General Discussion

Hi

I'm creating a DP-VOL using the RestAPI (PF-Rest , built-in to the array)

REQUEST:

POST base-URL/v1/objects/ldevs

REQUEST-BODY:

{
 "ldevId": 1024,
 "poolId": 0,
 "byteFormatCapacity": "1T",
 "dataReductionMode": "disabled"
}

After creating the DP-VOL, which statement is actually
true (based on fact ... not based on intuitive feeling, opinion or guess):

Statement A:

After creating a new DP-VOL with the RestAPI,
there is zero reason to format the new DP-vol.
Just, go ahead and present the DP-Vol to host-groups
and use it.

Staement B:

After creating a new DP-VOL with the RestAPI,
you should format the new DP-vol before using it.

My guess ( could be wrong ... that's why I'm asking):

I think that Statement A is true. My understanding is:
Formatting a BASIC-LDEV ( aka POOL-VOL ) is essential since
some media error detection is performed.
Based on experience (... using SVP StoNav GUI ), this formatting
occurs automatically when a DP-POOL is created from BASIC-LDEVs/POOL-VOLs.

HOWEVER, formatting a DP-VOL performs no media checking, it
simply returns a DP-VOL's used capacity to the DP-POOL,
thus it would make no sense to format a NEW DP-VOL since
it has no used capacity. 

The reason I'm asking: In the E590 RestAPI manual, the section on
formatting volumes appears immediately after the section on creating
volumes. The manual does not contain any guidance on the question
of formatting or not-formatting new DP-VOLs

Thanks

Andy

Not having ever used REST to configure storage, my general modus-operandi is to create PG's; carve LDEVs (format them) and then place them (whilst undergoing or waiting format) into the HDP pool as pool vol's.

Hi

I'm creating a DP-VOL using the RestAPI (PF-Rest , built-in to the array)

REQUEST:

POST base-URL/v1/objects/ldevs

REQUEST-BODY:

{
 "ldevId": 1024,
 "poolId": 0,
 "byteFormatCapacity": "1T",
 "dataReductionMode": "disabled"
}

After creating the DP-VOL, which statement is actually
true (based on fact ... not based on intuitive feeling, opinion or guess):

Statement A:

After creating a new DP-VOL with the RestAPI,
there is zero reason to format the new DP-vol.
Just, go ahead and present the DP-Vol to host-groups
and use it.

Staement B:

After creating a new DP-VOL with the RestAPI,
you should format the new DP-vol before using it.

My guess ( could be wrong ... that's why I'm asking):

I think that Statement A is true. My understanding is:
Formatting a BASIC-LDEV ( aka POOL-VOL ) is essential since
some media error detection is performed.
Based on experience (... using SVP StoNav GUI ), this formatting
occurs automatically when a DP-POOL is created from BASIC-LDEVs/POOL-VOLs.

HOWEVER, formatting a DP-VOL performs no media checking, it
simply returns a DP-VOL's used capacity to the DP-POOL,
thus it would make no sense to format a NEW DP-VOL since
it has no used capacity. 

The reason I'm asking: In the E590 RestAPI manual, the section on
formatting volumes appears immediately after the section on creating
volumes. The manual does not contain any guidance on the question
of formatting or not-formatting new DP-VOLs

Thanks

Andy

------------------------------
Andrew Romero
Storage Administrator
------------------------------

Hi

I'm creating a DP-VOL using the RestAPI (PF-Rest , built-in to the array)

REQUEST:

POST base-URL/v1/objects/ldevs

REQUEST-BODY:

{
 "ldevId": 1024,
 "poolId": 0,
 "byteFormatCapacity": "1T",
 "dataReductionMode": "disabled"
}

After creating the DP-VOL, which statement is actually
true (based on fact ... not based on intuitive feeling, opinion or guess):

Statement A:

After creating a new DP-VOL with the RestAPI,
there is zero reason to format the new DP-vol.
Just, go ahead and present the DP-Vol to host-groups
and use it.

Staement B:

After creating a new DP-VOL with the RestAPI,
you should format the new DP-vol before using it.

My guess ( could be wrong ... that's why I'm asking):

I think that Statement A is true. My understanding is:
Formatting a BASIC-LDEV ( aka POOL-VOL ) is essential since
some media error detection is performed.
Based on experience (... using SVP StoNav GUI ), this formatting
occurs automatically when a DP-POOL is created from BASIC-LDEVs/POOL-VOLs.

HOWEVER, formatting a DP-VOL performs no media checking, it
simply returns a DP-VOL's used capacity to the DP-POOL,
thus it would make no sense to format a NEW DP-VOL since
it has no used capacity. 

The reason I'm asking: In the E590 RestAPI manual, the section on
formatting volumes appears immediately after the section on creating
volumes. The manual does not contain any guidance on the question
of formatting or not-formatting new DP-VOLs

Thanks

Andy

------------------------------
Andrew Romero
Storage Administrator
------------------------------