DLT tape / no streaming

[Dan Nelson]

In the last episode (Apr 20), Konrad Heuer said:
> I use a Benchmark DLT tape drive to backup data on my DELL PowerEdge
> 2650 system; syslog says:
> 
> Apr 20 09:09:02 gwdu111 /kernel: sa0 at ahc0 bus 0 target 6 lun 0
> Apr 20 09:09:02 gwdu111 /kernel: sa0: <BNCHMARK VS640 5032> Removable Sequential Access SCSI-2 device
> Apr 20 09:09:02 gwdu111 /kernel: sa0: 20.000MB/s transfers (10.000MHz, offset 15, 16bit)
> 
> The problem I see is that data flow is not steadily streaming; the
> tape drive is operating in start-stop-mode.

What blocksize are you using?  If you're just using tar, the default of
10k is too small.  Try 64k ("tar cvb 128 /usr", for example).
 
-- 
	Dan Nelson
	dnelson at allantgroup.com