02-15-2007
The files under /dev/dsk are block special files, when you do an "ls -l" you will see all line start with a "b".
The files under /dev/rdsk are character special files, when you do an "ls -l" you will see all lines start with a "c".
- regular files
d directory
b block special file
c character special file
l soft link
s socket
p named pipe
Block special files are used for mounting etc.
Character specal files are used for formatting and filesystem check etc
That is why eacht entry in your vfstab contains both the block and character specil file.
You do NOT check filesystems which or NON local disks during boot. If you mount NFS filesystems it is up to the system who exports those filesystems to maintain the integrity. So "fsck pass" should be "no" for NFS fllesystems
For those disks which are checked during boot the number indicates an order.
Those with the lowest number are checked first, next those with the 2nd lowest number, etc
The "/" filesystem should be checked priot to all other filesystems and therefore have the lowest number. A good concept would be whenever you mout a filesystem on another fileystem you increae to number by 1.
Suppose I have 5 filesystems
/
/usr
/var
/opt
/opt/oracle
In this case "/" would get "1"
"/usr", "/var" and "/opt" get "2" since they are mounted on "/"
"/opt/oracle" would get "3" since it is mount on "/opt" which is mounted on "/".
In this scenario "/" would be checked first
Next "/usr", "/var" and "/opt" similtaniously
and last "/opt/oracle"
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I try to share a directory from a wortstation to a server.
the share command was no problem.
Solaris 8
on mars
share -F nfs -o rw /dir/dir2
on the server
mount mars:/dir/dir2 /mount_point
RPC: Program not registered <--- What is the meaning of this ?
Thanks for you help ! (2 Replies)
Discussion started by: joerg
2 Replies
2. UNIX for Dummies Questions & Answers
I want help about mount a filesystem to use a cdrom to install a software that be in the cd cdrom..
you can send a mail ::removed emails:: (5 Replies)
Discussion started by: amauryrgrullon
5 Replies
3. Linux
:) Hi frds ..i hope i can get some help for this.. I am unable to mount ntfs/hpfs file system which contain my XP o/s. As per the information collected on net i found tht my kernel i.e 2.4.xx does not support ntfs ..?
Now I dont knwo where to get upgraded kernel and how to deploy it ..can anyone... (0 Replies)
Discussion started by: nicknihal
0 Replies
4. Linux
Hi,
I have a software in one of the pcs connected in the network and I need to mount that file system in my PC. Both the pcs have Linux installed. Please let me know how can we achieve this.
Any pointers would be of great help.
Thanks & Regards,
Venkatesh. (3 Replies)
Discussion started by: venkatesh_sasi
3 Replies
5. Solaris
Hi All,
I have mount /usr directory as a seperate filesystem.The /usr directory includedd in / root file system.I have to mount it as seperate.
Please Help me,
Thanks and Regards, (7 Replies)
Discussion started by: lbreddy
7 Replies
6. Solaris
Hey all,
I have a machine with 16 drive slots. Two of the drives have a ZFS mirror of the operating system, the other 14 contain the storage raidz.
So, after installing Opensolaris on the OS drives, how can I remount the storage raid?
TIA (11 Replies)
Discussion started by: PatrickBaer
11 Replies
7. Shell Programming and Scripting
Hi All,
My below shell script is not capturing %used value in the filesystem alert in the subject of the mail alert:
#!/bin/bash
export DBALIST="abc@xyz.com"
df -k /oradata/xyz/archive > dfk.result
archive_capacity=`awk -F" " '{ print $5 }' dfk.result|grep -i %| cut -c 1-4`
if ]
then... (5 Replies)
Discussion started by: a1_win
5 Replies
8. AIX
Dear all,
We are facing prolem when we are going to mount AIX filesystem, the system returned the following error
0506-307The AFopen call failed
: A file or directory in the path name does not exist.
But when we ls filesystems in the /etc/ directory it show
-rw-r--r-- 0 root ... (2 Replies)
Discussion started by: m_raheelahmed
2 Replies
9. UNIX for Dummies Questions & Answers
I have 2 Linux servers.
rcwlo-ods10g and rcwlo-10gdev
I can mount one filesystem from rcwlo-ods10g onto rcwlo-10gdev fine:
RCWLO-10gDev:/ # mount -F rcwlo-ods10g:/SAN /backup
but when I try another one I get:
RCWLO-10gDev:/ # mount -F rcwlo-ods10g:/backup /backup
mount:... (0 Replies)
Discussion started by: jamie_collins
0 Replies
10. Solaris
I have oi_151a7 and installed from sfe fuse-ext, libfuse and e2fsprogs. Mount e.g.
# mount -F ext2fs /dev/dsk/c4t0d0p1 /mnt
returns
"mount: Operation not applicable to FSType ext2fs"
and
$ fuse-ext2 /dev/dsk/c4t0d0p1 ~/tmp/a/
does not output anything but the filesystem seems not to be... (3 Replies)
Discussion started by: bsdx
3 Replies
LEARN ABOUT OPENDARWIN
vfstab
vfstab(4) File Formats vfstab(4)
NAME
vfstab - table of file system defaults
DESCRIPTION
The file /etc/vfstab describes defaults for each file system. The information is stored in a table with the following column headings:
device device mount FS fsck mount mount
to mount to fsck point type pass at boot options
The fields in the table are space-separated and show the resource name (device to mount), the raw device to fsck (device to fsck), the
default mount directory (mount point), the name of the file system type (FS type), the number used by fsck to decide whether to check the
file system automatically (fsck pass), whether the file system should be mounted automatically by mountall (mount at boot), and the file
system mount options (mount options). (See respective mount file system man page below in SEE ALSO for mount options.) A '-' is used to
indicate no entry in a field. This may be used when a field does not apply to the resource being mounted.
The getvfsent(3C) family of routines is used to read and write to /etc/vfstab.
/etc/vfstab can be used to specify swap areas. An entry so specified, (which can be a file or a device), will automatically be added as a
swap area by the /sbin/swapadd script when the system boots. To specify a swap area, the device-to-mount field contains the name of the
swap file or device, the FS-type is "swap", mount-at-boot is "no" and all other fields have no entry.
EXAMPLES
The following are vfstab entries for various file system types supported in the Solaris operating environment.
Example 1: NFS and UFS Mounts
The following entry invokes NFS to automatically mount the directory /usr/local of the server example1 on the client's /usr/local directory
with read-only permission:
example1:/usr/local - /usr/local nfs - yes ro
The following example assumes a small departmental mail setup, in which clients mount /var/mail from a server mailsvr. The following entry
would be listed in each client's vfstab:
mailsvr:/var/mail - /var/mail nfs - yes intr,bg
The following is an example for a UFS file system in which logging is enabled:
/dev/dsk/c2t10d0s0 /dev/rdsk/c2t10d0s0 /export/local ufs 3 yes logging
See mount_nfs(1M) for a description of NFS mount options and mount_ufs(1M) for a description of UFS options.
Example 2: pcfs Mounts
The following example mounts a pcfs file system on a fixed hard disk on an x86 machine:
/dev/dsk/c1t2d0p0:c - /win98 pcfs - yes -
The example below mounts a Jaz drive on a SPARC machine. Normally, the volume management daemon (see vold(1M)) handles mounting of remov-
able media, obviating a vfstab entry. If you choose to specify a device that supports removable media in vfstab, be sure to set the mount-
at-boot field to no, as below. Such an entry presumes you are not running vold.
/dev/dsk/c1t2d0s2:c - /jaz pcfs - no -
For removable media on a SPARC machine, the convention for the slice portion of the disk identifier is to specify s2, which stands for the
entire medium.
For pcfs file systems on x86 machines, note that the disk identifier uses a p (p0) and a logical drive (c, in the /win98 example above) for
a pcfs logical drive. See mount_pcfs(1M) for syntax for pcfs logical drives and for pcfs-specific mount options.
Example 3: CacheFS Mount
Below is an example for a CacheFS file system. Because of the length of this entry and the fact that vfstab entries cannot be continued to
a second line, the vfstab fields are presented here in a vertical format. In re-creating such an entry in your own vfstab, you would enter
values as you would for any vfstab entry, on a single line.
device to mount: svr1:/export/abc
device to fsck: /usr/abc
mount point: /opt/cache
FS type: cachefs
fsck pass: 7
mount at boot: yes
mount options:
local-access,bg,nosuid,demandconst,backfstype=nfs,cachedir=/opt/cache
See mount_cachefs(1M) for CacheFS-specific mount options.
Example 4: Loopback File System Mount
The following is an example of mounting a loopback (lofs) file system:
/export/test - /opt/test lofs - yes -
See lofs(7FS) for an overview of the loopback file system.
SEE ALSO
fsck(1M), mount(1M), mount_cachefs(1M), mount_hsfs(1M), mount_nfs(1M), mount_tmpfs(1M), mount_ufs(1M), swap(1M), getvfsent(3C)
System Administration Guide: Basic Administration
SunOS 5.10 21 Jun 2001 vfstab(4)