数据库全备。错误如下，偶尔也会有成功，多数是失败。显示成功的时候，持续了6个多小时，但是显示已取消输出字节。那这个算是成功全备了吗？失败的几次，也都是持续好几个然后失败。
RMAN-03009: failure of backup command on t1 channel at 11/14/2016 02:35:12
ORA-19502: write error on file "fwskfullbak1_94rkrvvb_68900_927858667", blockno 10900481 (blocksize=512)
ORA-27030: skgfwrt: sbtwrite2 returned error
ORA-19511: Error received from media manager layer, error text:
asdf_output_section1() failed
xdr=0x110716150: bp=0x1107162b0: send_len=262144: type=12800: fhand=0x1107164d0: wrapper=0x1107164f0: directp=0x110716550 (1:4:32)
Recovery Manager complete.
The backup process failed:
RMAN exited with return code '1'.
Exiting with error:
RMAN exited with return code '1'.
这个 error text：asdf_output_section1() failed 有什么作用？可以根据这个了解原因？该怎样对这个错误文本入手呢？EMC有错误代码查询支持什么的吗？
软件分析对比备份集时间过长？set limit channel 可以限制备份集大小？
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