systems table file is a system configuration file commonly found at etcfstab on unix and unixlike computer systems. Sep 26, 2010 load, reload or refresh your fstab mounts. Backup client software also use file last update time to sync with backup. You can do this on music and movies to access these files from ubuntu. Sep 27, 2008 how to use uuid to mount partitions volumes under ubuntu linux last updated september 27, 2008 in categories centos, debian ubuntu, fedora linux, file system, hardware, linux, networking, storage, suse, troubleshooting, ubuntu linux.
Open your etcfstab file with the gedit text editor and add noatime where shown below. The discussion then looked at using the relatime mount option to. But its not useful in etcfstab since fstab deals with formatted partitions. Unless you require an audit trail of users reading files, you generally you dont want this. Simply add noatime to your filesystem mount options in etcfstab to prevent atime. The author is the creator of nixcraft and a seasoned sysadmin. Fstab and relatimenoatime hi i just edit my etcfstab file and change my root and home partition to relatime, because my system becomes somehow sluggish and hhd loud after couple of.
This is the default with recent ubuntu desktop distributions. It should append, noatime to whatever is in column 4 if noatime isnt already there, leaving comments alone. The fstab5 file can be used to define how disk partitions, various other. Edit fstab to automount secondary hard drives on linux by derrik diener posted on jul 2, 2015 jul 1, 2015 in linux if you are using linux and have multiple hard drives in your system, you may find that the system does not automount the secondary hard drive when you start up your computer. That makes sense, as mountall has not implemented nofail. Below is a sample of the fstab file with the mount point options.
If the device is not enable after you boot and mount it using fstab, no errors. After editing the etc fstab file you would normally have to reboot the linux system. Here are some steps you should take to extend the life of your ssd drive. Simply add noatime to your filesystem mount options in etcfstab to prevent atime from being updated on file and directory accesses. How to use uuid to mount partitions volumes under ubuntu linux. Add the noatime or relatime mount option in etcfstab, to disable or. When doing so, mount options which are listed in fstab will also be used. Linux has a special mount option for file systems called noatime that can be added to each line that addresses one file system in the etc fstab file. Linux and unix tutorials for new and seasoned sysadmin. While updating fstab, i have used defaults,nofail for now but i am not sure what exactly i should be using. All entries added to etc fstab by fstabsync can be identified by the use of the option managed in the options field. Gain 30% linux disk performance with noatime, nodiratime, and relatime. For some reasons the command mount a doesnt work for all things that is in fstab. Linux has a special mount option for file systems called noatime.
Understanding the filesystem table etc fstab is an important part in having more knowledge in mounting filesystems. Nov 27, 2009 ive configured and mounted var for squid caching and other purposes under linux. After editing the etcfstab file you would normally have to reboot the linux system. The passno field is treated like a simple boolean, and the ordering information is discarded. Noatime will tell the filesystem not to record the last accessed date of the file. Reducing disk io by mounting partitions with noatime. This doesnt work when using things like assembled or networkbased devices. You would normally have to reboot your linux system, after editing this file. In fstab or filesystemtable,you will be able to find informations regarding all your mount points in your computer.
Apr 12, 2019 in this short tutorial we will walk you through how to get uuid of the filesystem so that it can be used in etcfstab. If you are going noatime for files, i wonder if there is a reason not to use nodiratime in addition to noatime so you are not updating the access time on directories as well. As an alternative to noatime you might consider relatime relaxed atime if your kernel and. What is the linux fstab file, and how does it work. Nov 23, 2014 every filesystem has a slightly different way of being mounted. The previous few releases had relatime explicitly in etc fstab. In ubuntu it is possible to use the mount option nobootwait in the etc fstab to tell the system that it does not have. The way to get around this is, by using what is known as a credentials file. Each line contains six fields separated by one or more spaces or tabs.
When you learn to understand the fstab file, youll be able to edit its contents. Reducing disk io by mounting partitions with noatime howtoforge. Can i sell a proprietary software with an lgpl library bundled along with it, without making my source code public. It takes its name from file systems table, and it is located in the etc directory the term filesystem can refer to a hierarchy of directories also called a directory tree that is used to organize files on a computer system. The configuration file etcfstab contains the necessary information to automate the process of mounting partitions you would normally have to reboot your linux system, after editing this file there is a simple way which will remount all the partitions from your etcfstab file without restarting the system. When the etcfstab file is written by fstabsync, a comment with a link to this manual page is added to the file.
The editor appears with your fstab file loaded in it. Uuid14314872abd524e7a850db36fab2c6a1 devsdb ext4 defaults, noatime 0 0. Aug 21, 2017 uuid30fcb748ad1e4228af2f951e8e7b56df ext3 defaults,errorsremountro, noatime 0 1. For this reason the linux ata driver maintains a blacklist of certain.
The atime and noatime attribute linux documentation project. How to remount etcfstab without reboot in linux looklinux. When and where to use rw,nofail,noatime,discard,defaults. Understanding the filesystem table etcfstab is an important part in having more knowledge in mounting filesystems.
I understand that partitions that are mounted on startup can be configured with noatime by adding that flag to the partitions entry in etcfstab. There are only a handful of pieces of software that rely on the atime none of which you probably run. Jul 02, 2015 edit fstab to automount secondary hard drives on linux by derrik diener posted on jul 2, 2015 jul 1, 2015 in linux if you are using linux and have multiple hard drives in your system, you may find that the system does not automount the secondary hard drive when you start up your computer. In this article i will provide you simple way which will remount all the partitions from. Reducing disk io by mounting partitions with noatime linux has a special mount option for file systems called noatime. Uuid30fcb748ad1e4228af2f951e8e7b56df ext3 defaults,errorsremountro, noatime 0 1. Ive noticed that the linux file system keeps records of when files are created, updated, and accessed. In this article i will provide you simple way which will remount all the partitions from your etc fstab file without restarting the system. The order of records in fstab is important because fsck8, mount8, and umount8 sequentially iterate through fstab doing their thing. The following is an example of an fstab file on a typical linux system. Logical volume without filesystem on it wont be having uuid attached to it. I just changed swap partition, and wanted to see, is the syntax right alas the mount doesnt did a trick. We can open fstab with the text editors like nano, vim,gnome text editor, kwrite etc.
A range from linux from scratch, arch linux, debian, ubuntu, etc. Jun 06, 20 unless you require an audit trail of users reading files, you generally you dont want this. When the etc fstab file is written by fstabsync, a comment with a link to this manual page is added to the file. Fstab5 linux programmers manual fstab5 name fstab static information about the filesystems synopsis etcfstab description the file fstab contains descriptive information about the various file systems. The configuration file etc fstab contains the necessary information to automate the process of mounting partitions. Linux has a special mount option for file systems called noatime that can be added to each line that addresses one file system in the etcfstab file. How to update my current fstab the two lines to use the uuid.