diff options
Diffstat (limited to 'drivers/scsi/README.st')
| -rw-r--r-- | drivers/scsi/README.st | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/scsi/README.st b/drivers/scsi/README.st index c50bd2793..da8099937 100644 --- a/drivers/scsi/README.st +++ b/drivers/scsi/README.st @@ -2,7 +2,7 @@ This file contains brief information about the SCSI tape driver. The driver is currently maintained by Kai M{kisara (email Kai.Makisara@metla.fi) -Last modified: Sun Sep 6 10:03:47 1998 by makisara@home +Last modified: Sun Jan 17 10:57:41 1999 by makisara@home BASICS @@ -60,11 +60,20 @@ scans its database, and sets up the modes using the ioctls. Another alternative is to make a small script that uses mt to set the defaults tailored to the system. - The driver supports fixed and variable block size (within buffer limits). Both the auto-rewind (minor equals device number) and non-rewind devices (minor is 128 + device number) are implemented. +In variable block mode, the byte count in write() determines the size +of the physical block on tape. When reading, the drive reads the next +tape block and returns to the user the data if the read() byte count +is at least the block size. Otherwise the data is truncated. + +In fixed block mode, the data transfer between the drive and the +driver is in multiples of the block size. The write() byte count must +be a multiple of the block size. This is not required when reading but +may be advisable for portability. + Support is provided for changing the tape partition and partitioning of the tape with one or two partitions. By default support for partitioned tape is disabled for each driver and it can be enabled |