Quick Format specifications

Provisioning Guide for Mainframe Systems for VSP One Block 85
Version
10.5.x
File Size
1619 KB
Audience
anonymous
Part Number
MK-26VSP1B034-03
ft:lastEdition
2026-06-23
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
  • You can perform Quick Format on multiple parity groups at the same time. The number of parity groups in which Quick Format can be performed at the same time is determined by the total number of entries in the parity groups. The number of entries is an indicator used to manage the number of parity groups that can undergo Quick Format at the same time. The number of entries in a parity group is determined by the capacity of the drives that make up each parity group. The following table shows entries in a parity group:
    Emulation type Capacity of drives that make up a parity group Entry in one parity group
    OPEN-V 48 TB or less 1 entry
    Greater than 48 TB 2 entries
    3390-xx 45 TB or less 1 entry
    Greater than 45 TB 2 entries
  • There is no limit to the number of volumes on which Quick Format can be performed, as long as there are 72 entries or less.
Concurrent Quick Format operations While one Quick Format operation is in progress, another Quick Format operation can be performed. Even in this case, the total number of entries in the parity group currently undergoing Quick Format and the parity group undergoing additional Quick Format must not exceed 72 entries.
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.
Blocking and restoring of volumes If a volume undergoing Quick Format is blocked, the storage system recognizes that the volume is undergoing Quick Format. After the volume is restored, the status of the volume changes to Normal (Quick Format).

The parity groups in which all volumes undergoing Quick Format are blocked are also included in the number of entries in parity groups currently undergoing Quick Format. To calculate the number of parity groups that have not undergone but can undergo Quick Format, use the following formula:

72 - X - Y

where:

X = number of entries in parity groups on which Quick Format is being performed.

Y = number of entries in parity groups for which all volumes are blocked during the Quick Format.

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 an LDEV in the parity group with accelerated compression enabled, external volumes, virtual volumes, or journal volumes of Universal Replicator for Mainframe.
  • The Volume Migration feature or the QuickRestore feature cannot be applied to volumes undergoing Quick Format.
SIM output after completion of Quick Format operation When a Quick Format operation is performed, the SIM code 0x410100 is output after completion of the formatting. If multiple Quick Format operations are performed, the SIM code 0x410100 is output after completion of all format operations.
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