Unsolved
This post is more than 5 years old
132 Posts
1
5063
Networker writes only half the tape and it shows it is full
Hello,
We are using Networker 7.6.2 that running on windows 2008 server. HP MSL8096 LTO4.
The problem we have is that the networker write to many tapes while most of the tapes is not full.
It write to tape1 just about 700GBm tape2 600GB while the tape capacity is 1.6TB and it shows that the tape is FULL.
Now, we are using about 18 tapes while they should be about 9 tapes
christopher_ime
2K Posts
0
November 5th, 2013 21:00
Please consider moving this question as-is (no need to recreate) to the proper forum for maximum visibility. Questions written to the users' own "Discussions" space don't get the same amount of attention and can go unanswered for a long time.
You can do so by selecting "Move" under ACTIONS along the upper-right. Then search for and select: "NetWorker Support Forum".
NetWorker Support Forum
ble1
14.3K Posts
0
November 6th, 2013 00:00
You screenshots shows not tape full, but backup level full - that's different thing. Decision when tape is full is not made by NetWorker. You can check daemon.raw for events prior to when tape is marked full and this will give you answer why tape was marked full.
coganb
736 Posts
0
November 6th, 2013 00:00
Hi,
Here are some reasons why this might be happening:
https://support.emc.com/kb/146429
-Bobby
jarady
132 Posts
0
November 7th, 2013 10:00
Hi Hrvoje,
The snapshot show the save set, and the tapes are full.
anyhow when I read the daemon.raw file and I found this:
39074 11/3/2013 2:44:06 PM nsrjobd JOBS notice: Completed full database purge in 0 min 1 sec. Records purged: 0
38758 11/3/2013 3:20:08 PM nsrd media warning: \\.\Tape2147483644 writing: The physical end of the tape has been reached.
42506 11/3/2013 3:20:08 PM nsrd media notice: LTO Ultrium-4 tape 000029L4 on \\.\Tape2147483644 is full
42506 11/3/2013 3:20:08 PM nsrd media info: WORM capable for device \\.\Tape2147483644 has been set
42506 11/3/2013 3:21:14 PM nsrd media info: WORM capable for device \\.\Tape2147483644 has been set
42506 11/3/2013 3:27:15 PM nsrd media info: verification of volume "000029L4", volid 1165360825 succeeded.
42506 11/3/2013 3:27:15 PM nsrd media notice: LTO Ultrium-4 tape 000029L4 used 643 GB of 800 GB capacity
42506 11/3/2013 3:27:34 PM nsrd write completion notice: Writing to volume 000029L4 completed
0 11/3/2013 3:27:34 PM nsrd Operation 72 started : Load volume `000162L4', volume id `4096941480'.
--------------------------------------------------------------------------------------------------------------
42506 11/3/2013 9:52:58 AM nsrd savegroup warning: Inactive files in group FULL_WINDOWS_STEP occupy 95.00 percent of the used space, which exceeds threshold of 30 percent configured for this group
38758 11/3/2013 9:52:58 AM nsrd savegroup notice: FULL_WINDOWS completed, Total 1 client(s), 1 Succeeded. Please see group completion details for more information.
7241 11/3/2013 9:52:58 AM savegrp nsrim run recently, skipping38758 11/3/2013 10:32:52 AM nsrd media warning: \\.\Tape2147483644 writing: The physical end of the tape has been reached.
42506 11/3/2013 10:32:52 AM nsrd media notice: LTO Ultrium-4 tape EFF138L4 on \\.\Tape2147483644 is full
42506 11/3/2013 10:32:52 AM nsrd media info: WORM capable for device \\.\Tape2147483644 has been set
42506 11/3/2013 10:34:57 AM nsrd media info: WORM capable for device \\.\Tape2147483644 has been set
42506 11/3/2013 10:38:06 AM nsrd media info: verification of volume "EFF138L4", volid 1282791754 succeeded.
42506 11/3/2013 10:38:06 AM nsrd media notice: LTO Ultrium-4 tape EFF138L4 used 774 GB of 800 GB capacity
42506 11/3/2013 10:38:24 AM nsrd write completion notice: Writing to volume EFF138L4 completed
0 11/3/2013 10:38:24 AM nsrd Operation 69 started : Load volume `000162L4', volume id `4096941480'.
bingo.1
2.4K Posts
0
November 7th, 2013 23:00
The reference values like 800GB depend on the media type - NW uses them only for calculating the media "%used" value.
Tapes are always written until they have successfully reached the physical EOT. But yours both reached PEOT. This is it. However, NW will set a tape to full prematurely due to unrecoverable errors.
Fullnes It may appear earlier (too many gaps and/or soft errors) but mostly later which of course also depends on the data and their final space (after being HW-compressed by the tape drive itself).
You do not really want to complain because you 'only reached "774 GB of 800 GB" capacity (less than 5% difference?).
643GB of 800 seems a bit low. But i would not be concerned on the first view. Just monitor and compare with other media.
Do not forget that you have other utilities (HP) to test the tape drives/media better.
Anonymous
5 Practitioner
5 Practitioner
•
274.2K Posts
0
November 7th, 2013 23:00
Have you looked at the firmware/microcode level of your library and tape drives and have you checked the device driver which you are using on windows ? because I have seen the same kind of issues in the past with other backup products too and they were related to what I mentioned above.
ble1
14.3K Posts
1
November 8th, 2013 15:00
I assume those are really LTO4 medias? (nothing stops you from using LTO3 media with LTO4 label). Now, if this is really LTO4 then native capacity is 800GB. This means that if you have enabled compression, you would get 1.6TB (2:1 compression). Usually, with native capacity, you should be able to reach 800GB. However, message about reaching the end of tape is the one passed by driver so NW does nothing wrong. Is this Windows or IBM driver?
jarady
132 Posts
0
November 9th, 2013 21:00
Guys,
I am using HP MSL 8096 Library and using LTO4 tapes 1.6TB with the OS windows 2008
Hrvoje,
How can I check if the compression enabled?
Thierry101
326 Posts
0
November 10th, 2013 13:00
Hi
Have you checked the option in LTT?
nmc2
268 Posts
0
November 11th, 2013 02:00
Also try cleaning the tape drive head. Once i had similar issue due to dirty drive head.
Contact device vendor and run test on the tape drive. Make sure its not a drive issue.
Regards,
Prajith
ble1
14.3K Posts
0
November 11th, 2013 03:00
Two ways:
- go to library and via panel check drive options
- via RMI connect to Web GUI and check it from there