1lofi(7D)                            Devices                           lofi(7D)
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NAME

6       lofi - Loopback file driver
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DESCRIPTION

9       The  lofi file driver exports a file as a block device, enabling system
10       utilities such as fstyp(1M),  fsck(1M)  and  mount(1M)  to  operate  on
11       underlying  file system images (including CD-ROM and FAT floppy images)
12       contained on the block device. Reads and writes to the block device are
13       translated  to  reads  and writes on the exported file. See lofiadm(1M)
14       for examples.
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17       File block device entries are contained in  /dev/lofi.  The  /dev/rlofi
18       file contains the character (or raw) device entries. Entries are in the
19       form of decimal  numbers and are assigned  through  lofiadm(1M).   When
20       created,  these device entries are owned by root, in group sys and have
21       permissions of 0600. Ownership, group, and permission settings  can  be
22       altered,  however  there may be ramifications. See lofiadm(1M) for more
23       information.
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26       lofi devices can be compressed. See lofiadm(1M) for more information.
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29       Files exported through lofi can also be encrypted. See lofiadm(1M)  for
30       details on how to specify encryption keys.
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FILES

33       /dev/lofictl
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35           Master control device
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38       /dev/lofi/n
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40           Block device for file n
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43       /dev/rlofi/n
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45           Character device for file n
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48       /kernel/drv/lofi
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50           32-bit driver
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53       /kernel/drv/sparcv9/lofi
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55           64-bit driver (SPARC)
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58       /kernel/drv/amd64/lofi
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60           64-bit driver (x86)
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63       /kernel/drv/lofi.conf
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65           Driver configuration file. (Do not alter).
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ATTRIBUTES

69       See attributes(5) for a description of the following attributes:
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74       ┌─────────────────────────────┬─────────────────────────────┐
75       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
76       ├─────────────────────────────┼─────────────────────────────┤
77       │Architecture                 │SPARC, x86                   │
78       ├─────────────────────────────┼─────────────────────────────┤
79       │Availability                 │SUNWcsr, SUNWcarx.u          │
80       ├─────────────────────────────┼─────────────────────────────┤
81       │Interface Stability          │Committed                    │
82       └─────────────────────────────┴─────────────────────────────┘
83

SEE ALSO

85       fstyp(1M),  fsck(1M), mount(1M), lofiadm(1M), newfs(1M), attributes(5),
86       lofs(7FS)
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NOTES

89       Just as you would not directly access a disk device  that  has  mounted
90       file  systems,  you  should  not  access a file associated with a block
91       device except through the lofi file driver.
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94       For compatibility purposes, a raw device  is  also  exported  with  the
95       block device. (For example, newfs(1M)).
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97
98       The  lofi  driver  isn't available in a zone and will not work inside a
99       zone.
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103SunOS 5.11                        25 Nov 2008                         lofi(7D)
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