On Wed March 5 2003 09:23, Brian Cuttler wrote:
>>From discussions on the list last week "I'd understood"* that
>the tape length and I assume** by extension the filemark size
>are used only to estimate tape capacity and determine what needs
>to be bumped or if a level zero could be advanced.
>
>What is the speed value used for ?
>
We have been told it is not used.  Its just informational.
>
>* Note, phrase "I'd understood" has no confirmed relevance to
> reality and may not be worth the electrons it was written with.
>
>> These dumps were to tape Daily001.
>> *** A TAPE ERROR OCCURRED: [[writing filemark: Input/output
>> error]]. I am getting regularish error as below.
>> It seems to be related to a long pause in the cycles as the
>> last halfcut partition is dumped prior to taping
>>
>> Here is my tapetype
>>
>> define tapetype Ultrium {
>>     comment "Ultrium LTO"
>>     length 101632 mbytes
>>     filemark 10 kbytes
>>     speed 13884 kbytes
>> }

You may want to rerun the above after shutting the drives 
compression off.

>> NB filemark WAS 0 kbytes, and as someone else has just queried
>> -- is this OK?
>> I set it up to 10 kbytes to actually 'make a space'

This also has little real effect.  Since you have a fast drive, I'd 
guess that you are not using a holding disk, so while the next hunk 
is being compressed, the tape soldiers on, writing null bytes till 
new data becomes available, thereby wasting storage space on the 
tape.  But thats just a SWAG, and no more connection to reality 
than yours :)

>> And no the actual dump size is not bigger than the tape size
>> (unless I am badly miscounting something...)

Also, if you are compressing, and the drive is also compressing, the 
data will grow by 10-20% and overflow the tape.  We do not 
recommend the use of the drives compressor since it hides the true 
capacity of the tape from amanda.

>> --------------------8<---------------------------------
>>
>> Some dumps may have been left in the holding disk.
>> Run amflush to flush them to tape.
>> The next tape Amanda expects to use is: Daily005.
>>
>> FAILURE AND STRANGE DUMP SUMMARY:
>>   halfcut    da0s3f lev 1 FAILED [out of tape]
>>
>>
>> STATISTICS:
>>                           Total       Full      Daily
>>                         --------   --------   --------
>> Estimate Time (hrs:min)    1:25
>> Run Time (hrs:min)         4:19
>> Dump Time (hrs:min)        2:45       0:15       2:30
>> Output Size (meg)       20657.3      774.2    19883.1
>> Original Size (meg)     36118.5     1854.0    34264.5
>> Avg Compressed Size (%)    57.2       41.8       58.0  
>> (level:#disks ...)
>> Filesystems Dumped           10          8          2   (1:1
>> 2:1) Avg Dump Rate (k/s)      2133.4      864.7     2262.7
>>
>> Tape Time (hrs:min)        0:15       0:02       0:13
>> Tape Size (meg)          6360.2      774.6     5585.6
>> Tape Used (%)               6.3        0.8        5.5  
>> (level:#disks ...)
>> Filesystems Taped             9          8          1   (2:1)
>> Avg Tp Write Rate (k/s)  7066.8     5633.7     7325.2
>>
>>
>> NOTES:
>>   planner: Incremental of wombat.bytecraft.au.com:da0s3f bumped
>> to level 2.
>>   planner: Full dump of spyder.bytecraft.au.com:da0s4e promoted
>> from 3 days ahead.
>>   planner: Full dump of spyder.bytecraft.au.com:da0s3g promoted
>> from 3 days ahead.
>>   planner: Full dump of halfcut:da0s2f promoted from 3 days
>> ahead. planner: Full dump of halfcut:da0s2a promoted from 3 days
>> ahead. planner: Full dump of spyder.bytecraft.au.com:da0s2f
>> promoted from 3 days ahead.
>>   planner: Full dump of wombat.bytecraft.au.com:da0s2a promoted
>> from 3 days ahead.
>>   planner: Full dump of wombat.bytecraft.au.com:da0s2f promoted
>> from 3 days ahead.
>>   planner: Full dump of spyder.bytecraft.au.com:da0s2a promoted
>> from 3 days ahead.
>>   taper: tape Daily001 kb 6512800 fm 9 writing filemark:
>> Input/output error
>>   driver: going into degraded mode because of tape error.
>>
>>
>> DUMP SUMMARY:
>>                                      DUMPER STATS           
>> TAPER STATS
>>
>> HOSTNAME     DISK        L ORIG-KB OUT-KB COMP% MMM:SS  KB/s
>> MMM:SS KB/s
>> -------------------------- ---------------------------------
>> ------------
>> halfcut      da0s2a      0   59380  19968  33.6   0:151304.8
>> 0:082597.4
>> halfcut      da0s2f      0  483220 188640  39.0   3:18 954.2
>> 0:286696.1
>> halfcut      da0s3f      1 2365768014640698  61.9  98:502469.0 
>> FAILED ----
>> spyder.bytec da0s2a      0  122080  97888  80.2   0:581696.8
>> 0:185434.3
>> spyder.bytec da0s2f      0  637700 159936  25.1   2:291074.1
>> 0:266130.4
>> spyder.bytec da0s3g      0     820    224  27.3   0:00 696.3  
>> 0:02 104.2
>> spyder.bytec da0s4e      0  216370 174880  80.8   2:011444.1
>> 0:286205.7
>> wombat.bytec da0s2a      0   79410  38752  48.8   0:44 872.9
>> 0:103730.8
>> wombat.bytec da0s2f      0  299500 112864  37.7   5:32 340.1
>> 0:205611.1
>> wombat.bytec da0s3f      2 114291505719648  50.0  51:091864.0
>> 13:017325.2
>>
>> (brought to you by Amanda version 2.4.3b4)

[... sig thats an infommercial, so I muted it :) ]

-- 
Cheers, Gene
AMD K6-III@500mhz 320M
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