ISO/IEC 24775-4:2021

INTERNATIONAL ISO/IEC
STANDARD 24775-4
Second edition
2021-03
Information technology — Storage
management —
Part 4:
Block devices
Reference number
©
ISO/IEC 2021
© ISO/IEC 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO/IEC 2021 – All rights reserved

Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical activity.
ISO and IEC technical committees collaborate in fields of mutual interest. Other international
organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the
work.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of document should be noted (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. Details
of any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents) or the IEC list of patent
declarations received (see http://patents.iec.ch).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT),
see www.iso.org/iso/foreword.html.
This document was prepared by SNIA (as Storage Management Technical Specification, Part 4 Block
Devices, Version 1.8.0, Revision 5) and drafted in accordance with its editorial rules. It was adopted,
under the JTC 1 PAS procedure, by Joint Technical Committee ISO/IEC JTC 1, Information technology.
This second edition cancels and replaces the first edition (ISO/IEC 24775-4:2014), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— USAGE text was revised to address code (now included in the front matter for all SNIA specifications)
— All recipes and their references were deleted.
— Instances of subprofile were changed to profile. In the annex, instances of subprofile were changed
to component profile (TSG meeting voice vote).
— Profile versions and related text were updated. (TSG meeting voice vote).
— Indications have been replaced by DMTF Indications, and all affected clauses updated. (TSG meeting
voice vote).
— Instances of Experimental within profiles already labeled as Experimental were removed to avoid
confusion and redundancy. (Editorial change)
— CIM/XML was changed to CIM-XML (Response to ballot comments).
© ISO/IEC 2021– All rights reserved iii

— Annex: SMI-S Information Model.
— The CIM schema version was changed to 2.51 for V1.8.0 Rev3.
— TSG-SMIS-SCR00315.001
— Promoted the maturity level from DRAFT to EXPERIMENTAL for these revisions that update
profiles to remove SNIA_ classes and use DMTF CIM_ classes in these profiles: Array, Block
Services Package, Block Storage Views, CKD Block Services, Disk Drive Lite, Sparing, Erasure,
Extent Composition, Masking and Mapping, Storage Server Asymmetry, Storage Virtualizer,
Storage Element Protection, Replication Services, Pools from Volumes, Group Masking and
Mapping, Storage Relocation, Thin Provisioning. Registry of Storage Extent Discriminators.
— TSG-SMIS-SCR00316.001
— Promoted the changes from Draft to Experimental in SMI-S 1.7.0 for these revisions: Add
additional alerts for CIM/ block and file classes in these profiles: Array, Block Services Package,
Replication Services.
— XML was changed to CIM-XML (Response to ballot comments)
— Array Profile (SMIS-170-Draft-SCR00004)
— Added additional Mandatory Indication Filters to track modification of OperationalStatus and
ElementName for the top-level CS.
— Fixes required for SCR00316 to resolve duplicate use of standard messagesArray Profile.
— Fixed versions numbers in the Related Profiles table to match the version identified for the
related profiles.
— Fixed the version reference in the CIM Elements table for CIM_ComputerSystem (Top Level
System) to match the version defined by the Array Profile.
— Changed the Requirement for CIM_SystemDevice (System to SCSIProtocolController) to
Conditional (from Mandatory), since the SCSIProtocolController is Conditional.
— Made the Requirement for OtherIdentifyingInfo and IdentifyingDescriptions in
CIM_ComputerSystem (Top Level System) Mandatory to maintain backward compatibility with
1.6.1.
— Automated Storage Tiering Profile
— Fixed versions numbers in the Related Profiles table to match the version identified for the
related profiles.
— Changed “DeleteOnEmptyElement” to “DeleteOnEmptyStorageTier” in CIM_StorageTier and
CIM_TierSettingData to match the mof.
— Automated Storage Tiering Policy Profile
— Propagated the Automated Storage Tiering changes to the Automated Storage Tiering Policy
Profile.
— Fixed versions numbers in the Related Profiles table to match the version identified for the
related profiles.
— Block Server Performance Profile (SMIS-170-Draft-SCR00001.001):
iv © ISO/IEC 2021– All rights reserved

— Added support for Advanced Metrics.
— Updated and promoted the SNIA classes to CIM Classes.
— Made a minor adjustment to discovery of Rated Data.
— Marked the rated data properties experimental.
— Cleaned up references to Volume Management, which has been deprecated.
— In Summary of Statistics Support by Element table, revised legend for ReadIOTimeCounter and
WriteIOTimeCounter for Top Level Computer System to be Optional (comments to SCR#
SMIS-170-Draft-SCR00001).
— Promoted Draft material to Experimental (SMIS-170-EXPERIMENTAL-SCR00001).
— Corrected QueryStatisticalCollection to QueryStatisticsCollection.
— Fixed versions numbers in the Related Profiles table to match the version identified for the
related profiles.
— Promoted “Advanced Metrics” from Draft to Experimental.
— Added the GetRateStatisticsCollection() method to the CIM Elements table for
CIM_BlockStatisticsService as defined in the text of the profile.
— Block Services Package
— Added a new condition for keeping OperationalStatus on storage pools (SMIS-170-Draft-
SCR00003).
— Added additional Mandatory Indication Filters for Storage Pools, Storage Volumes and Logical
Disks to track size and name changes (SMIS-170-Draft-SCR00004).
— Added Alert indications from TP (SMIS-170-Draft-SCR00004).
— Removed Experimental qualifier and dependency on Experimental Indications (SMIS-170-
Draft- SCR00004).
— AlertIndication DRM30 was marked as Mandatory (SMIS-170-Draft-SCR00004).
— Removed RECIPE entry for unused recipe SMI_BlockServices_ExpandStorageElement
(SMIS-150- Errata-SCR00061).
— Promoted to experimental a new condition for keeping OperationalStatus on storage pools
and updated the health section to reflect new OperationalStatus encodings (SMIS-170-Draft-
SCR00003).
— Promoted several sections to Stable (DRM-SMIS-SCR00254).
— Added footnote to Table 15.
— Fixed versions numbers in the Related Profiles table to match the version identified for the
related profiles.
— Added Storage Pool Diagnostics in the Related Profiles table.
— Changed the property AvailableFormFactor to AvailableFormFactorType in
CIM_StorageCapabilities to match the mof.
— Deleted the AvailablePortType property from CIM_StorageCapabilities since it is not in the
mof (it was replaced by AvailableInterconnectType).
— Added SupportedCompressionElements property to CIM_StorageCapabilities (completes
TEMP00001.001).
— Changed the property FormFactor to FormFactorType in CIM_StorageSetting to match the mof.
© ISO/IEC 2021– All rights reserved v

— In CIM_StorageConfigurationCapabilities (Concrete) the enumeration values were extended for
SupportedSynchronousActions. SupportedAsynchronousActions and
SupportedStorageElementFeatures to match the text of the profile (and the mof).
— In CIM_StorageConfigurationCapabilities (Global and Primordial) the enumeration values were
extended for SupportedStorageElementFeatures to match the text of the profile (and the mof).
— Added the CreateOrModifyAnyElementFromStoragePool() method to
CIM_StorageConfigurationService to match the text of the profile.
— Added CompressionActive, CompressionPercent, CompressionRate, CompressionState,
DedupActive and DedupPercent to the CIM Element tables for CIM_StoragePool (all variations).
— Promoted DedupActive and DedupPercent from Draft to Experimental in CIM_StoragePool (all
variations).
— Changed the Central Class from StorageConfigurationService to CIM_StoragePool (Primordial)
(TSGSMIS-SCR00333).
— Changed the property EncryptionSupported to Encryption in CIM_StorageCapabilities (SMIS-
180-Errata-SCR00001).
— Removed the property SupportedCompressionElements from CIM_StorageCapabilities
(SMIS-180-Errata-SCR00001).
— Block Services Resource Ownership Profile
— Added reference to SMI-S Version 1.4 Revision 6.
— Block Services with Thin Provisioning (SMIS-170-Draft-SCR00004)
— Added mandatory indications
— Block Storage Views Profile
— Fixed versions numbers in the Related Profiles table to match the version identified for the
related profiles.
— Changed the Related Profile reference to Copy Services to be Replication Services, since Copy
Services was deprecated in favor of Replication Services.
— Deleted an extra DDLocationIndicator entry from the CIM_DiskDriveView CIM Elements table.
— CKD Block Services Profile
— Fixed versions numbers in the Related Profiles table to match the version identified for the
related profiles.
— Propagated the Block Services Package changes to the CKD Block Services Profile.
— Changed the Central Class from StoragePool to CIM_StoragePool (Primordial) (TSG-SMIS-
SCR00333).
— Changed the property EncryptionSupported to Encryption in CIM_StorageCapabilities
(SMIS-180-Errata-SCR00001).
— Removed the property SupportedCompressionElements from CIM_StorageCapabilities
(SMIS-180-Errata-SCR00001).
— Copy Services Profile
— Marked as Deperecated (DRM-SMIS-SCR-00253.001).
vi © ISO/IEC 2021– All rights reserved

— Disk Drive Profile
— Removed this obsolete and already deprecated clause (DRM-SMIS-SCR00254).
— Disk Drive Lite (SMIS-170-Draft-SCR00004)
— Added additional Mandatory Indication Filter to track modification of OperationalStatus.
— Disk Drive Lite Profile
— Changed the references to “Disk Drive Light” to “Disk Drive Lite” in the Synopsis.
— Added DiskType, FormFactor and Encryption properties to the CIM_DiskDrive CIM Elements
table to match the text of the profile.
— Disk Sparing Profile
— Removed the Draft “ExtentDiscriminator” property from CIM_LogicalDisk, CIM_StorageVolume
and
CIM_StorageExtent.
— Changed the Central Class from ComputerSystem to CIM_StorageRedundancySet (TSG-
SMISSCR00333).
— Erasure Profile
— Added conditional requirements for the conditions for implementing CIM_LogicalDisk and
CIM_StorageVolume.
— Changed ErasureSetting to StorageErasureSetting, ErasureService to StorageErasureService
ErasureCapabilities to StorageErasureCapabilities.
— Extent Composition Profile
— Changed the version of the profile to be 1.7.0 due to indication classes removed in 1.7.0.
—. Added footnotes to Table 292.
— Extent Mapping Profile
— Removed this obsolete and already deprecated clause (DRM-SMIS-SCR00254)
— Group Masking and Mapping Profile
— Propagated the Masking and Mapping changes to the Group Masking and Mapping Profile.
— Added MoveMembers and CreateOrModifyMaskingGroup to the CIM Element table for
CIM_GroupMaskingMappingService.
— Removed the property GetMaskingGroupOperationOrder and the method
GetSupportedGroupMaximums from the CIM Elements table for
CIM_GroupMaskingMappingCapabilities, since they are not in the mof and not referenced
anywhere in the profile text.
— Made Alert Indication mandatory (SMIS-170-Draft-SCR00004).
— Promoted to Stable (DRM-SMIS-SCR00254.000).
— LUN Creation Profile
— Removed this obsolete and already deprecated clause (DRM-SMIS-SCR00254).
— LUN Mapping and Masking Profile
© ISO/IEC 2021– All rights reserved vii

— Removed this obsolete and already deprecated clause (DRM-SMIS-SCR00254).
— Masking and Mapping Profile
— Added CIM_SystemDevice between the ProtocolController and its scoping system.
— Added SupportedAsynchronousActions and SupportedSynchronousActions to the CIM
Elements table for CIM_ProtocolControllerMaskingCapabilities.
— Changed the version of the profile to be 1.8.0 due the aforementioned changes.
— Added additional Mandatory Indication Filter to track modification of masking objects
StorageHardwareID, SAPAvailableForElement (SMIS-170-Draft-SCR00004).
— Added alert if the Masking View changes(SMIS-170-Draft-SCR00004).
— Added element and element desciprtion: 14.6.1 CIM_AssociatedPrivilege (TSG meeting voice
vote).
— Pools from Volumes Profile
— Fixed versions numbers in the Related Profiles table to match the version identified for the
related profiles.
— Pool Manipulation Capabilities, and Settings Profile
— Removed thi
...