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тАО07-05-2008 09:52 PM
тАО07-05-2008 09:52 PM
Backup problems with MSL2024
I have DL380G5 8TB storage server. This has SC11Xe HBA fitted to which is connected a MSL2024 LTO-4 Ultrium 1840 SCSI Drive Library. All firmware and drivers are latest versions.
Backup software is CA BrightStor 11.5 SP3 When running a backup it fails with the CA software reporting unknown hardware SCSI error, but the Server and Tape library show no hardware errors.
Rebuilt system with recovery DVD and installed CA BrightStor 12 and got same error.
Replaced server and library hardware completely with new and got same error with CA 11.5 and 12.
Rebuilt with DVD and installed Backup Exec v 12 and got same error!!! However, Backup exec forum said thet the HP Management Agents were know to cause this problem. Rebuilt original hardware, disabled HP Agents and installed CA 11.5 SP3 and backups now run fine. 1.2TB in 4.5 hours.
So, how do I get round this as I want to remote monitor server with Agents.
Anyone seen this before?
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тАО07-06-2008 10:48 AM
тАО07-06-2008 10:48 AM
Re: Backup problems with MSL2024
make sure you are using the latest firmware in the library controller. Does it happen almost around the same time?.
Is that perhaps 24 hours after a library reboot?. The native fibre drives do not have such problems with fibre agents as the scsi variant with the NSR but better disable them.
Regards,
Arend
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тАО07-06-2008 07:20 PM
тАО07-06-2008 07:20 PM
Re: Backup problems with MSL2024
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тАО07-06-2008 11:32 PM
тАО07-06-2008 11:32 PM
Re: Backup problems with MSL2024
Can you post a LTT support ticket here, taken asap after a failure please?.
Many, many things can cause a backup to abort, it maybe has nothing to do with hardware. You wrote that u used the SC11Xe adapter. It might be worth to emphasize that as not all adapters are supported with all libraries.
Can you please have a look at the compatibility table at hp.com/go/ebs.
Regards,
Arend
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тАО07-07-2008 01:34 PM
тАО07-07-2008 01:34 PM
Re: Backup problems with MSL2024
For that issue it's possible to work around the problem temporarily by loading an older version of storport.sys
HP is working with all of the different companies involved to figure out where the issue is and a solution will be made available as soon as possible.
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тАО07-08-2008 01:57 PM
тАО07-08-2008 01:57 PM
Re: Backup problems with MSL2024
An excerpt from that document for the registry entry that needs changed:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Enum\SCSI\
Value - BusyRetryCount
Type - DWORD
Data - 20 Decimal (default)
Range - number of retries
I don't know what the magic value is that works but 20 was probably just a guess for a good retry value. I would recommend you change it to 32 or 64.
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тАО07-30-2008 07:08 AM
тАО07-30-2008 07:08 AM
Re: Backup problems with MSL2024
Hopefully this resolves the issue.
I don't want to disable the HP agents, that is not a valid workaround in my opinion.
Some other thoughts: we only see the issue when both tape drives are powered on. If I disabled one, backups are successful. When both are enabled, it doesn't matter if they are both actively being used, it will fail with a Bus reset.
Crossing fingers for tonight's backups.
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тАО07-30-2008 07:10 AM
тАО07-30-2008 07:10 AM
Re: Backup problems with MSL2024
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тАО07-30-2008 09:59 AM
тАО07-30-2008 09:59 AM
Re: Backup problems with MSL2024
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тАО07-31-2008 06:23 AM
тАО07-31-2008 06:23 AM