crl(4) — VAX
Name
crl − RL02 console interface
Description
This is a simple interface to the RL02 disk unit, which is part of the console subsystem for the VAX 8600 (8650). Access is given to the entire RL02 consisting of 512 cylinders of two tracks of 20 sectors of 256 bytes. The RL02 sectors are accessed as logical 512-byte disk blocks.
All I/O is raw; the seek addresses in raw transfers should be a multiple of 512 and a multiple of 512 bytes should be transferred, as in other “raw” disk interfaces.
Restrictions
Only one “open” is allowed to the console RL02 device at any given time.
If a write is given with a count not a multiple of 512 bytes, the trailing portion of the last logical block will be zeroed.
The primary purpose of this driver is to apply updates to the console system disk. A “block” interface is not provided.
Diagnostics
crl: hard error sn%d crlcs=0x%b, crlds=0x%b
The console subsystem has reported a hard error while performing the requested I/O.The crlcs contains standard RLV211 control and status information and clrds contains standard drive status information. Bit expansion in ASCII is also provided.
crl: hndshk error
An error in communications between the console subsystem software and the ULTRIX operating system has occurred.
Files
/dev/crl