On 11/02/2011 12:37 AM, Korey Calmettes wrote:
I don't think the file is truncated.

What is the size of the file on disk?




Interesting stuff here when I run pragma integrity_check:

/data # sqlite3 test.db "pragma integrity_check;"
*** in database main ***
Page 480: unable to get the page. error code=522
Page 481: unable to get the page. error code=522
Page 482: unable to get the page. error code=522
On tree page 32 cell 3: Child page depth differs
Page 485: unable to get the page. error code=522
On tree page 32 cell 5: Child page depth differs
On tree page 32 cell 6: Child page depth differs
Page 487: unable to get the page. error code=522
On tree page 32 cell 7: Child page depth differs
On tree page 32 cell 8: Child page depth differs
Page 493: unable to get the page. error code=522
On tree page 32 cell 13: Child page depth differs
On tree page 32 cell 14: Child page depth differs
Page 495: unable to get the page. error code=522
On tree page 32 cell 15: Child page depth differs
On tree page 32 cell 16: Child page depth differs
Page 505: unable to get the page. error code=522
On tree page 45 cell 4: Child page depth differs
On tree page 45 cell 5: Child page depth differs
Page 421: unable to get the page. error code=522
On tree page 15 cell 1: Child page depth differs
Page 422: unable to get the page. error code=522
On tree page 15 cell 3: Child page depth differs
Page 424: unable to get the page. error code=522
On tree page 15 cell 4: Child page depth differs
On tree page 15 cell 5: Child page depth differs
Page 49: unable to get the page. error code=522
Page 33: unable to get the page. error code=522
Page 34: unable to get the page. error code=522
Page 472: unable to get the page. error code=522
Page 473: unable to get the page. error code=522
Page 474: unable to get the page. error code=522
Page 475: unable to get the page. error code=522
Page 476: unable to get the page. error code=522
Page 477: unable to get the page. error code=522
Page 478: unable to get the page. error code=522
Page 479: unable to get the page. error code=522
Error: disk I/O error

Also, the page size is 1024.

Korey

-----Original Message-----
From: sqlite-users-boun...@sqlite.org
[mailto:sqlite-users-boun...@sqlite.org] On Behalf Of Richard Hipp
Sent: October 31, 2011 2:32 PM
To: General Discussion of SQLite Database
Subject: Re: [sqlite] Disk I/O Error

On Mon, Oct 31, 2011 at 5:01 PM, Korey Calmettes
<kcalmet...@icontime.com>wrote:

Hello,

We are having a random problem with our system that has be puzzled at
this point.

First a little background.  We have an embedded system running an ARM
processor and JFFS file system.  We are running 3.7.7.1.  I e-mailed
about a month ago about enabling WAL on our system.  Found out that I
needed to set SQLITE_SHM_DIRECTORY to our tmpfs file system when
compiling as JFFS doesn't support shared mmap files.

This has been working fine, however throughout our testing, we have
been hitting a problem.  It seems that some tables are no longer
accessible giving a Disk I/O Error.  I logged into the command line
interface and replicated the problem.  I ran ".log stdout" and here
are the results.

sqlite>  select password from auth;
(522) statement aborts at 7: [select password from auth;]
Error: disk I/O error

However access to other tables will work without any problems.


Error code 522 is SQLITE_IOERR_SHORT_READ.  It is generated here:

      http://www.sqlite.org/src/artifact/07acbb3e074e?ln=3012

SQLite was trying to read N bytes and got back M byes where M>0 and M<N.

Perchance is your database file truncated?  What happens when you run
"PRAGMA integrity_check" on the database?  What is the page size of your
database?




I searched for how to read the log without success.  I am hopeful that

someone would be able to tell me what's going on.

Korey
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D. Richard Hipp
d...@sqlite.org
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