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File System Types

UFS Unix File System. The default file systemtype for Solaris

HSFS High Sierra File System CDROM filesystem format based on the ISO 9660 standard

PCFS Personal Computer File System DOSformatted floppies

UDF Universal Disk Format mainly for reading

DVD. Remember, a file system is a hierarchical

collection of directories and files.

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Creating New File Systems

Disk partitions are like virtual disks. It is a way tosubdivide a single disk into several virtual disks.

Naming convention:

CxTyD0Sz

Cx Controller X, X=0-7

Ty SCSI ID Y, Y=0-15

D0 always set this way

Sz Slice(Partition) Z, Z=0-7

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Creating New File Systems

Identify the disk partition you want to use.

Use the newfs command to create the file systemstructure on that partition.

newfs /dev/dsk/c0t0d0s1

3% of the actual available space is reserved forsystem maintenance.

A lost+found directory is created for file system

checks and repair

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fsck

fsck is the Unix file system repair command.

Its very useful for checking and repairing problems

with the disk, file system, superblocks and inodes.

These problems are usually caused by a hardwarefailure or power loss.

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du, df

The du command displays the size of a directory in

a file system.

du s directory

Displays the total size of the directory

du directory

Displays the sizes of the files inside the directory

The df command displays all of the mounted file

systems, their sizes and capacity.

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quot

The quot command will display how much disk

space is being used by a particular user.

2 flags

-a report on all mounted file systems -f report the number of files owned by the user.

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mount, umount

File systems must be mounted before they can be

accessed by users.

The mount point is the anchor point for the

directory tree structure. A mount point is basicallyan empty directory until you mount a file system on

it.

The umount command detaches the file system

from the mount point and makes the FSunavailable to the users.

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/etc/mnttab, /etc/vfstab

2 files that control and list the mounted filessystems.

/etc/mnttab is a system generated file listing thecurrently mounted file systems. This is not a text

file anymore.

/etc/vfstab is the file that tells the system which filesystems to mount at boot time.

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/etc/vfstab

/, /usr, /var, /opt, /proc, /tmp, /home or

/export/home are automatically mounted at boot.

/etc/vfstab contains the information needed to

mount these file systems.Add your file systems to this file if you want them

mounted at boot.

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/etc/vfstab

7 fields

Device path to the file system

Raw device path to the disk partition to fsck

The mount point directory

The file system type (ufs, pcfs, hsfs, uds)

The order for fsck to run

Mount at boot?

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Whats in the file systems and System

Directories

/ - top of the Unix directory tree. All directories arecomponents of this tree.

/etc system configuration files, password filesand databases

/opt default location of optional software. Thedefault location for most Sun software.

/proc special system FS that contains a list ofactive processes on the system.

/tmp scratch work area. Solaris uses this asswap space.

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Whats in the file systems and System

Directories

/usr contains system binaries and libraries. Alsoused to contain freeware.

/var used to store the system logs

/home, /export/home default location of the userhome directories

/var/run repository for temp system files that

arent needed across system reboots.

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Reading from the CDROM

Solaris Volume Management is enabled by defaultso its easy to load a cd.

Once you load it in the drive, Solaris automaticallymounts it to /cdrom

To look at the content of the CD:

ls l /cdrom/cdrom0

Use the cp command to copy files from the CD to

disk. To unload the CD

cd out of the cdrom directory

Enter: eject cdrom