ORA-25157: Specified block size string is not valid
Cause: An attempt was made to create a tablespace with a block size which is not supported.
Action: Specify one of the valid blocksizes i.e the standard blocksize or one of (2k, 4k, 8k, 16k, 32k) subject to the maximum and minimum blocksizes supported by the platform.
ORA-25157是由Oracle数据库抛出的错误，当你提交一个不正确的块大小字符串的时候出现的。该错误的官方解释如下：
“ORA-25157: Specified block size string is not valid
Cause: The specified block size was not valid.
Action: Verify that the block size is valid.”
正确处理ORA-25157错误的步骤一般如下：
1. 首先确认该块大小是否正确，检查块大小是否与允许的范围相匹配；
2. 确认该块大小字符串的输入，确保它能够被正确理解；
3. 按照ORACLE文档中所提供的正确块大小字符串，再次尝试执行操作。