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тАО06-11-2002 01:11 PM
тАО06-11-2002 01:11 PM
HP Surestore 2/20 With an Ultrium 1 Drive and Netbackup 3.4.1
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тАО06-11-2002 01:33 PM
тАО06-11-2002 01:33 PM
Re: HP Surestore 2/20 With an Ultrium 1 Drive and Netbackup 3.4.1
HTH
Duncan
I am an HPE Employee
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тАО06-11-2002 02:10 PM
тАО06-11-2002 02:10 PM
Re: HP Surestore 2/20 With an Ultrium 1 Drive and Netbackup 3.4.1
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тАО06-11-2002 08:51 PM
тАО06-11-2002 08:51 PM
Re: HP Surestore 2/20 With an Ultrium 1 Drive and Netbackup 3.4.1
May I suggest the following ?
- Run the Performance assessment tool on your windows 2000 host which will test you filesystem capabillities and returns a MB/sec value for the maximum that your system is capable of delivering. The Performance Asessment Tool is available here: ftp://ftp.hp.com/pub/information_storage/software/pat12.exe
- Go into the BIOS (ctrl-A) setup for the 39160 SCSI HBA's and set the transfer rates for the Ultrium tape devices to a fixed 80 MB/sec.
I have seen instances where the SCSI HBA negotiated the speed between HBA and tape device all the way down to 0MB/sec leading to terribly slow backups.
Hope this helps,
-Eric
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тАО06-12-2002 04:23 AM
тАО06-12-2002 04:23 AM
Re: HP Surestore 2/20 With an Ultrium 1 Drive and Netbackup 3.4.1
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тАО06-12-2002 02:14 PM
тАО06-12-2002 02:14 PM
Re: HP Surestore 2/20 With an Ultrium 1 Drive and Netbackup 3.4.1
http://www.hp.com/products1/storage/compatibility/hardware/ultrium-dell/index.html
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тАО06-13-2002 12:17 AM
тАО06-13-2002 12:17 AM
Re: HP Surestore 2/20 With an Ultrium 1 Drive and Netbackup 3.4.1
I have done some performance tests with LTO drives on W2000/NT and HP-UX. In general it was hard to reach the same performance with W2000/NT as with HP-UX. With HP-UX I could easy reach 30 MB/s (compressed) and with NT/W2000 about 15-20MB/s. The servers, data and disk system was about equal.
Some ideas.
- What type of data (small files, big files,databases etc). It is hard to reach good performance with small files).
- Check the CPU load during backup. High load can indicate a server bottleneck, low load there is probably a file system bottleneck (disk performance, fragmentation, great number of small files etc.).