Author: "Maarten Boot (CWEU-USERS/CWNL)" <Maarten.Boot AT NL.COMPUWARE DOT COM>
Date: Mon, 19 Jul 2004 12:09:30 +0200
Networkers, Last week I wrote a small perl program to verify my LTO-2 tapes. I needed it after too many LTO tapes were marked full between 20 and 50 GB. On some tapes (not all) I see some interesting
Author: Tim Mooney <mooney AT DOGBERT.CC.NDSU.NODAK DOT EDU>
Date: Mon, 19 Jul 2004 13:31:26 -0500
In regard to: [Networker] Time differences in writing 1Gb, Maarten Boot...: On some tapes (not all) I see some interesting time differences on an otherwise idle machine Hardware used: Sun E450 with 2
Author: Howard Martin <howard.martin AT EDS DOT COM>
Date: Tue, 20 Jul 2004 04:40:12 -0400
Even better use bigasm on the machine with the tape drives, I doubt if many disks can keep up with a LTO-2 particularly if you get reasonable compression. -- Note: To sign off this list, send a "sign
Author: "Maarten Boot (CWEU-USERS/CWNL)" <Maarten.Boot AT NL.COMPUWARE DOT COM>
Date: Tue, 20 Jul 2004 11:11:45 +0200
Tim, I realized that , thats why the program starts with preparing 1 block of data like cat /dev/random | gzip . The program thens reads only 1 block of 128 k into a buffer. Iit thens starts writing
Author: "Maarten Boot (CWEU-USERS/CWNL)" <Maarten.Boot AT NL.COMPUWARE DOT COM>
Date: Tue, 20 Jul 2004 11:12:44 +0200
On good tapes the program gets 30 seconds for 1 GB -- Maarten Boot, Compuware Europe B.V. Hoogoorddreef 5 1101 BA Amsterdam -- Note: To sign off this list, send a "signoff networker" command via emai
Author: Howard Martin <howard.martin AT EDS DOT COM>
Date: Tue, 20 Jul 2004 05:39:31 -0400
I've just realised that the times you gave are "running" times and not a series of times for different saves. I've seen this sort of thing before and assumed that it is due to other activity on the s
We saw the same thing earlier this year with a new STK tape library with IBM FC ULTRIUM2 drives with the same firmware (38D0). This library is connected to both an AIX p630 and HP L2000 servers. I wr
Author: "Maarten Boot (CWEU-USERS/CWNL)" <Maarten.Boot AT NL.COMPUWARE DOT COM>
Date: Wed, 21 Jul 2004 11:12:37 +0200
Thanks Mike , That is very helpfull as is the most accurate description of the phenomenon that we see here. I did find hints to different drivers for HP on the web but no luck so far for Solaris. You