Re: mulan tape robot

[David Webber <dwebber@npl.uiuc.edu>]

Hi Brendan,

It's true that the archive is very slow compared to archiving to tape.  
The SCSI card is still in tb05, but any LVD SCSI card (?) should work 
for you (check the back of the tape drive for more info).  I can send 
one back if you're having problems.  There are a few in a drawer at UIUC.

You could also archive to a spare disk, then move that drive to the 
mulan barrack.  Check where the network connections go, specifically.  I 
think the bottleneck is the fiberoptic hub that connects to the PSI 
network.  It wouldn't help if you move data to the mulan barrack only to 
have both plugged into the same hub.

Best,
David


Brendan Kiburg wrote:

>Hi David,
>  We are having data rate difficulties similar to the ones you experienced
>near the end of your run.  We can write the data to tape without a
>problem, but we can't archive fast enough.  I planned to stop the archiver
>for a while and then play back the tapes using the other LTO tape robot
>that we have in the mulan barrack, thus allowing for a second,
>"remote" lazy archiver.
>
>  I went to mulan and found the tape robot, but saw that it was
>disconnected.  I checked the mulan elog and observed that the robot used
>to be connected to mulantb05, which was subsequently shipped to
>illinois.  Is the card still in tb05?  
>  If so, perhaps you could send it back with Dave or Peter, in case we are
>still having these difficulties in a week.
>
>Best regards,
>Brendan
>  
>