IBM V7000 SAN Limitations Know and become an Expert

IBM V7000 SAN Limitations Know and Become an Expert. While configuring an SAN we should know about device model limitations because if your dong behind the Limitations it will not work.

IBM V7000 SAN Limitations Know and become an Expert

Property Max. No’s Remarks

System (Cluster) Properties

Control Enclosures per system (Cluster) 4 Each Control enclosure contain 2 node canisters
Nodes per system 8 Arranged as four I/O groups
Nodes per Fabric 64 Maximum number of SVC and V7000 nodes that can be present on the same Fibre Channel fabric, with visibility of each other
Fabrics per system 6 The number of counterpart Fibre Channel SANs which are supported

–          Up to 4 fabrics using native Fibre Channel Ports

–          Up to 2 fabrics using FCoE ports

Inter-cluster Partnerships per system 3 A system may partnered with up to three remote systems. No more than four systems may be in the same connected set.

Node Properties

Logins per node Fibre Channel Ports 512 Includes logins from server HBAs, disk controller ports, and node ports within the same system and node ports from remote systems.
iSCSI sessions per node 256 512 in IP failover mode (when partner node is unavailable)

Managed Disk Properties

Managed disks (MDisks) per system 4096 The maximum number of logical units which can be managed by a system, including internal arrays.

This number also includes external MDisks which have not been configured into storage pools (managed disk groups)

Managed disks per storage pool (Managed disk group) 128
Storage Pools per system 128
Managed disk extent size 8192 MB
Capacity for an individual internal managed disk (array) 1 PB No limit is imposed beyond the maximum number of drives per array limits.

Maximum size is dependent on the extent size of the Storage Pool.

 

Capacity for an individual external managed disk 1 PB External managed disks larger than 2 TB are only supported for certain types of storage systems. Maximum size is dependent on the extent size of the storage pool.
Total Storage Capacity manageable per system 32 PB Maximum requires an extent size of 8192 MB to be used

The limit represents the per system maximum of 2^22 extents

Volume (Virtual Disk) Properties

Volumes (VDisks) per system 8192 Maximum requires a system containing four control enclosures; refer to the volumes per I/O group limit below
Volumes per I/O group (volumes per caching I/O group) 2048
Volumes accessible per I/O group 8192
Thin-provisioned (space-efficient) volume copies per system 8192 No limit is imposed here beyond the volume copies per system limit
Compressed volume copies per system 800 Maximum requires a system containing four control enclosures; refer to the compressed volume copies per I/O group limit below
Compressed volume copies per I/O group 200
Volumes per storage No limit is imposed beyond the volumes per system limit
Fully-allocated volume capacity 256 TB Maximum size for an individual fully-allocated volume

Maximum size is dependent on the extent size of the storage pool.

Thin-Provisioned (space-efficient) volume capacity 256 TB Maximum size for an individual thin-provisioned volume.

Maximum size is dependent on the extent size of the storage pool

Host mappings per system 20,000

Mirrored Volume (Virtual Disk) Properties

Copies per volume 2
Volume copies per system 8192
Total mirrored volume capacity per I/O group 1024 TB

Generic Host Properties

Host objects (IDs) per system 2048 A host object may contain both Fibre channel ports and iSCSI names
Host objects (IDs) per I/O group 512 Refer to the additional Fibre Channel and iSCSI host limits below
Volume mappings per host object 2048*  *This limit is 512 for Solaris OS
Total Fibre Channel ports and iSCSI names per system 8192
Total Fibre Channel ports and iSCSI names per I/O group 2048
Total Fibre channel ports and iSCSI names per host object 512

Fibre Channel Host Properties (including host attached using FCoE)

Fibre channel hosts per system 2048
Fibre channel host ports per system 8192
Fibre Channel hosts per I/O group 512
Fibre Channel host ports per I/O group 2048
Fibre channel hosts ports per host object (ID) 512

iSCSI Host Properties

iSCSI hosts per system 1024
iSCSI hosts per I/O group 256
iSCSI names per host object (ID) 256
iSCSI names per I/O group 256

Copy Services Properties

Remote Copy (Metro Mirror & Global mirror) relations per system 8192 This can be either Global mirror or metro mirror relationships.
Remote copy relationships per consistency group No limit is imposed beyond the Remote copy relationships per system
Remote copy consistency groups per system 256
Total Metro Mirror & Global Mirror volume capacity per I/O group 1024 TB This limit is the total capacity for all master and auxiliary volumes in the I/O group
Total number of global mirror with change volumes relationships per system 256
Flash copy mappings per system 4096
Flash copy targets per source 256
Flash copy mappings per consistency group 512
Flash copy consistency groups per system 127
Total Flash copy volume capacity per I/O group 1024 TB

IP Partnership Properties

Inter-cluster IP Partnerships per system 1 A system may be partnered with up to three remote systems. A maximum of one of those can be IP and the other two are FC
I/O groups per system 2 The nodes from a maximum of two I/O groups per system can be used for IP partnership
Inter site link per IP Partnership 2 A maximum of two inter site link can be used between two IP partnership sites
Ports per node 1 A maximum of one port per node can be used for IP partnership

Internal Storage Properties

SAS chains per control enclosure 2
Enclosures per SAS chain 5 Up to 5 expansion enclosures on SAS port 1 and up to 4 expansion enclosures on SAS port 2
Expansion enclosures per control enclosure 9
Drives per I/O group 240
Drives per system 960 Maximum requires a system containing four control enclosures, each with the maximum number of expansion enclosures
Min-Max drives per enclosure 0-12

Or

0-24

Limit depends the enclosure model
RAID arrays per system 128
Min-Max member drives per RAID-0 array 1-8
Min-Max member drives per RAID-1 array 2-2
Min-Max member drives per RAID-5 array 3-16
Min-Max member drives per RAID-6 array 5-16
Min-Max member drives per RAID-10 array 2-16
Hot spare drives No limit is compulsory

External Storage System Properties

Storage system WWNs per system (cluster) 1024
Storage system WWPNs per system (cluster) 1024
WWNNs per storage system 16
WWPNs per WWNN 16
LUNs (managed disks) per storage system No limit is imposed beyond the managed disks per system limit

System and User Management Properties

User accounts per system 400 Includes the default user accounts
User groups per system 256 Includes the default user groups
Authentication servers per system 1
NTP servers per system 1
iSNS servers per system 1
Concurrent open SSH sessions per system 10

Event Notification Properties

SNMP servers per system 6
Syslog servers per system 6
Email (SMTP) servers per system 6 Email Servers are used in turn until the email is successfully sent
Email Users (recipients)per system 12
LDAP servers per system 6

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SAN Switch Basics

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