scn(1M)

NAME

scn — scan an HP SCSI disk array LUN for parity consistency

SYNOPSIS

scn -i number_of_initiators device_file

DESCRIPTION

scn scans the disks of the LUN in an HP SCSI disk array identified by the character device file device_file. The parity information for any block reporting inconsistent parity is corrected by an immediate call to rpr.

RETURN VALUE

scn returns the following values:

0

Successful completion.

-1

Command failed (an error occurred).

DIAGNOSTICS AND ERRORS

Errors can originate from problems with:

scn
SCSI (device level) communications
system calls

Error messages generated by scn:

usage: scn -i <num initiators> <special>: scn encountered an error in command syntax. Enter the command again with all required arguments, in the order shown.
scn: LUN # too big: The LUN number, derived from the device file name, is out of range.
scn: Not a raw file: Utilities must be able to open the device file for raw access. That is, you must specify a character device file rather than a block device file.
scn: LUN does not exist: The addressed LUN is not configured, and is not known to the array controller.
scn: Not an HP SCSI disk array: The device being addressed is not an HP SCSI disk array.

SCSI (device level) communication errors:

Sense data associated with the failed operation is printed.

Error messages generated by system calls:

scn uses the following system calls:

malloc(), free(), stat(), open(), close(), fopen(), fclose(), read(), write(), and ioctl().

Documentation for these HP-UX system calls contains information about the specific error conditions associated with each call. scn does not alter the value of errno. The interpretation of errno for printing purposes is performed by the system utility strerror().

EXAMPLES

To scan the LUN at /dev/rdsk/c2t0d0 on a Series 800 computer with two hosts (initiators) attached:

scn -i 2 /dev/rdsk/c2t0d0 

DEPENDENCIES

The HP C2425 and HP C2427 disk arrays are only supported on Series 700 systems running HP-UX version 9.0X.

The HP C2430 disk array is supported on Series 700 and 800 systems running HP-UX versions 9.0X and 10.0X.

AUTHOR

scn was developed by HP.