Hi,

I'm unable to ascertain the cause of this backup failure - the Oracle errors
point to a disk problem, but then 'inappropriate ioctl for device' looks
like there is a problem with the destination device, not the source.

Starting backup at 22-may-2009 14:44:34
current log archived
allocated channel: ORA_SBT_TAPE_1
channel ORA_SBT_TAPE_1: sid=139 devtype=SBT_TAPE
channel ORA_SBT_TAPE_1: Data Protection for Oracle: version 5.4.1.0
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 05/22/2009 14:45:08
ORA-19587: error occurred reading 512 bytes at block number 1
ORA-27091: unable to queue I/O
ORA-27072: File I/O error
SVR4 Error: 25: Inappropriate ioctl for device
Additional information: 4
Additional information: 1

Recovery Manager complete.
+ STATUS=1

STATUS=1
Fri May 22 14:45:08 BST 2009: Backup failed
Fri May 22 14:45:08 BST 2009: Finished
swisp012#


Any help wholly appreciated!

Cheers,
Matthew