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тАО01-13-2005 02:32 AM
тАО01-13-2005 02:32 AM
Scenario: MSL5030 LTO Library (FW 0430) with a LTO Drive (FW E38W) connected to a SAN via a onboard E1200 (FW 5606). While running a backup (Data Protector 5.1 with necessary patches) an error occurs on the Tape which raises and exception on the Tape Library. The E1200 interprets this exception as some sort of hardware error and reboots itself.
Surely this is incorrect? A problem with a faulty tape should not cause a re-initialize of the complete E1200. The exception being raised is internal between the E1200 and MSL5030(?) so I cannot see software being involved unless DP5.1 is causing this TLB exception on the Library.
Recently another site with a slightly older version of E1200 Firmware has done the same thing after a couple of errors on a tape. Any ideas? Sample of the E1200 event logs attached.
Solved! Go to Solution.
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тАО01-19-2005 05:40 AM
тАО01-19-2005 05:40 AM
Re: TLB Exception causes E1200 to reboot
first, log on to the serial port and reset to default value the NSR, this will reset some filds inside the unit used to store data by the bios.
second try to downgrade the version to the previous one and observe if it will solve
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тАО02-08-2005 09:21 PM
тАО02-08-2005 09:21 PM
Re: TLB Exception causes E1200 to reboot
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тАО02-24-2005 09:29 PM
тАО02-24-2005 09:29 PM
Re: TLB Exception causes E1200 to reboot
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тАО02-26-2005 02:31 AM
тАО02-26-2005 02:31 AM
Re: TLB Exception causes E1200 to reboot
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тАО03-02-2005 02:00 AM
тАО03-02-2005 02:00 AM
Re: TLB Exception causes E1200 to reboot
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тАО03-21-2005 06:34 PM
тАО03-21-2005 06:34 PM
Re: TLB Exception causes E1200 to reboot
(idea was to disable the port on the switch and simply enable it to be able to manage the NSRs)
The only solution is to pull ethernet and plug it in when you need to manage the router.
This problem exits since i use these routers and HP (or Crossroads) don't get this problem fixed, so it's a waste of time going back to an older version!
Bernhard
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тАО04-08-2005 01:53 AM
тАО04-08-2005 01:53 AM
Re: TLB Exception causes E1200 to reboot
Even if there may be some errors on a tape or a drive is acting up it should NOT cause the E1200 to reboot - this just does not make sense. I have attached a E1200 report from one of the two problem sites.. any advice would be most welcome.
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тАО04-18-2005 06:31 AM
тАО04-18-2005 06:31 AM
Solution---
Fixed between versions 5606 and 5669
Several fixes for Assertions and TLBs
FC ports with nothing attached will no longer fill up the Event Log
The default Target Rest mode is now Alternate
Several SCSI and fibre protocol fixes to improve reliability
Fixed an issue with tape spanning
---
2) If you are still having problems after that, then see if you can eliminate them by disconnecting the LAN (as a short term solution).
3) If the product is still under support, call your HP support center and open a case to investigate root cause.
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тАО04-18-2005 01:57 PM
тАО04-18-2005 01:57 PM
Re: TLB Exception causes E1200 to reboot
We took a look at the event logs you provided. There were two snipits that showed one TLB each on two routers back in January, one on 5.4.25, and another on 5.6.06. We'll check to see if there's anything the code addresses might reveal, but without a previous boot trace there's not much to go on.
The more recent report page you provided does not show any TLBs or reboots since 2/10/05 (start of the log). It does show two SCSI bus resets after a SCSI "write buffer" command (3C) to the drive failed to be sent. The are also 3 errors returned from a drive at different times (2 hardware errors, one medium (tape) error).
Can you provide us the report page for the other router?
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тАО04-18-2005 02:03 PM
тАО04-18-2005 02:03 PM
Re: TLB Exception causes E1200 to reboot
You mention that HP has not been able to resolve your issue. Have you provide trace logs to HP for analysis?
If you update to 5.6.69 and still see issues related to network connectivity, I'll be happy to have the engineering team review the router logs to see if we can determine the cause.
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тАО04-20-2005 02:54 AM
тАО04-20-2005 02:54 AM
Re: TLB Exception causes E1200 to reboot
I've confirmed that the TLB you had on 1/8/05 with 5.4.25 has been fixed in 5.6.06.
The second TLB (different issue) with 5.6.06 has not been reported before. If that problem reoccurs (with 5.6.69) we would be interested in trace logs so we can investigate further.
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тАО04-20-2005 03:42 AM
тАО04-20-2005 03:42 AM
Re: TLB Exception causes E1200 to reboot
I will upgrade the other router that is on 5.6.06 to the new 5.6.69 firmware as soon as possible and give it a test. After the two SCSI bus resets on the 5.6.0.6 router occurred earlier in April we removed one of the 'dodgy' tapes from the backup cycle and gave the drive a good cleaning and it has been holding up since.
Will do the upgrade and we take it from. Much appreciated!! Ian
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тАО04-20-2005 04:07 AM
тАО04-20-2005 04:07 AM
Re: TLB Exception causes E1200 to reboot
That's good to hear. Keep us posted if you have any issues with 5.6.69.
Here's the problem that was fixed in 5.6.06:
* Previously, if the buffered tape write option was used and the write command was aborted just before the drive responded with an error, then the router might reboot with a TLB message recorded in the router Event Log. This issue has been resolved.
A bad tape or other issue causing drive write problems needed to occur to expose the potential for that TLB.
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тАО04-20-2005 10:58 PM
тАО04-20-2005 10:58 PM
Re: TLB Exception causes E1200 to reboot
I have also attached the router report file done just after the upgrade. I will monitor and let you know how it goes. Thanks for the feedback so far.
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тАО04-20-2005 11:16 PM
тАО04-20-2005 11:16 PM
Re: TLB Exception causes E1200 to reboot
Have you run aa "acceptance test" on your ultrium drive, it report sense code 04 44 00 that seems to be an internal error, it may be the source of your trouble
marino
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тАО04-21-2005 03:33 AM
тАО04-21-2005 03:33 AM
Re: TLB Exception causes E1200 to reboot
I am quite happy that the drive is ok at this stage. The occasional errors being experienced occur during high backup I/O and the fact that the E1200 reboots is the primary concern. I am hoping the new 5.6.69 firmware helps resolve this, even when a problem occurs writing to the tape the router should be rock solid and not reboot. We will be re-using a suspect tape this evening just to give it a good go ;-)
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тАО04-21-2005 08:07 AM
тАО04-21-2005 08:07 AM
Re: TLB Exception causes E1200 to reboot
As Marino said, the 0x04/0x4400 sense data from the drive says "Internal Target Failure", which typically means the drive encountered some hardware error, or a hardware condition (e.g. interrupt) that it was not expecting. There were a few cases of that error being reported, with the most recent at 04/21/2005 00:24:55. That does not indicate a restart of the router around that time.
One possible cause of this drive error is mutliple hosts attempted to communicate to the drive at the same time. This can happen if the drives are mapped to more than one host, and a host not performing the backup has an application or service running that does polling. There's an issue with win2003 that cases test unit ready commands to be sent down. Do you have any win2003 systems on the SAN that see the library? Windows RSM should also be disabled for these devices (unless needed by the backup app on the backup server).
The report page you provided did show a unit restart on 04/20/2005 22:19:43, but there were no errors prior to that. Is that the reboot you are referencing?
It's possible that the previous trace log would have captured some useful info on this, but the firmware update cleared it out.
Should you have another failure, capturing the full router report page and collecting an LTT support ticket from the drive as soon as possible, would allow us to have the best info to help identify the cause.
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тАО04-22-2005 12:22 AM
тАО04-22-2005 12:22 AM
Re: TLB Exception causes E1200 to reboot
Yes, the unit restart on 04/20/2005 22:19:43 is the latest reboot I was referencing.
There was no problem last night and if another issue occurs I will capture the full router report page and collect a LTT support ticket as requested. Thanks for all the help on this so far.
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тАО04-22-2005 12:42 AM
тАО04-22-2005 12:42 AM
Re: TLB Exception causes E1200 to reboot
So I suggest if you have the agents installed to upgrade to last release and to stop the related component
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тАО04-22-2005 12:55 AM
тАО04-22-2005 12:55 AM
Re: TLB Exception causes E1200 to reboot
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тАО05-15-2005 09:31 PM
тАО05-15-2005 09:31 PM
Re: TLB Exception causes E1200 to reboot
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тАО05-15-2005 09:36 PM
тАО05-15-2005 09:36 PM