Hi,
Can anyone explain why we use defaults 0 0 in fstab and what does 0 inidicate
Thanks in advance
Muzaffar
Hello muzaffar.k,
Simple answer is ,second last field(5th field) determines if it should be dumped, last field(6th field) determines if it should be checked during startup and in what sequence. We could get this information from manual entry of fstab as follows. man fstab:
Quote:
The fifth field, (fs_freq), is used for these filesystems by the dump(8) command to determine which filesystems need to be dumped. If the fifth field is not present, a value of zero is returned and dump will assume that the filesystem does not need to be dumped.
The sixth field, (fs_passno), is used by the fsck(8) program to determine the order in which filesystem checks are done at reboot time. The root filesystem should be specified with a fs_passno of 1, and other filesystems should have a fs_passno of 2. Filesystems within a drive will be checked sequentially, but filesystems on different drives will be checked at the same time to utilize parallelism available in the hardware. If the sixth field is not present or zero, a value of zero is returned and fsck will assume that the filesystem does not need to be checked.
I've created a new drive and i've added it to my fstab file but on startup it will not mount. here is how i put it into my fstab file, is that right?
/dev/hdb2 /disk2a ext3 defaults 1 2 (6 Replies)
Hi All,
In RH 8.0, I am not able to mount USB pendrive. I know one method where in /etc/fstab is to be edited, so that it points to a directory /mnt/usb.
After that it mount automatically.
Unfortunately, i have forgotten the parameter to add in /etc/fstab-can anyone help me please?
Thanks... (1 Reply)
Folks;
Please be patient with this issue when you read it. I know it's a little tricky.
I have a new share created on my SUSE 10 box. I'm trying to edit the /etc/fstab file or find a way to make this share needs no authentication.
The reason for that is we're using an outside application to... (3 Replies)
I was making text file copies of some system utility output (e.g. ioscan) and happened to look at /etc/fstab and found this:
/dev/vg02/lvol1 /prodbkup vxfs ioerror=mwdisable,log,nodatainlog,dev=40
020001 0 0
my other entries look like this:
/dev/vg04/lvol1 /trainbkup vxfs... (4 Replies)
Hello,
I transferred a machine from a tape back into a virtual machine. I created several paritions so I could xfter the date into them and made sda1 the active one. When I try and boot the VM it does not work. I used KNOPPIX to create the partitions and transfer the information from the tape... (1 Reply)
We have a load of servers which require cloning in VMWare, each of which have their own area on netapp for storage. I was trying to be a bit clever and use a variable within /etc/fstab so I dont need to edit it every time like so;
netapp:/vol/vol_nfs_server/servers/`hostname | sed 's/\./ /g' |... (1 Reply)
hi ,
i'm creating a shell script using fstab for my project of last year, i wonder you can help me to know what is the command allow me to get the list of unmounted partitions.
thanks (4 Replies)
I have created a thumbdrive with a bootable version of Ubuntu 10.04 LTS, it uses Grub legacy.
One of the issues I have is that everytime I boot a new system from the thumbdrive, it writes entries for the partitions in the fstab. Consequently, when I boot another system, the OS reads the fstab... (2 Replies)
Hi Folks!
I accidentally overwrote in /etc/fstab file. Can you guys please tell me, what impact it would have created, when I restarted the machine(RHEL6).
I executed this command :
# blkid /dev/vda5 > /etc/fstab (17 Replies)
Can you please help me mount below filesystem in fstab ( I have rhel 5 )
as the line is long - it is not taking as single line
How can break this in 2 line and act as one ....please help
... (4 Replies)
Discussion started by: saurabh84g
4 Replies
LEARN ABOUT X11R4
fstab
FSTAB(5) File Formats FSTAB(5)NAME
fstab - static information about the filesystems
SYNOPSIS
/etc/fstab
DESCRIPTION
The file fstab contains descriptive information about the filesystems the system can mount. fstab is only read by programs, and not writ-
ten; it is the duty of the system administrator to properly create and maintain this file. The order of records in fstab is important
because fsck(8), mount(8), and umount(8) sequentially iterate through fstab doing their thing.
Each filesystem is described on a separate line. Fields on each line are separated by tabs or spaces. Lines starting with '#' are com-
ments. Blank lines are ignored.
The following is a typical example of an fstab entry:
LABEL=t-home2 /home ext4 defaults,auto_da_alloc 0 2
The first field (fs_spec).
This field describes the block special device or remote filesystem to be mounted.
For ordinary mounts, it will hold (a link to) a block special device node (as created by mknod(8)) for the device to be mounted,
like `/dev/cdrom' or `/dev/sdb7'. For NFS mounts, this field is <host>:<dir>, e.g., `knuth.aeb.nl:/'. For filesystems with no
storage, any string can be used, and will show up in df(1) output, for example. Typical usage is `proc' for procfs; `mem', `none',
or `tmpfs' for tmpfs. Other special filesystems, like udev and sysfs, are typically not listed in fstab.
LABEL=<label> or UUID=<uuid> may be given instead of a device name. This is the recommended method, as device names are often a
coincidence of hardware detection order, and can change when other disks are added or removed. For example, `LABEL=Boot' or
`UUID=3e6be9de-8139-11d1-9106-a43f08d823a6'. (Use a filesystem-specific tool like e2label(8), xfs_admin(8), or fatlabel(8) to set
LABELs on filesystems).
It's also possible to use PARTUUID= and PARTLABEL=. These partitions identifiers are supported for example for GUID Partition Table
(GPT).
See mount(8), blkid(8) or lsblk(8) for more details about device identifiers.
Note that mount(8) uses UUIDs as strings. The string representation of the UUID should be based on lower case characters.
The second field (fs_file).
This field describes the mount point (target) for the filesystem. For swap partitions, this field should be specified as `none'. If
the name of the mount point contains spaces or tabs these can be escaped as ` 40' and '