Re: Raid Arrays and Power Loss

From: zhu chao <chao_ping_at_vip.163.com>
Date: Tue, 16 Sep 2003 07:24:55 -0800
Message-ID: <F001.005D00DB.20030916072455@fatcity.com>

Hi, what is your OS and filesystem?

Regards
zhu chao
msn:chao_ping_at_163.com
www.cnoug.org
----- Original Message -----
To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Tuesday, September 16, 2003 12:34 PM

> Last Friday was hot here, and rumor has it our 230 KV power line sagged
and touched some tree branches. The local power company shut it off. Leaving our systems to depend on UPS. About 30 minutes afterwards one system produced these errors. This was jus before the system went dead
>
> Fri Sep 12 12:58:40 2003
> Errors in file /opt/oracle/admin/BBRO/bdump/bbro_ckpt_1420.trc:
> ORA-00206: error in writing (block 3, # blocks 1) of controlfile
> ORA-00202: controlfile: '/u1/oradata/BBRO/BBROcntrl01.ctl'
> ORA-27063: skgfospo: number of bytes read/written is incorrect
> SVR4 Error: 5: I/O error
> Additional information: -1
> Additional information: 8192
> Fri Sep 12 12:58:42 2003
> Errors in file /opt/oracle/admin/BBRO/bdump/bbro_ckpt_1420.trc:
> ORA-00221: error on write to controlfile
> ORA-00206: error in writing (block 3, # blocks 1) of controlfile
> ORA-00202: controlfile: '/u1/oradata/BBRO/BBROcntrl01.ctl'
> ORA-27063: skgfospo: number of bytes read/written is incorrect
> SVR4 Error: 5: I/O error
> Additional information: -1
> Additional information: 8192
> Fri Sep 12 12:58:42 2003
> CKPT: terminating instance due to error 221
> Instance terminated by CKPT, pid = 1420
> --------------------------------------------------------------------------

---

> Things look pretty shaky here. When things were restarted the following
error was produced.
> Fri Sep 12 13:32:01 2003
> ORA-00204: error in reading (block 1, # blocks 1) of controlfile
> ORA-00202: controlfile: '/u1/oradata/BBRO/BBROcntrl01.ctl'
> ORA-27091: skgfqio: unable to queue I/O
> SVR4 Error: 6: No such device or address
> Additional information: 1
>
> The raid array had not been powered on
> --------------------------------------------------------------------------

---

> However
> Fri Sep 12 15:33:08 2003
> ORA-00202: controlfile: '/u1/oradata/BBRO/BBROcntrl01.ctl'
> ORA-27037: unable to obtain file status
> SVR4 Error: 2: No such file or directory
> Additional information: 3
> Fri Sep 12 15:33:11 2003
> ORA-205 signalled during: alter database mount...
>
> Now the file system is available, but the file itself has disappeared. It
was not corrupted, just disappeared. We duplex a copy to an internal disk. So recovery was easy.
>
> However once this was fixed
>
> Fri Sep 12 16:18:58 2003
> Thread recovery: start rolling forward thread 1
> Fri Sep 12 16:18:58 2003
> Errors in file /opt/oracle/admin/BBRO/udump/bbro_ora_1804.trc:
> ORA-00313: open failed for members of log group 3 of thread 1
> ORA-00312: online log 3 thread 1: '/u2/oradata/BBRO/redo0301.log'
> ORA-27037: unable to obtain file status
> SVR4 Error: 2: No such file or directory
> Additional information: 3
> ORA-313 signalled during: ALTER DATABASE OPEN...
> --------------------------------------------------------------------------

---

> These files are on a RAID 1 LUN. Both copies of the file are gone.
Again not corrupted but gone. I don't know if using duplexing rather than RAID 1 would have mattered here, but I am changing things so that one group of redo logs is on internal disk and written via the duplexing method.
>
>
>
>
> Ian MacGregor
> Stanford linear Accelerator Center
> ian_at_SLAC.Stanford.edu
>
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: MacGregor, Ian A.
> INET: ian_at_SLAC.Stanford.EDU
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: zhu chao
  INET: chao_ping_at_vip.163.com

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Received on Tue Sep 16 2003 - 10:24:55 CDT