
Monitoring Disk Resources
Disk Monitor Reference
Logical Volume Number of Copies
The logical volume number of copies is most useful to monitor in a mirrored disk configuration. It tells you how many copies of the data are available.
MirrorDisk/UX supports up to
Note that when you configure mirroring in LVM, it lists 0 mirrors to mean you have one copy of the data. Likewise, 2 mirrors mean you have 3 copies of the data (one original plus 2 mirrors). The disk monitor is monitoring all copies of data, and therefore counts the “original” as part of the total number of copies.
Table | Interpreting Logical Volume Copies | ||
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| Resource Name | vg/vgName/lv/copies/lvName |
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| Condition | Interpretation |
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| 0 | No copies, either physical parts of the disk array have problems, |
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| the lv is inactive, or a physical extent is stale or unavailable. |
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| 1 | One complete copy of data available; if the data is not mirrored, |
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| then all physical extents are fine, if data is mirrored, all other |
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| copies have problems. |
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| 2 | Two complete copies of data are available; if the data is |
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| mirrored, then all physical disks are up and data is available, if |
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| physical extent . |
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| 3 | All copies of a |
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When configuring requests from the SAM interface, a wildcard (*) may be used in place of lvName to request status for all logical volumes in a volume group.
If you split off mirrors from your mirrored configuration, you will see the number of copies reduced by 1 when the split mirror is created.
Chapter 2 | 39 |