Disk error on SolMan - VMWare

[Former Member]

Dear experts,

We're trying to install Solution Manager 7.1 (SYBASE ASE 15.7) on a Virtual Server Windows 2008 R2 running on VMWare.

This is for testing purpose.

The problem is that the installation finished sucessfully, but when we try to use the system we get a lot of commit errors and dumbs.

Checking the Sybase log located in  "sybase\SAM\ASE-15_0\install", we found a lot of Disk error.

server  I/O error detected during wait for BUF=0x00000000BD6568B0, MASS=0x00000000BD6568B0, Buf#=0, page=0x00000000B6864000, dbid=4, Mass vdevno=5, vpage=27949424, Buf lpage=3493678, Mass stat=0x6891110, Buf stat=0x1, size=16384, cid=0 ('default data cache'), Pinned xdes=0x0000000000000000, spid=0.

kernel  sddone: write error on virtual disk 5 block 27946040:

kernel  sddone: Windows NT system error 665: Unforseen error.

kernel  sddone: write error on virtual disk 5 block

server  An attempt was made to read logical page '3472708', virtpage '27781664' from virtual device '5' for database '' (4), object 'DDLOG' (386239733), index 'DDLOG' (0), partition 'DDLOG_386239733' (386239733). The page was not read successfully. You may have a device problem or an operating system problem.

00:0007:00000:00086:2013/06/30 09:44:18.75 server  Error: 694, Severity: 24, State: 10

00:0007:00000:00086:2013/06/30 09:44:18.75 server  An attempt was made to read logical page '3472708', virtpage '27781664' from virtual device '5' for database 'SAM' (4), object 'DDLOG' (386239733), index 'DDLOG' (0), partition 'DDLOG_386239733' (386239733). The page was not read successfully. You may have a device problem or an operating system problem.

00:0006:00000:00050:2013/06/30 09:44:38.47 server  Error: 694, Severity: 24, State: 10

00:0006:00000:00050:2013/06/30 09:44:38.47 server  An attempt was made to read logical page '3472708', virtpage '27781664' from virtual device '5' for database 'SAM' (4), object 'DDLOG'

The operating system team say they don't see any problem in the Disk or in the Server itself.

Can anybody advise me what could be the problem?

Is there any recommendation on install Solution Manager on VMWare environment?

Any help is welcome.

Junior V.

[Former Member · Accepted solution]

Hi Junior,

I am not sure if you have already looked into the below page,

http://www.sybase.in/detail?id=20393

I can see you are getting Server error 694 and below is the explanation.

Error 694

Severity

24

Error Message

An attempt was made to read logical page '%ld', virtpage '%ld' from virtual device '%d' for object '%ld' in database '%d'. The page was not read successfully. You may have a device problem or an operating system problem.

Note:

This message was introduced in Version 11.0.3 to improve the ability to diagnose 605 object ID mismatch errors. Some errors that previously raised the 605 error are now reported as 694 errors. These errors may be due to hardware problems.

Explanation

This error occurs when Adaptive Server tries to access an object but is unable to read the page mentioned in the message. Adaptive Server automatically issues a second read request to verify the consistency of the first read attempt. One of the following cases will be true:

• The second I/O request did not take place either, and the page header is unchanged by the I/O operation. Adaptive Server writes the following message into the error log:

  I/O did not occur, buffer contents are unchanged. Previous page in buffer = %ld Previous objid = %ld

• The second read request returned new information, but that information was incorrect. This indicates an unreliable disk or controller.
• The second read request was successful. The first read request may have failed due to a timing or caching problem on the device.

In all cases, Adaptive Server writes the following message into the error log:Suspect a Device or OS problem, %sand raises Error 694, resulting in a stack trace and breaking your connection to Adaptive Server.This error indicates hardware or operating system problems.

Action

• Save the entire Adaptive Server error log from the last boot to the time of the error.
• If the second read was successful, check whether dbcc checkalloc or dbcc checkdb is running concurrently with other activities on the server. Error 694 may occur when too many I/O's are requested from the server.
• If the second I/O attempt failed or if it returned a bad read, check if the device in question provides a caching mechanism. If so, turn off caching to see if this resolves the 694 error.
• If the error persists, determine what device(s) are responsible for the errors. Examine your operating system error log and correct hardware problems. See "Checking the Operating System Error Log" in "Encyclopedia of Tasks" for assistance.

Additional Information

Refer to the writeup for Error 605 for a discussion of potential causes of hardware error.

Versions in Which This Error is Raised

11.0.3 and later

[Former Member · Accepted solution]

Dear jagadish,

Thank you for the reply.

I was wondering if somebody has something to say about the environment used in the installation, I mean, VMWare and Solution Manager.

I would like to know if there is someting interesting to learn about it before format the server and restart everything.

Any comment is welcome.

Best regards,

Junior.

[Former Member · Accepted solution]

Hi Junior,

Logically.. SAP SOlution Manager is like any other SAP component. This runs on ABAP+Java and SAP BW concept is also embedded in it.

So from VMWare perspective whatever things need to be taken care for a SAP BW and ABAP+Java system applicable this component as well.

Thanks,

Jagadish,