Am 13.03.20 um 08:28 schrieb Pierre Bernhardt:
> Am 10.03.20 um 20:27 schrieb Pierre Bernhardt:
>> Write failed at block 8758373. stat=-1 ERR=Auf dem Gerät ist kein 
>> Speicherplatz mehr verfügbar
>> btape: btape.c:411-0 Volume bytes=565.0 GB. Write rate = 25.08 MB/s
>> btape: btape.c:612-0 Wrote 1 EOF to "HP Ultrium 4-1" 
>> (/dev/tape/by-id/scsi-HU1914570A-nst)
> 
> Thats very interesting. On the other drive which can store ~ 750-800 GiByte 
> (drive 1)
> pcp shows me for the btape test ~ 80 MByte/s:
> 
> # Device         r/s     w/s  kb_r/s  kb_w/s   r_pct   w_pct   o_pct    Rs/s  
>  o_cnt
> st0             0.00 1259.59       0   81258    0.00   98.23   98.23    0.00  
>   0.00
> 
> So it looks really there is really an issue on the drive 0 or the connection 
> path.
> I will wait for the end of the both tests
> (btape on drive 1 and backup test on drive 0)
It's really dependend on the tape drive. With same tape on the other drive the
btape test will write many more data on this tape:

Write failed at block 12611722. stat=-1 ERR=Auf dem Gerät ist kein 
Speicherplatz mehr verfügbar
btape: btape.c:411-0 Volume bytes=813.6 GB. Write rate = 79.21 MB/s
btape: btape.c:612-0 Wrote 1 EOF to "HP Ultrium 4-2" 
(/dev/tape/by-id/scsi-HU19145705-nst)

The backup test shows me not the best:

# Device         r/s     w/s  kb_r/s  kb_w/s   r_pct   w_pct   o_pct    Rs/s   
o_cnt
st1             0.00  259.29       0   16727    0.00   79.75   79.75    0.00    
0.00
st1             0.00  259.19       0   16721    0.00   79.75   79.75    0.00    
0.00
…

16 MByte/s is to less.

And the backuptest shows me on drive 0 only a stored size of 475 MByte.

I would like to check FC connection for lip resets, error stats and so on.
I checked the "files" in /sys/class/fc_host/host?/statistics but all which could
have a problem value shows me only 0x0 values.
So my first guess is there is no really problem on the hba-drive-connections.

I will now try to clean the drive with a fresh cleaning tape and use btape
again for a test. I think I will not get big different result, but it's
a try.

Cheers,
Pierre



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