On Sun, Aug 26, 2001 at 09:13:39PM -0400, Thor Lancelot Simon wrote:
> 
> On several different machines, all with "options NTP" and ntp4, with
> several different SCSI host adapters, both in 1.5 and in current with
> thorpej-scsipi, I've noticed that if I push the 'st' driver hard, two
> things happen:
> 
> 1) Output periodically pauses; the result is that the tape doesn't stream
>    for more than perhaps 30 seconds at a time.  Whether I have four striped
>    SCSI disks feeding a DLT8000 on a separate SCSI bus or a single IDE disk
>    feeding a DLT2000XT, I can sustain well above the drive's continuous
>    write rate for some time, but inevitably there's a pause that causes
>    the tape to stop streaming.
> 
> 2) ntpd periodically must adjust the clock by about 0.5-1.5 *seconds* while
>    the tape drive is in use.

Do you see complete wedges of the machine (keyboard input stops, etc ..) ?

--
Manuel Bouyer, LIP6, Universite Paris VI.           Manuel.Bouyer@lip6.fr
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