客户对虚拟化环境进行物理机加内存,结果发现数据库服务器无法正常启动,报Buffer I/O error on dev错误

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通过对底层虚拟化磁盘进行分析,确定vg为centos,数据所在的磁盘组为root

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进一步恢复其中数据

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然后顺利打开数据库,数据0丢失

[oracle@xifenfei u01]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Mon Mar 13 23:27:42 2023
Version 19.13.0.0.0

Copyright (c) 1982, 2021, Oracle.  All rights reserved.

Connected to an idle instance.
 
SQL> startup
ORACLE instance started.

Total System Global Area 1.0100E+10 bytes
Fixed Size                 13625520 bytes
Variable Size            6241124352 bytes
Database Buffers         3825205248 bytes
Redo Buffers               19927040 bytes
Database mounted.
Database opened.
SQL> select status,count(1) from v$datafile group by status;

STATUS    COUNT(1)
------- ----------
SYSTEM           1
ONLINE          21