[unix-history] / man / man4 / tc.4

.pa 1
.he 'TC (IV)'3/15/72'TC (IV)'
.ti 0
NAME		tc -- TC-11/TU56 DECtape
.sp
.ti 0
DESCRIPTION	The
files tap0 ... tap7 refer to the
TC-11/TU56 DECtape drives 0 to 7.
Since the logical drive number can be manually set,
all eight files exist even though at present there are fewer
physical drives.

The 256-word blocks on a standard DECtape are numbered 0 to 577.
However, the system makes no assumption about this number;
a block can be read or written if it exists on the
tape and not otherwise.
An error is returned if a transaction
is attempted for a block which does not exist.

Addressing on the tape files, like that on the
RK and RF disks, is block-oriented.
.sp
.ti 0
FILES		/dev/tap?
.sp
.ti 0
SEE ALSO	rf(IV), tap(I)
.sp
.ti 0
BUGS		see rf(IV)
Commit	Line	Data
c94b809a KT	1	.pa 1
	2	.he 'TC (IV)'3/15/72'TC (IV)'
	3	.ti 0
	4	NAME tc -- TC-11/TU56 DECtape
	5	.sp
	6	.ti 0
	7	DESCRIPTION The
	8	files tap0 ... tap7 refer to the
	9	TC-11/TU56 DECtape drives 0 to 7.
	10	Since the logical drive number can be manually set,
	11	all eight files exist even though at present there are fewer
	12	physical drives.
	13
	14	The 256-word blocks on a standard DECtape are numbered 0 to 577.
	15	However, the system makes no assumption about this number;
	16	a block can be read or written if it exists on the
	17	tape and not otherwise.
	18	An error is returned if a transaction
	19	is attempted for a block which does not exist.
	20
	21	Addressing on the tape files, like that on the
	22	RK and RF disks, is block-oriented.
	23	.sp
	24	.ti 0
	25	FILES /dev/tap?
	26	.sp
	27	.ti 0
	28	SEE ALSO rf(IV), tap(I)
	29	.sp
	30	.ti 0
	31	BUGS see rf(IV)