Backup started running 2x longer

110 pts.
Tags:
Backup
IBM
IBM Ultrium 3580
OS/400
SSRS
Hello,

We have a 3573 L2U drive which we are using as a standalone tape drive.  Our backup jobs started running nearly twice longer than our normal run time last week.  IBM SSR replaced the drive, cable and terminator.  However, still after replacing, backup still ran long.  Do you have any idea what is causind this long backup run? 

Here is the drive status/identity including the firmware version,

Vendor ID  IBM Product ID  ULT3580-TD3 Serial Number  9210331474 Firmware Revision  93G6 SCSI ID  4 SCSI Element Address  256 Control Path Drive  Yes Data Compression  Yes Interface Type  SCSI

Thanks in advance for your help.

Gerry

 



Software/Hardware used:
OS/400 V6R1M0
ASKED: August 22, 2011  5:32 PM
UPDATED: March 31, 2012  5:54 PM

Answer Wiki

Thanks. We'll let you know when a new response is added.

You should look at your disk IO while the backup is running as well as before and after. Maybe someone scheduled a defrag which would sure slow things down (or some other sort of processing).

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The most possible cause of your hard disk drive to take longer is because there might be a few or no storage space available on the hard disk drive. Remember that defragmenting involves only the hard disk drive, the more the available space of the hard disk drive, the easier to defrag.

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  • TomLiotta
    Do you have any idea what is causind this long backup run? It's unlikely that the drive status has much to do with it. We'll need to see a joblog of an earlier backup to compare against a current, longer backup. The steps in the backup will be logged with timestamps. One or more steps will be taking longer. We need to know what those stepsw are in order to know what a cause might be. Tom
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  • 400MYEYE
    Check to see if a background job is running, maybe a developer scheduled a job and didn't tell you.
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  • IS Questions
    First of all, sorry if I missed some information. Here's the summary of the sequence of events. 1. On Aug. 18, one of our backup jobs failed with an interface error, SRC code, CPF5101 and also MCH1668. Tape drive went into Failed status. The service action log shows, 63A09100 08/18/11 06:56:42 Perm TAP03 3580 63A09200 08/18/11 07:42:19 Perm TAP03 3580 63A09200 08/18/11 07:42:26 Perm TAP03 3580 63A09200 08/18/11 07:43:14 Perm TAP03 3580 B6005275 08/18/11 07:46:59 Info CMB05 2844 2. We tried varying on with IOP reset but timed out. 3. We powered off/on the tape drive. Vary on worked okay. Tested initialize tape and small backup; worked okay, 4. Our 3 nightly backup jobs ran nearly 2x as long as usual. 5. IBM SSR replaced the terminator, tape drive and cable on Aug. 19. 6. Still no go with normal backup run time, 2x longer again, including the full system save (restricted state backup over the weekend). 7. IBM SSR recommended to upgrade firmware on Aug. 22. 8. Nightly backup jobs still running long.
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  • Rickmcd
    This may have nothing to do with backup but I/O. Have you checked your Battery Cache to see if in Warning or Error status. If so it can effect I/O backup performance. If you did not add many new Libraries or changed your backup procedure this may be a point to look at.
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  • IS Questions
    There are no cache battery errors. As for the backup, we've been running the same setup for years and have not experienced any issues until Friday.
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  • TomLiotta
    If IBM responded on-site to a hardware service call, I'd expect that one of the first things done was a check of the problem log and the service action log. Anything like a cache battery should have been eliminated. The firmware upgrade suggestion seems reasonable given the recent service background. Was it done? And was the IOP reset ever completed? The hardware simply might not be running at optimum speed yet. Maybe. Tom
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  • IS Questions
    Thanks for all your responses; our problem had been resolved. See below. The firmware was upgraded but still no go. IBM SSR suggested to change IO card and install ptfs with IPL on the weekend. In as much as we were prepared to do this, we had requested IBM to escalate. We got a call back from Rochester and was requested to do an IPL IOP. Fortunately, we have no communcation resources and other devices attached to our IOP and we were able to IPL. We ran a few tests and our backup ran normally as it did.
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  • IS Questions
    [...] 2. Help solve the mystery of why one member’s backup started running 2x longer. [...]
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  • searay
    It says my computer is running slow because of a long running program. How/where do I find this program to correct it.
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  • TomLiotta
    It says my computer is running slow...   What is "it" that is telling you that? And can you explain what your comment has to do with this thread? If not, please open a new question of your own. When you do that, include enough details for us to know what you're asking about. One very useful piece of info would be the OS you are using, but other details may be needed. -- Tom
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