Hi,
You're welcome. Could you please send us some log output (mainly the parts
telling that the volume is being marked Full and changing to another one in
the same pool)? Maybe this could help us to understand better this issue.
Best regards,
Ana
On Fri, May 27, 2016 at 3:19 PM, Rao, Uthra R. (GSFC-672.0)[ADNET SYSTEMS
INC] <uthra.r....@nasa.gov> wrote:
> Ana,
>
>
>
> *No*, I don’t have “Maximum Volume Bytes” configured in the Pool resource.
>
>
>
> Thank you.
>
>
>
>
>
> *From:* Ana Emília M. Arruda [mailto:emiliaarr...@gmail.com]
> *Sent:* Friday, May 27, 2016 5:03 AM
> *To:* Rao, Uthra R. (GSFC-672.0)[ADNET SYSTEMS INC]
> *Cc:* bacula-users@lists.sourceforge.net
>
> *Subject:* Re: [Bacula-users] LTO-7 tape drive settings in bacula 7.4.0
>
>
>
> Hello,
>
>
>
> Have you checked if you do not have a Maximum Volume Bytes configured in
> your Pool resource?
>
>
>
> Best regards,
>
> Ana
>
>
>
> On Thu, May 26, 2016 at 10:05 PM, Kern Sibbald <k...@sibbald.com> wrote:
>
> I recommend to remove the Maximum Network Buffer Size. Bacula will figure
> it out itself.
>
>
>
> On 05/26/2016 08:43 PM, Rao, Uthra R. (GSFC-672.0)[ADNET SYSTEMS INC]
> wrote:
>
> Kern,
>
>
>
> Okay, Thank you. I will try setting the block size to 512k to improve the
> speed of writing to the tape. What about the “Maximum Network Buffer Size
> = 65536*” *I have currently set in my configuration? Should I remove this
> or change the value I have set? Please let me know.
>
>
>
> Regards,
>
> Uthra
>
>
>
> *From:* Kern Sibbald [mailto:k...@sibbald.com <k...@sibbald.com>]
> *Sent:* Thursday, May 26, 2016 2:35 PM
> *To:* Rao, Uthra R. (GSFC-672.0)[ADNET SYSTEMS INC];
> bacula-users@lists.sourceforge.net
> *Subject:* Re: [Bacula-users] LTO-7 tape drive settings in bacula 7.4.0
>
>
>
> The defaults for both of those should work out of the box. However, by
> increasing the Maximum Block Size, you can probably improve the speed of
> writing to the tape. This is, of course, optional. I would still not set
> the block size any larger than 512K though.
>
> Best regards,
> Kern
>
> On 05/26/2016 08:16 PM, Rao, Uthra R. (GSFC-672.0)[ADNET SYSTEMS INC]
> wrote:
>
> Thank you all for taking the time to reply to my email.
>
>
>
> We are using LTO-7 tapes with the LTO-7 Tape drives. I don’t think the
> data transfer rate is an issue in our case. I am thinking of removing the “
> *MaxBlocksize*” and “*Maximum Network Buffer Size” *I have currently set
> for the tape drives so that it will use the defaults. I will then run a
> test backup to see if this helps.
>
>
>
> Regards,
>
> Uthra
>
>
>
>
>
> *From:* Kern Sibbald [mailto:k...@sibbald.com <k...@sibbald.com>]
> *Sent:* Thursday, May 26, 2016 7:56 AM
> *To:* Rao, Uthra R. (GSFC-672.0)[ADNET SYSTEMS INC];
> bacula-users@lists.sourceforge.net
> *Subject:* Re: [Bacula-users] LTO-7 tape drive settings in bacula 7.4.0
>
>
>
> Hello,
>
>
> The tape probably got an error. You should be able to see if there were
> problems by looking at dmesg output and Bacula output for the job that
> marked the tape full.
>
> The error, if there was one, is very likely coming from the fact that you
> set the block size too big. I believe that anything more than 512K will
> probably not improve performance much but it will increase significantly
> the chances of a write error.
>
> Try running some tests with 512K max block size and see if the tape fills
> up correctly.
>
> Best regards,
> Kern
>
>
>
> On 25/05/2016 20:04, Rao, Uthra R. (GSFC-672.0)[ADNET SYSTEMS INC] wrote:
>
> I have a Qualstar Tapeell library (RLS-87120) with three LTO7 tape
> drives. It is connected to the backup server directly through Fiber
> Channel. I am running bacula 7.4. I ran a test backup which completed
> successfully but I found that the LTO-7 Tape was not used up to its full
> capacity of 6TB. It wrote 2.6TB and marked the tape “FULL” then moved on to
> the next tape in the pool. I expected the backup to write 6TB to the tape
> before marking it “FULL”? Here is the information from my bacula-sd.conf:
>
>
>
> *Maximum File Size = 50G*
>
> * Maximum Network Buffer Size = 65536*
>
> * Maximum Block Size = 2097152*
>
>
>
> The MaxBlock: 8388608 is seen in the tapeinfo command on the tape drive0:
>
>
>
> # tapeinfo -f /dev/tapedr0
>
> Product Type: Tape Drive
>
> Vendor ID: 'IBM '
>
> Product ID: 'ULTRIUM-HH7 '
>
> Revision: 'FA11'
>
> Attached Changer API: No
>
> SerialNumber: '10WT004131'
>
> MinBlock: 1
>
> *MaxBlock: 8388608*
>
> SCSI ID: 0
>
> SCSI LUN: 0
>
> Ready: yes
>
> BufferedMode: yes
>
> Medium Type: 0x78
>
> Density Code: 0x5c
>
> BlockSize: 0
>
> DataCompEnabled: yes
>
> DataCompCapable: yes
>
> DataDeCompEnabled: yes
>
> CompType: 0xff
>
> DeCompType: 0xff
>
> BOP: yes
>
> Block Position: 0
>
> Partition 0 Remaining Kbytes: -1
>
> Partition 0 Size in Kbytes: -1
>
> ActivePartition: 0
>
> EarlyWarningSize: 0
>
> NumPartitions: 0
>
> MaxPartitions: 3
>
>
>
> I am not sure if the issue I am seeing with the tape not being used to its
> full capacity is due to the “Max Block size” I have set? What is the
> recommended setting for LTO-7? If anybody could share your knowledge about
> this I would really appreciate it. I did some search on the internet and
> could not find any useful information.
>
>
>
> Thank you
>
>
>
>
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> restrictions. Mobile Device Manager Plus allows you to control only the
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