You can view detailed information about a virtual disk
(VDisk) from the View VDisk Details panel in the SAN Volume Controller Console.
Attributes
The
following attributes are displayed in the table:
- ID
- Displays the system-assigned ID for the VDisk.
- Name
- Displays the name of the VDisk. If you do not set the name, the
system assigns one.
- State
- Displays the current state of the VDisk. The following values
are valid:
- Online
- Indicates that the VDisk is online and available if both nodes
in the I/O group can access the VDisk.
- Offline
- Indicates that the VDisk is offline and unavailable if both nodes
in the I/O group are missing or none of the nodes in the I/O group
that are present can access the VDisk.
- Degraded
- Indicates that the VDisk is degraded if one node in
the I/O group is online and the other node is either missing or cannot
access the VDisk.
- I/O Group ID
- Displays the system-assigned ID for the I/O group.
- I/O Group Name
- Displays the name of the I/O group that the VDisk is a member
of.
- MDisk Group ID
- Displays the system-assigned ID for the MDisk group from which
this VDisk is made.
The value Many indicates
that this VDisk has multiple copies, which can be on different MDisk
groups. Click the link in this field to display the View
VDisk Copy Details panel for more details on the MDisk
groups that contain the VDisk copies.
- MDisk Group Name
- Displays the name of the MDisk group that this VDisk belongs
to.
The value Many indicates that this VDisk
has multiple copies, which can be on different MDisk groups. Click
the link in this field to display the View VDisk Copy Details panel
for more details on the MDisk groups that contain the VDisk copies.
- Capacity
- Displays the size of the VDisk in bytes.
- Type
- Displays the type of VDisk. The following types of VDisks are
possible:
- Striped
- Indicates that the VDisk was created from multiple MDisks that
are in the MDisk group. Extents are allocated on the MDisks in the
specified order.
- Sequential
- Indicates that the VDisk was created from one MDisk that is in
the MDisk group. Extents are sequentially allocated on the MDisk.
- Image
- Indicates that the VDisk was created from one MDisk that is in
the MDisk group. Provides a direct block-for-block translation from
the MDisk to the VDisk. This type of VDisk is intended for MDisks
that already contain data that was not written through the SAN Volume Controller.
- Many
- Indicates that the VDisk has multiple copies, which can have different
types. Click the link to determine the type for each of the copies
of the VDisk.
- Formatted
- Indicates if this VDisk was formatted before use.
- MDisk ID
- Displays the system-assigned ID of the MDisk that provides the
extents for this VDisk. The MDisk ID only applies if the VDisk type
is sequential or image.
The value Many indicates that this VDisk
has multiple copies, which can be on different MDisks. Click the link
in this field to display the View VDisk Copy Details panel
for more details about the MDisk that is used by each of the VDisk
copies.
- MDisk Name
- Displays the name of the MDisk that provides the extents for this
VDisk. The MDisk name only applies if the VDisk type is sequential
or image.
The value Many indicates that this
VDisk has multiple copies, which can be on different MDisks. Click
the link in this field to display the View VDisk Copy Details panel
for more details about the MDisk that is used by each of the VDisk
copies.
- FlashCopy® Map Count
- Displays the number of mappings that the VDisk belongs to.
- Copy Type
- Displays the copy type for this relationship. The following values
are possible:
- Relationship ID
- Displays the system-assigned ID that represents a Metro Mirror
or Global relationship. If this VDisk belongs to a Metro Mirror or
Global Mirror relationship, this field contains the ID of the relationship.
- Relationship Name
- If this VDisk belongs to a Metro Mirror or Global Mirror relationship,
this field contains the name of the relationship.
- I/O Throttling
- The maximum rate at which I/Os are accepted for this VDisk. This
rate can be expressed in I/Os per second or megabytes per second (Mbps).
- Preferred Node for I/O
- The system-assigned ID of the preferred node for I/O to this VDisk.
- Mapped to a Host
- Indicates if the VDisk is mapped to a host.
- Fast Write State
- Indicates if the VDisk has data in the cache. The following fast
write states are possible:
- Empty
- The VDisk does not have outstanding data in the cache.
- Not Empty
- The VDisk has unwritten data in the cache.
- Corrupt
- The VDisk might have had data in the cache, but it is now lost.
- Cache Mode
- Indicates if read and write I/O operations that are performed
by the VDisk are stored in the cache. The following types of cache
modes are possible:
- Read/Write
- All read and write I/O operations that are performed by the VDisk
are stored in the cache.
- None
- All read and write I/O operations that are performed by the VDisk
are not stored in the cache.
- UID
- Displays a 32-byte hexadecimal string that identifies the VDisk.
- Unit Device Identifier
- Displays the unit device identifier as a decimal or hex value.
- Copies
- Displays the number of VDisk copies.
- Synchronization Rate
- Displays the mirror synchronization rate for the VDisk. A value
of zero (0) disables synchronization. The default value is 50 (2 MB
per second).
The following table shows the relationship of the
rate value to the data copied per second.
Table 1. Relationship between the rate value
and the data copied per second| User-specified rate attribute value |
Data copied/sec |
|---|
| 1 - 10 |
128 KB |
| 11 - 20 |
256 KB |
| 21 - 30 |
512 KB |
| 31 - 40 |
1 MB |
| 41 - 50 |
2 MB |
| 51 - 60 |
4 MB |
| 61 - 70 |
8 MB |
| 71 - 80 |
16 MB |
| 81 - 90 |
32 MB |
| 91 - 100 |
64 MB |
- I/O Throttling
- The maximum rate at which I/Os are accepted for this VDisk. This
rate can be expressed in I/Os per second or megabytes per second (MBps).
- Mapped to a Host
- Indicates if the VDisk is mapped to a host.
- Preferred Node for I/O
- The system-assigned ID of the preferred node for I/O to this VDisk.
- Fast Write State
- Indicates if the VDisk has data in the cache. The following fast
write states are possible:
- Empty
- The VDisk does not have outstanding data in the cache.
- Not Empty
- The VDisk has unwritten data in the cache.
- Corrupt
- The VDisk might have had data in the cache, but it is now lost.
- Cache Mode
- Indicates if read and write I/O operations that are performed
by the VDisk are stored in the cache. The following types of cache
modes are possible:
- Read/Write
- All read and write I/O operations that are performed by the VDisk
are stored in the cache.
- None
- All read and write I/O operations that are performed by the VDisk
are not stored in the cache.
Actions
The
following action is available:
- Close
- Click this button to exit this panel.