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| Title: | "ASK THE WIZARDS" |
|
| Moderator: | QUARK::LIONEL |
|
| Created: | Mon Oct 30 1995 |
| Last Modified: | Mon May 12 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 1857 |
| Total number of notes: | 3728 |
1593.0. "Open: how to speed up backups?" by DIMOND::JKEENAN () Tue Feb 11 1997 22:06
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Date: Mon, 3 Feb 1997 14:23:44 -0500
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From: "VMS001::WWW"@vms001.das-x.dec.com (03-Feb-1997 1423)
To: sander@eng.pko.dec.com, dube@zk3.dec.com, wizard@vmsmkt.zko.dec.com
Subject: Ask the Wizard: 'tecnasa5@panama.c-com.net'
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Questions:
i recently purchased a TZ87 tape drive, with the ability to backup up to 20 GB in 1 hour.
However, using the OpenVMS backup command, my backups are very slow: about 1 hour per each 2 GB.
Is there a way to enhance this? I defragmented the disks, already.
How can i get the 20 GB backed up in an hour aprox?
| T.R | Title | User | Personal
Name | Date | Lines |
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| 1593.1 | Find The Limit... | XDELTA::HOFFMAN | Steve, OpenVMS Engineering | Wed Feb 12 1997 11:58 | 13 |
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Check the throughput on the SCSI bus in use, on the host system,
and on the disk in use. It is quite possible that one or more of
these are limiting the ability to write data to the tape.
Check the documentation for information on suggested quotas for
the BACKUP username, and make sure the host does not become
starved for paged and non-paged pool.
Also check the particular qualifiers used on BACKUP. If this is
a system disk, consider using /NOALIAS. Also consider increasing
the data transfer size values.
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