Expansion Restrictions

Updated on 2023-10-17 GMT+08:00

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This section describes the restrictions on capacity expansion. You need to learn these restrictions before capacity expansion.

ECS Expansion Restrictions

SAP HANA ECSs: You can change ECS types E1 to E2, E2 to E1, and ET2 to E3. Other ECS type changes are not supported.

SAP application ECSs: You cannot change ECS types H1 and M3.

**Table 1** Supported ECS specification change
ECS Application Scenario	ECS Type Before Change	ECS Type After Change
SAP HANA	E1/E2	E1/E2
	ET2	ET2
	ET2	E3
	e3	e3
SAP applications	H1	H1
	M3	M3
	c6	c6

EVS Disk Capacity Expansion Restrictions

Table 2 describes the restrictions to the EVS disk capacity expansion.

**Table 2** EVS disk capacity expansion restrictions
Type	Restriction
Capacity expansion of EVS disks	Disk capacities can be expanded only, but cannot be reduced.
Capacity expansion of non-shared disks	Only certain ECS OSs support capacity expansion of non-shared disks in the In-use status. For details, see Expanding an In-use EVS Disk. If an EVS disk in the In-use status is to be expanded, the ECS OS to which the EVS disk is mounted must meet the requirements. If the server OS does not support capacity expansion of In-use disks, detach the disk and then expand its capacity. Otherwise, you may need to stop and then start the ECS after the expansion to make the expansion takes effect. You do not need to shut down the ECS if OSs are: SUSE Linux Enterprise Server 12 SP3 64bit SUSE Linux Enterprise Server 12 SP2 64bit SUSE Linux Enterprise Server 12 SP1 64bit
Capacity expansion of shared disks	A shared disk must be detached from the ECS before expansion, and the shared disk status must be Available.
Expansion increment	1 GB

NOTICE:

When a disk has been put to use, you must check the disk partition style before expanding its capacity as follows:

If the MBR partition style is used, the maximum disk capacity supported is 2 TB (2048 GB), and the disk space exceeding 2 TB cannot be allocated and used.
With GPT, you can expand the capacity of a data disk to up to 32 TB. An EVS data disk supports up to 32 TB (32768 GB) so that you can expand the capacity of a data disk to up to 32 TB when the GPT partition style is used.

If the in-use partition style is MBR and the disk capacity needs to be expanded to over 2 TB, change the partition style from MBR to GPT. Ensure that the disk data has been backed up before changing the partition style because services will be interrupted and data on the disk will be cleared during this change.

Parent topic: Before You Start

Previous topic: Expansion Scenario

Next topic: Impact

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