Dell PowerVault ME4 Series Storage System Administrator’s Guide

PDF

System configuration limits

The following table lists the system configuration limits for ME4 Series storage systems:

Table 1. ME4 Series system configuration limits
Feature	Value
Enclosures and disks
Maximum enclosures and disks per system 2U12	Supported configurations: 2U12 controller enclosure + nine 2U12 expansion enclosures = 120 2U12 controller enclosure + nine 2U24 expansion enclosures = 228 2U12 controller enclosure + three 5U84 expansion enclosures = 264 2U24 controller enclosure + nine 2U12 expansion enclosures = 132 2U24 controller enclosure + nine 2U24 expansion enclosures = 240 2U24 controller enclosure + three 5U84 expansion enclosures = 276 5U84 controller enclosure + three 5U84 expansion enclosures = 336
Disk groups and pools
Maximum virtual pools per controller module	1
Maximum usable virtual pool size per controller module	512 TiB with the large pools feature disabled in the CLI; 1 PB with the large pools feature enabled in the CLI
Maximum disk-group size	Unlimited (non-ADAPT); 1 PB (ADAPT)
Maximum disk groups per pool	16
Maximum virtual disk groups per controller module	16
Maximum linear disk groups per controller module	32
Minimum/maximum disks per virtual disk group	NRAID (non-RAID): 1/1 (read cache only) RAID 0: 2/2 (read cache only) RAID 1: 2/2 RAID 3: Not supported RAID 5: 3/16 RAID 6: 4/16 RAID 10: 4/16 RAID 50: Not supported ADAPT: 12/128
Minimum/maximum disks per linear disk group	NRAID (non-RAID): 1/1 RAID 0: 2/16 RAID 1: 2/2 RAID 3: 3/16 RAID 5: 3/16 RAID 6: 4/16 RAID 10: 4/16 RAID 50: 6/32 ADAPT:12/128
Maximum dedicated spares per linear disk group	4
Maximum global spares per system	64
Maximum ADAPT groups per controller module	4
Maximum ADAPT single disk size	64 TiB
Maximum ADAPT disk group size	1 PiB
ADAPT stripe width	8+2
Volumes, initiators, hosts, and mapping
Maximum virtual volumes per system	1024
Maximum linear volumes per system	512 (recommended)
Maximum volume size of a virtual volume	128 TiB (approximately 140 TB)
Maximum volume size of a linear volume	Equal to the maximum size limit of the disk group
Maximum mappable volumes (LUNs) per disk group	128
Maximum mappable virtual volumes (LUNs) per pool	512
Maximum mappable linear volumes (LUNs) per pool	128
Maximum mappable volumes (LUNs) per controller module	512
Maximum virtual volumes per pool	1024 (512 base volumes and 512 snapshots)
Maximum linear volumes per pool	1024
Maximum virtual volumes per volume group	1024
Maximum volume groups per controller module	256
Maximum volumes per replication volume group	16
Maximum volumes per host port	1024 (Microsoft Windows limits access to 256)
Maximum initiators per volume	128
Maximum initiators per host port	1024
Maximum initiators per controller module	4096
Maximum initiators per host	128
Maximum hosts per host group	256
Maximum host groups per system	32
Maximum commands per LUN (preferred path)	4096
Maximum queue depth per host port	1024
Maximum host-port link speed	16 Gb FC with capable, qualified SFP+ transceiver 10 GbE iSCSI with capable, qualified SFP + transceiver (CNC only) 12 Gb SAS
Supported FC/iSCSI module host-port configurations, per controller module	4 ports FC 4 ports iSCSI 2 ports FC and 2 ports iSCSI
Virtual volume snapshots
Maximum snapshots per pool	512
Maximum base volumes per system	1024
Maximum base snapshots per snappable volume	254 in the volume snapshot tree with the large pools feature disabled in the CLI 8 in the volume snap shot tree with the large pools feature enabled in the CLI
Maximum mappable snapshots per system	1024
Virtual volume replication
Maximum number of peer connections per system	4
Maximum number of replicated volumes per system	32
Maximum number of replication sets for a volume	1
Maximum number of volumes for a replicated volume group	16, if no other volumes belong to a replication set
Minimum replication frequency that can be scheduled	1
Embedded SMI-S provider
Maximum mapping paths (where a path is a volume presented through a host port to an initiator) NOTE:SMI-S is not supported for a system with 5U84 enclosures.	250
Miscellaneous
Maximum SCSI reservations	Per controller module: 1024 Per LUN: 1
Maximum SCSI registrations for virtual storage	Per system: 32768 Per LUN: 4096
Maximum SCSI registrations for linear storage	Per system: 32768 Per FC LUN: 128 Per iSCSI LUN: 85–128 depending on IQN length Per SAS LUN: 128