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тАО01-06-2010 02:06 PM
тАО01-06-2010 02:06 PM
Re: LTT: Support Ticket doesn't include all LTO Drive Assessment Data
What is happening here is that the assessment test using a built in test which suspends the normal logging and reports all of it's data in the results. If the test encounters a problem that it considers fatal it will stop right away instead of running the full cycle since that won't change the pass/fail results.
Since the normal logging was suspended during the built in test that assessment runs the results don't show up in the device analysis section of the support ticket. There is a test history section that will show the same failure that you saw at the end of the test.
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тАО01-06-2010 02:18 PM
тАО01-06-2010 02:18 PM
Re: LTT: Support Ticket doesn't include all LTO Drive Assessment Data
I'm a bit worried, because this is now the 4th FC LTO4 drive that fails. The 2 SCSI drives in the Lib seem to be more reliable, even though they are much more in use.
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тАО01-06-2010 02:38 PM
тАО01-06-2010 02:38 PM
SolutionI'm concerned that you have had several drive failures. That isn't normal and there really shouldn't be any difference between FC and pSCSI drives in the head/media interface. Is there any chance that you have media pools and the media used with the FC drives is different from the media used with the pSCSI drives. I have run across a few pieces of abrasive media that can wipe out heads. It is also possible for media to get contaminated and transfer the contamination to the heads when loaded into a drive. Sometimes that can be corrected by cleaning the drive multiple times.
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тАО01-06-2010 02:47 PM
тАО01-06-2010 02:47 PM
Re: LTT: Support Ticket doesn't include all LTO Drive Assessment Data
Both tapes were used in the SCSI drives after that and didn't show any issues.
I'll repeat the test with 2 new tapes after cleaning the drive's head several times (again). I'll attach the logs then, this may take some days.
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тАО01-13-2010 11:15 AM
тАО01-13-2010 11:15 AM
Re: LTT: Support Ticket doesn't include all LTO Drive Assessment Data
Attached is the RsltLog.ltt with the results of all 3 tests.
Is it possible to see, why the FC drive is bad?
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тАО01-13-2010 11:38 AM
тАО01-13-2010 11:38 AM
Re: LTT: Support Ticket doesn't include all LTO Drive Assessment Data
In this mode it is fine to continue to use the drive and the write threshold is so high that there should never be any issue with reads but the performance and capacity may not quite meet specs.
I might mention that the first drive you tested is within specifications but also shows that it is using a fair amount of rewrite space.
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тАО01-13-2010 12:11 PM
тАО01-13-2010 12:11 PM
Re: LTT: Support Ticket doesn't include all LTO Drive Assessment Data
I'll contact our dealer and let him replace the drive, maybe the SCSI drive too.
Still wondering why we have so many bad LTO-4 drives. We use a tool named Veritape (http://www.mptapes.com/) to check the tape regularly. Many of our LTO-4 tapes have a score of 75-90 after 1,5 years of usage, some are only writen 2-3 times. Our LTO-3 tapes (IBM LTO-3 drive), all have a score of >90 after more than 3 years. Never had a problem with the LTO-3 drive or a single tape. That makes me worry...
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тАО01-13-2010 02:00 PM
тАО01-13-2010 02:00 PM
Re: LTT: Support Ticket doesn't include all LTO Drive Assessment Data
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