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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 |
1613.0. "Open: volume shadowing problem" by STAR::JKEENAN () Tue Feb 18 1997 10:57
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Date: Tue, 18 Feb 1997 04:40:11 -0500
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From: "VMS001::WWW"@vms001.das-x.dec.com (18-Feb-1997 0440)
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Subject: Ask the Wizard: '[email protected]'
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Name: Cheah Wai Kit
Email Address: [email protected]
CPU Architecture: VAX
Version: v 5.5-2
Questions:
I have a VAX 4600 with three pair of volume shadowed DSSI disks. They are split over two I/O buses.
The problem is that these volume shadow sets are being dismounted once every two or three weeks.
Analysis from DEC Health Check monitoring utility shows nothing other than that the I/O rate was higher
than recommended. But, we have been puzzled because if the I/O was high enough to choke the disks
and dismounts them, why does it happen so periodically (once every 2 or 3 weeks) ? And it is very strange
that it happens only at about 11.30pm at night. Volume Shadowing was supposed to provide an added
security in terms of redundancy and data protection.
Has DEC ever encountered at other sites where Volume Shadowing is showing similar behaviour ?
| T.R | Title | User | Personal
Name | Date | Lines |
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| 1613.1 | Check For Patches and Newer Firmware, Contact Support | XDELTA::HOFFMAN | Steve, OpenVMS Engineering | Tue Feb 18 1997 16:14 | 6 |
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Please check for available shadowing patches at DIGITAL's web site.
If no shadowing patches appear applicable, please contact your
software support organization for further assistance. And please
ask your hardware support organization to check the firmware revisions
of the disks involved.
|