April 22, 2000 RL 4 vax

### NAME

rl - RL11/ RL01 and RL02 disk interface

### SYNOPSIS

rlc0 at uba? csr 0177440 rl0 at rlc0 drive 0 rl* at rlc? drive ?

### DESCRIPTION

The rl driver is a typical block-device disk driver; block device I/O is described in physio(4).

The script MAKEDEV(8) should be used to create the special files; if a special file needs to be created by hand consult mknod(8).

### FILES

```/dev/rl[0-7][a-h]`
  block files
```/dev/rrl[0-7][a-h]`
  raw files

### DIAGNOSTICS

rl%d: operation incomplete
  The current command to the disk did not complete within the timeout period. This may be due to hardware failure or a heavily loaded UNIBUS.

rl%d: read data CRC
  The controller detected a CRC error on data read from the disk. Probably a bad disk pack.

rl%d: header CRC
  The controller detected a CRC error on header data read from the disk. Probably a bad disk pack.

rl%d: data late
  The controller was not able to transfer data over the bus fast enough to not overflow/underflow the internal FIFO, probably because a heavily loaded UNIBUS or mis-ordered UNIBUS devices.

rl%d: header not found
  The requested sector was not found before the timer expired. If this error is the only error then it may indicate a software bug.

rl%d: non-existent memory
  The controller tried to do DMA to/from a non-mapped address. This is a software bug.

rl%d: memory parity error
  The host memory data sent had a parity error. This is a hardware failure.

### SEE ALSO

hp(4), uda(4), up(4), syslogd(8)

### HISTORY

The rl driver has been around nearly forever.
A complete new rl driver showed up in NetBSD1.5.

### BUGS

Error handling is less than optimal.

Seeks should be interleaved between multiple disks.