d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

finally document new commands

Browse Source
This commit is contained in:
Matt Jacob 1999-02-05 02:45:08 +00:00
parent d17bf266c4
commit 49f8654780
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=43628
1 changed files with 42 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
usr.bin/mt/mt.1
View File

@ -64,6 +64,10 @@ need be specified.
Write
.Ar count
end-of-file marks at the current position on the tape.
.It Cm smk
Write
.Ar count
setmarks at the current position on the tape.
.It Cm fsf
Forward space
.Ar count
@ -72,14 +76,35 @@ files.
Forward space
.Ar count
records.
.It Cm fss
Forward space
.Ar count
setmarks.
.It Cm bsf
Back space
Backward space
.Ar count
files.
.It Cm bsr
Back space
Backward space
.Ar count
records.
.It Cm bss
Backward space
.Ar count
setmarks.
.It Cm rdhpos
Read Hardware block position. Some drives do not support this. The block
number reported is specific for that hardware only. The count argument is
ignored
.It Cm rdspos
Read SCSI logical block position. Some drives do not support this. The
count argument is ignored.
.It Cm sethpos
Set Hardware block position. Some drives do not support this. The count
argument is interpreted as a hardware block to position to.
.It Cm setspos
Set SCSI logical block position. Some drives do not support this. The count
argument is interpreted as a hardware block to position to.
.It Cm rewind
Rewind the tape
(Count is ignored).
@ -93,7 +118,20 @@ A count of 0 disables long erase, which is on by default.
Re-tension the tape
(one full wind forth and back, Count is ignored).
.It Cm status
Print status information about the tape unit.
Print status information about the tape unit. For SCSI magnetic tape devices,
the current operating modes of density, blocksize, and whether compression
is enabled is reported. The current state of the driver (what it thinks that
it is doing with the device) is reported. If the driver knows the relative
position from BOT (in terms of filemarks and records), it prints that. Note
that this information is not definitive (only BOT, End of Recorded Media, and
hardware or SCSI logical block position (if the drive supports such) are
considered definitive tape positions.
.It Cm errstat
Print (and clear) error status information about this device. For every normal
operation (e.g., a read or a write) and every control operation (e.g,, a
rewind), the driver stores up the last command executed and it's associated
status and any residual counts (if any). This command retrieves and prints this
information. If possible, this also clears any latched error information.
.It Cm blocksize
Set the block size for the tape unit. Zero means variable-length
blocks.
@ -254,7 +292,7 @@ SCSI magnetic tape interface
.Xr dd 1 ,
.Xr ioctl 2 ,
.Xr mtio 4 ,
.Xr st 4 ,
.Xr sa 4 ,
.Xr wt 4 ,
.Xr environ 7
.Sh HISTORY