Looking at the MS site I saw the following:
PRB: HrBackupClose in an Online Backup Becomes Unresponsive (Q182237)
The information in this article applies to:
The information in this article applies to:
Exchange Development Kit (EDK), version 5.0
SYMPTOMS
When you perform an online backup of a local Exchange Server,
HrBackupRead preceded by HrBackupClose causes the program to become
unresponsive.
RESOLUTION
Perform the online backup from a remote computer.
STATUS
Microsoft is researching this problem and will post new information
here in the Microsoft Knowledge Base as it becomes available.
MORE INFORMATION
Steps to Reproduce Behavior
The Backtest.c sample (part of the Exchange Software Development Kit
[SDK]) demonstrates the problem if we change the EcBackupFile
function to quit the backup routine before a full store as shown in
the example below:
EcBackupFile(HBC hbcBackupContext,SZ szFile,HANDLE hBackupFile)
{
...
// Read the next chunk from the database.
hrStatus = HrBackupRead(hbcBackupContext,pvBuffer,cbToRead,
&cbRead);
// Close file - call becomes unresponsive if performed locally.
HrBackupClose(hbcBackupContext);
//HrBackupEnd(hbcBackupContext);
if (hrStatus == ERROR_SUCCESS)
{
liBytesRead.QuadPart += cbRead;
}
...
}
So, probably, your problem actually stems from Exchange.
Cordiali saluti / Best regards
Gianluca Perilli
Gianluca Perilli
Tivoli Customer Support
Via Sciangai n° 53 - 00144 Roma (Italy)
"Luecke, Wolf-Christian
(K-DOI-44)" To: ADSM-L AT
VM.MARIST DOT EDU
<wolf-christian.luecke@VOL cc:
KSWAGEN.DE> Subject: unknown
API-Error "425"
Sent by: "ADSM: Dist Stor
Manager"
<ADSM-L AT VM.MARIST DOT EDU>
06/07/2002 03:12 PM
Please respond to "ADSM:
Dist Stor Manager"
> Dear specalist and customers,
>
> I need some help for the TDP 2.2 Product of our Exchange Servers.
> We backed up our Information-Stores over a GB/Ethernet tcp/ip connection
> with very bad performance and long durations.
> After some tunings we got an "unknown API-Error" Code 425.
>
> But first some Hardwareinformations:
> We use Compaq-Server with four 450 MHz prozzessors, 4 GB Ram,
> GB/Eth.-card, Exhange 5.5 incl. SP4, Win NT 4.0 incl. SP 6a,
> TSM B/A Client 4.2.1.16, TDP 2.2 and in the Backend a Comparex Tetragon
> Disk-Subsystem.
>
> To tune the performance we opened a problemrecord with IBM and changed
> some parameters (Buffersize from 1024 to 8192 and Buffers from 3 to 8).
> After this tunings we got the first time the "code 425" and we doesn 't
> got out of this Problem yet by the way of uesing GB/Ethernet.
> Does anyone have also bad Experiance with this Error ?
>
> IBM told us, that this problem is based on the Microsoft API-Interface.
> There should be an HRBACKUPREAD-Problem with filling up the Buffers with
> Datas as fast as it should be done.
> The time is probably too long and than it becomes a timeout followed by
> the unknown API-Error.
> Is there someone who can help us?
> May a lot of TDP users have the same, unexplained problem.
> It would be nice to here of you soon.
>
> kindley regards
>
> Wolf-Christian Lücke
>
> K-DOI-44
> Volkswagen AG Wolfsburg
> Storage Management
> Windows Platform
>
> Tel.: 05361/9-22124
> E-Fax: 05361/9-57-22124
>
> E-Mail: mailto:wolf-christian.luecke AT volkswagen DOT de
>
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