svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
zfs(4fs)
zfs(4FS) File Systems zfs(4FS)
NAME
zfs - ZFS file system
SYNOPSIS
#include <libzfs.h>
DESCRIPTION
ZFS is the default root file system in the Oracle Solaris release. ZFS
is a disk based file system with the following features:
o Uses a pooled storage model where whole disks can be added
to the pool so that all file systems use storage space from
the pool.
o A ZFS file system is not tied to a specific disk slice or
volume, so previous tasks, such as repartitioning a disk or
unmounting a file system to add disk space, are unnecessary.
o ZFS administration is simple and easy with two basic com‐
mands: zpool(8) to manage storage pools and zfs(8) to manage
file systems. No need exists to learn complex volume manage‐
ment interfaces.
o All file system operations are copy-on-write transactions so
the on-disk state is always valid. Every block is check‐
summed to prevent silent data corruption. In a replicated
RAID-Z or mirrored configuration, ZFS detects corrupted data
and uses another copy to repair it.
o A disk scrubbing feature reads all data to detect latent
errors while the errors are still correctable. A scrub tra‐
verses the entire storage pool to read every data block,
validates the data against its 256-bit checksum, and repairs
the data, if necessary.
o ZFS is a 128-bit file system, which means support for 64-bit
file offsets, unlimited links, directory entries, and so on.
o ZFS provides snapshots, a read-only point-in-time copy of a
file system and cloning, which provides a writable copy of a
snapshot.
A ZFS storage pool and ZFS file system are created in two steps:
# zpool create tank mirror c1t0d0 c1t1d0
# zfs create tank/fs1
A ZFS file system is mounted automatically when created and when the
system is rebooted by an SMF service. No need exists to edit the
/etc/vfstab file manually. If you need to mount a ZFS file manually,
use syntax similar to the following:
# zfs mount tank/fs1
For more information about managing ZFS file systems, see the Managing
ZFS File Systems in Oracle Solaris 11.4.
ATTRIBUTES
See attributes(7) for a description of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Interface StabilityUncommitted
SEE ALSO
du(1), attributes(7), df(8), zfs(8), zpool(8)
Managing ZFS File Systems in Oracle Solaris 11.4
NOTES
1. ZFS does not have an fsck-like repair feature because the
data is always consistent on disk. ZFS provides a pool
scrubbing operation that can find and repair bad data. In
addition, because hardware can fail, ZFS pool recovery fea‐
tures are also available.
2. Use the zpool list and zfs list to identify ZFS space con‐
sumption. A limitation of using the du(1) command to deter‐
mine ZFS file system sizes is that it also reports ZFS meta‐
data space consumption. The df(8) command does not account
for space that is consumed by ZFS snapshots, clones, or quo‐
tas.
3. A ZFS storage pool that is not used for booting should be
created by using whole disks. When a ZFS storage pool is
created by using whole disks, an EFI label is applied to the
pool's disks. Due to a long-standing boot limitation, a ZFS
root pool must be created with disks that contain a valid
SMI (VTOC) label and a disk slice, usually slice 0.
Oracle Solaris 11.4 16 Dec 2015 zfs(4FS)