You can create Thin Image (HTI) pairs using volumes on which you set Data Retention Utility access attributes. In addition, you can set any access attribute for virtual volumes of HTI.
Depending on access attributes of the P-VOL, S-VOL, or pool volume, you cannot perform some pair tasks and pool tasks with Thin Image. The Thin Image pair tasks you can perform are different depending on whether you assign Data Retention Utility access attributes using CCI or HDvM - SN. The tables below explain whether you can perform Thin Image pair tasks and pool tasks on volumes that have access attributes assigned by Data Retention Utility. If you release assignment of snapshot data after assigning access attributes to a Thin Image S-VOL, the Thin Image tasks you can perform are the same as those that can be performed when the Read/Write attribute is assigned to the S-VOL.
Also, you can assign access attributes to Thin Image P-VOL and S-VOLs. The tables below also explain Thin Image pair tasks and pool tasks after access attributes are assigned.
Access attributes and supported Thin Image pair tasks
The following table lists the relationship between P-VOL and S-VOL access attributes and Thin Image pair tasks when using HDvM - SN to assign Data Retention Utility access attributes.
Volume access attributes specified for the HTI pair |
HTI pair task |
|||
---|---|---|---|---|
P-VOL |
S-VOL |
Create, split, suspend, Resync pair (Normal Copy) |
Resync (Reverse Copy)1 |
Delete |
Read/Write |
Read/Write |
Yes |
||
Read Only, Protect, S-VOL Disable |
No |
|||
Read Only, Protect, S-VOL Disable |
Read/Write |
Yes |
No |
Yes |
Read Only, Protect, S-VOL Disable |
No |
|||
|
The following table lists the relationship between P-VOL and S-VOL access attributes and Thin Image pair tasks when using CCI to assign Data Retention Utility access attributes.
Volume access attributes specified for the HTI pair |
HTI pair task |
|||
---|---|---|---|---|
P-VOL |
S-VOL |
Create, split, suspend, Resync pair (Normal Copy) |
Resync (Reverse Copy)1 |
Delete |
Read/Write, Read Only, Protect |
Read/Write, Read Only, Protect |
Yes |
||
S-VOL Disable |
No |
|||
S-VOL Disable |
Read/Write, Read Only, Protect |
Yes |
No |
Yes |
S-VOL Disable |
No |
|||
|
Access attributes and supported Thin Image pool tasks
The following table lists the relationship between P-VOL and S-VOL access attributes specified by Thin Image and Thin Image pool tasks when using CCI or HDvM - SN to assign Data Retention Utility access attributes.
Volume access attributes specified by HTI |
Pool-VOL setting | ||||||||
---|---|---|---|---|---|---|---|---|---|
Read/Write |
Yes |
||||||||
Read Only |
No |
||||||||
Protect |
No |
||||||||
S-VOL Disable |
No |
Required Thin Image pair status when using Data Retention Utility to assign access attributes to some volumes
The following table shows the Thin Image pair status that is required to use Data Retention Utility to assign access attributes to some Thin Image P-VOLs and S-VOLs when also using HDvM - SN to assign Data Retention Utility access attributes.
HTI volume |
Access attribute to be assigned |
||||||||
---|---|---|---|---|---|---|---|---|---|
Pair status |
Volume |
Read/Write |
Read Only Protect S-VOL Disable |
||||||
COPY |
P-VOL |
Yes |
Yes |
||||||
S-VOL |
Yes |
No |
|||||||
PAIR, PFUL |
P-VOL |
Yes |
Yes |
||||||
S-VOL |
Yes |
Yes |
|||||||
PSUS, PFUS |
P-VOL |
Yes |
Yes |
||||||
S-VOL |
Yes |
Yes |
|||||||
SMPL(PD) |
P-VOL |
Yes |
Yes |
||||||
S-VOL |
Yes |
No |
|||||||
RCPY |
P-VOL |
Yes |
No |
||||||
S-VOL |
Yes |
No |
|||||||
PSUE |
P-VOL |
Yes |
Yes |
||||||
S-VOL |
Yes |
No |
The following table shows the Thin Image pair status that is required to use Data Retention Utility to assign access attributes to some Thin Image P-VOLs and S-VOLs when also using CCI to assign Data Retention Utility access attributes.
HTI volume |
Access attribute to be assigned |
||||||||
---|---|---|---|---|---|---|---|---|---|
Pair status |
Volume |
Read/Write Read Only Protect |
S-VOL Disable |
||||||
COPY |
P-VOL |
Yes |
Yes |
||||||
S-VOL |
Yes |
No |
|||||||
PAIR, PFUL |
P-VOL |
Yes |
Yes |
||||||
S-VOL |
Yes |
Yes |
|||||||
PSUS, PFUS |
P-VOL |
Yes |
Yes |
||||||
S-VOL |
Yes |
Yes |
|||||||
SMPL(PD) |
P-VOL |
Yes |
Yes |
||||||
S-VOL |
Yes |
No |
|||||||
RCPY |
P-VOL |
Yes |
No |
||||||
S-VOL |
Yes |
No |
|||||||
PSUE |
P-VOL |
Yes |
Yes |
||||||
S-VOL |
Yes |
No |