Linux on PE2950, PV220S and very slow PV124T

[David B.]

>> % dd if=/dev/zero of=/dev/nst0 bs=1M
>> dd: writing `/dev/nst0': Device or resource busy
>> 1+0 records in
>> 0+0 records out
>> 0 bytes (0 B) copied, 2.43528 seconds, 0.0 kB/s
>>     
>
> Ahh, might you have backup software running or something else going on?
> This shouldn't happen unless there is competition for access to the tape
> drive.  I've also seen this when drives were rewinding or doing
> something else like loading a tape, so try again.....also you didn't
> show the count= part.  You need to write at least 1 GB to a tape to get
> a reasonable timing.  1GB is 1M block size times 1000 (count=1000)
Hi John,
Yep it's strange.
Seems that i'm lucky today, it's working. :)

# mt -f /dev/st0 setblk 0
# time dd if=/dev/zero of=/dev/nst0 bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 8.94961 seconds, 117 MB/s

real    0m8.954s
user    0m0.001s
sys     0m0.363s

So PV124T is good isnt't it ?