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Displaying Volume Status
Volumes are recognized by the system in the states listed in Table 3-1
. The "Accessible?" column in Table 3-1 shows whether a volume
can be used in the corresponding state.
Table 3-1. Volume States
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| | | |
| State | Description | Accessible? |
| | | |
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| | | |
| MASTER | A volume in this state is the master | Yes |
| | volume of a volume set. In order | |
| | for the system to recognize the | |
| | volume set, the master volume must | |
| | be mounted. | |
| | | |
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| | | |
| MEMBER | A volume in this state belongs to a | Yes |
| | volume set whose master is mounted. | |
| | If the master were not mounted, the | |
| | volume would be in the LONER state. | |
| | | |
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| | | |
| LONER | A volume is in the LONER state when | No |
| | its master is not mounted or when | |
| | the volume set is taken offline by | |
| | the VSCLOSE command. | |
| | | |
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| | | |
| SCRATCH | A volume in the SCRATCH state can be | No |
| | initialized. It may contain data, | |
| | but by scratching the volume, the | |
| | user has indicated that the data is | |
| | no longer needed. | |
| | | |
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| | | |
| UNKNOWN | A volume in the UNKNOWN state does | No |
| | not have a label that the system can | |
| | recognize. The volume may be from | |
| | another system, it may be a new disk | |
| | pack, or it may be a volume that has | |
| | been formatted. An UNKNOWN volume | |
| | is available for initialization. | |
| | | |
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There are two commands that display the state of a volume: the system
command, DSTAT, and the VOLUTIL command, SHOWSET.
Use the system command, DSTAT, to display the status of nonsystem disks
on the system. DSTAT ALL displays the status of all of the disks on the
system, including the system disks.
NOTE It is a good idea to frequently display disk information to verify
disk status when using VOLUTIL commands.
Example: Displaying Volume Status
This example shows how to display the status of all of the disks
recognized by the system by using the DSTAT command.
At the system prompt, use the DSTAT ALL command.
[REV BEG]
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| |
| |
| : DSTAT ALL |
| |
| LDEV-TYPE STATUS VOLUME (VOLUME SET - GEN) |
| _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ |
| 1-079350 MASTER MEMBER1 (MPEXL_SYSTEM_VOLUME_SET-0) |
| 2-079350 MEMBER MEMBER2 (MPEXL_SYSTEM_VOLUME_SET-0) |
| 10-07937 UNKNOWN |
| 11-07937 LONER |
| 12-07937 SCRATCH |
| |
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[REV END]
The above example shows that there are two system volumes (LDEVs 1 and
2), and three volumes (LDEVS 10,11,and 12) available for initializing:
one SCRATCH, one LONER, and one UNKNOWN volume.
This example shows how to use the SHOWSET command to display disk status.
1. Invoke VOLUTIL.
2. At the VOLUTIL prompt, use the SHOWSET command.
[REV BEG]
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| |
| |
| : VOLUTIL |
| |
| volutil:SHOWSET PROD_SET:VOLUMES |
| |
| Volume Name Vol Status Ldev |
| - - - - - - - - - - - - - - - - - |
| MEMBER1 UNKNOWN 10 |
| MEMBER2 LONER 11 |
| MEMBER3 SCRATCH 12 |
| |
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[REV END]
The DSTAT and SHOWSET commands are described in detail in chapter 5.