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Diffstat (limited to 'static/unix-v10/man4/rf.4')
| -rw-r--r-- | static/unix-v10/man4/rf.4 | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/static/unix-v10/man4/rf.4 b/static/unix-v10/man4/rf.4 new file mode 100644 index 00000000..134889be --- /dev/null +++ b/static/unix-v10/man4/rf.4 @@ -0,0 +1,37 @@ +.pa 1 +.he 'RF (IV)'3/15/72'RF (IV)' +.ti 0 +NAME rf -- RF11-RS11 fixed-head disk file +.sp +.ti 0 +DESCRIPTION This file refers to the +concatenation of both RS-11 disks. +It may be either read or written, although writing is inherently +very dangerous, since +a file system resides there. + +The disk contains 2048 256-word blocks, +numbered 0 to 2047. +Like the other block-structured devices (TC, RK) +this file is addressed in blocks, not bytes. +This has two consequences: +seek____ calls refer to block numbers, not byte numbers; +and sequential reading or writing always advance the read +or write pointer by at least one block. +Thus successive reads of 10 characters from this file +actually read the first 10 characters from successive +blocks. +.sp +.ti 0 +FILES /dev/rf0 +.sp +.ti 0 +SEE ALSO tc(IV), rk(IV) +.sp +.ti 0 +BUGS The fact that this device +is addressed in terms of blocks, not bytes, is extremely +unfortunate. It is due entirely to the fact that +read and write pointers (and consequently the arguments +to seek____) are single-precision +numbers. |