Quick Format specifications

Item

Description

Preparation for executing the Quick Format feature

The internal volume must be in blocked status.

Maximum number of parity groups that can undergo Quick Format

Quick Format can be performed for one or more parity groups at the same time. The number of parity groups on which Quick Format can be performed concurrently depends on the total number of entries for the parity groups. The number of entries for a parity group is based on the capacity of the drives in the parity group as follows:

  • One parity group consisting of drives whose capacity is 32 TB or less: 1 entry
  • One parity group consisting of drives whose capacity is greater than 32 TB: 2 entries

The maximum number of Quick Format operations that can be performed at the same time depends on the storage system model as follows:

  • VSP G130: 18 entries
  • VSP G350, VSP F350: 18 entries
  • VSP G370, VSP F370: 18 entries
  • VSP G700, VSP F700: 36 entries
  • VSP G900, VSP F900: 72 entries

There is no limit on the number of volumes that can undergo Quick Format concurrently.

Concurrent Quick Format operations

While one Quick Format operation is in progress, another Quick Format operation can be performed. The maximum number of concurrent Quick Format operations is determined by the number of entries for the model as specified above.

Preliminary processing

At the beginning of the Quick Format operation, preliminary processing is performed to generate management information. If a volume is undergoing preliminary processing, the status of the volume is Preparing Quick Format. While preliminary processing is in progress, hosts cannot perform I/O access to the volume.

Storage system is powered off and back on

The Quick Format operation resumes when power is turned back on.

Restrictions

  • Quick Format cannot be executed on LDEV in the parity group with Accelerated Compression enabled, external volumes, virtual volumes, or journal volumes of Universal Replicator.
  • The volume migration feature or the QuickRestore feature cannot be applied to volumes undergoing Quick Format. When you use Command Control Interface to execute the volume migration operation or the QuickRestore operation on volumes undergoing Quick Format, EX_CMDRJE will be reported to Command Control Interface. In this case, check the volume status.
  • Quick format cannot be performed on a deduplication system data volume.

SIM which is output when finishing of the quick format

If a quick format is performed, SIM=0x410100 is output when the format processing is finished. If multiple quick formats are performed, SIM=0x410100 is output when all format processing is finished.

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