Table 40 Maximum Vvol Capacity; Table 41 Vvol Management Information Specifications - Fujitsu ETERNUS AF250 Design Manual

1. Function
Server Linkage Functions
●
Maximum VVOL Capacity
The following shows the maximum capacity that can be used for VVOLs from the maximum Thin Provisioning
Pool capacity that is set in the ETERNUS AF.

Table 40 Maximum VVOL Capacity

Item
Maximum TPP capacity (reference)
Maximum VVOL capacity
●
VVOL Management Information
Additional information called VVOL management information (metadata) is necessary for VVOLs. VVOL manage-
ment information is usually synchronized with the master information in the ETERNUS SF Storage Cruiser and
saved to a dedicated FTV within the ETERNUS AF container. The dedicated FTV is automatically created in the
storage container when creating a VVOL.

Table 41 VVOL Management Information Specifications

Item
Volume name (fixed)
Volume type
Usage
Usage details
Capacity
Volume number (of each ETER-
NUS AF)
When using VVOLs, LUN#224 to LUN#255 (or LUN numbers that are recognized on the server side) cannot
•
be used as Virtual Machine File System (VMFS) volumes because they are used for management.
Use ETERNUS SF Storage Cruiser to change the VVOL settings. Do not change any of the settings from ETER-
•
NUS Web GUI or ETERNUS CLI, except to enable the VVOL function.
If a VVOL management information dedicated FTV fails because of errors such as a RAID group failure, the
•
VVOL management information dedicated FTV must be recovered by recovering the RAID group, deleting
and recreating the VVOL management information dedicated FTV using ETERNUS CLI, and by performing a
backup (or synchronizing the VVOL management information) using ETERNUS SF Storage Cruiser.
If the VVOL management information dedicated FTV is formatted, performing a backup (or synchronizing
•
the VVOL management information), and recovery of the VVOL management information dedicated FTV us-
ing ETERNUS SF Storage Cruiser is required.
If the FTRP has already been created and the maximum Thin Provisioning Pool capacity and the chunk size
•
are changed, before setting VVOL using ETERNUS SF Storage Cruiser, execute the "set vvol-mode" command
of ETERNUS CLI to enable the VVOL function. For details on the chunk size, refer to
46).
When registering multiple FTRPs in a storage container, do not mix FTRPs with different chunk sizes in the
•
same storage container.
To use VMware vSphere Replication, the controller firmware version of the ETERNUS AF must be V10L80 or
•
later.
Explanation
$VVOL_META
FTV
System
VVOL management information
1,040MB
1
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays Design Guide (Basic)
Copyright 2019 FUJITSU LIMITED
ETERNUS AF250 S2/AF250
2,048TB
256TB
117
"Thin Provisioning" (page
P3AG-1822-09ENZ0