Tablespace creation problem in rac

Question

hello all, i have been installed rac with asm on win 2003 but when i want to create tablespace, sometimes i have this error:
ORA-19502: write error on file "+DATA/billsp01.dbf", blockno 8783744
(blocksize=8192)
ORA-27070: async read/write failed
please help me?

Answer 1

Oldbarrel wrote:
Billy, I'm just trying to understand why you posed the question "Do you run this via ASM as the volume manager for Oracle? Or do you use a cluster file system, direct raw devices or something else? " Can you clarify? Sorry. Did not phrase that question correctly. You can run ASM directly on the "raw/native" devices, or run it on devices managed by a disk volume manager. For example, you can use a disk volume manager to create a striped and mirror set of logical devices. You can then have ASM use these logical devices instead of the underlying "native" devices.
This impacts just who is responsible at the lower level of the I/O layer.
As you correctly pointed out, a CFS is not relevant here as an ASM diskgroup is used. Apologies for that foot-in-the-mouth comment. :-)
Async I/O on Windows (back when I was still doing Win32 s/w) was called overlapped I/O. And there were a couple of ways to deal with the completion part of the I/O. Do you have the kernel alert you (alertable I/O)? Do you actively wait (WaitForMultipleObjects) on async handles? Do you create a pool of threads to dequeue async I/O (GetQueuedCompletionStatus)? Each approach had its pros and cons.. and perhaps the OP is running into where the method used does not scale or work well for the underlying driver that does the actual I/O. (which makes me wonder just what method Oracle uses in this regard)