Fujitsu ETERNUS DX60 S3 User Manual page 328

Chapter 3 Volume Management
3.19 Snapshot Management for NAS Volumes
Requirements for RAID groups that store the Snapshot destination SDVs
• The RAID group status is not "
• The maximum number of volumes or the maximum volume capacity that can be registered in a RAID
group has not been reached
(SDVs are created in proportion to the specified number of generations in the same RAID group in each
NAS user volume.)
• RAID groups where volumes are already created or are unused
(Snapshot destination SDVs for multiple NAS user volumes can be created in the same RAID group.)
• The RAID group must not belong to a TPP
• The RAID group must not belong to an FTRP
• The RAID group that is not registered as an REC Disk Buffer
• The RAID group that is not registered as an EXCP
Number of Snapshot generation
The following table shows the maximum number of NAS user volumes and the maximum number of
generations for each model.
ETERNUS DX100 S3
ETERNUS DX200 S3
ETERNUS DX500 S3
ETERNUS DX600 S3
*1: Total number of generations for an ETERNUS DX. For example, when using the ETERNUS DX500 S3 and 64
generations of Snapshots are created for two NAS user volumes, Snapshots cannot be configured for the third NAS
user volume.
*2: The maximum number of NAS user volumes and the maximum number of generations after the existing controller
firmware is updated to V10L33 or later.
*3: The maximum number of NAS user volumes and the maximum number of generations when the ETERNUS DX is
shipped from the factory or the maximum number of NAS user volumes and the maximum number of generations
when adding memory (in cold mode) after the existing controller firmware is updated to V10L33 or later.
• This function cannot be used for a NAS user volume if the status is "
" Data Lost".
• Create SDPVs before performing the Snapshot setting.
• This function uses the same copy tables, SDPs, and SnapOPC+ sessions as the Advanced Copy function.
• If the NAS user volume is updated and insufficient capacity cannot be supplemented with SDPVs, the
SnapOPC+ session that is used with Snapshot is in an Error Suspend state.
• A copy table size according to the number of Snapshot generations is required. For a (rough estimate of)
NAS user volume capacity where the Snapshot setting is available, refer to "FUJITSU Storage ETERNUS
DX100 S3/DX200 S3, ETERNUS DX500 S3/DX600 S3 Disk storage system Configuration Guide (NAS)".
Broken", "
Model Maximum number of
NAS user volumes
Without memory
expansion (*2)
With memory
expansion (*3)
ETERNUS Web GUI User's Guide (Settings)
Copyright 2015 FUJITSU LIMITED
No Drive Path", or "
Maximum number of
generations
(per NAS user volume)
1
2
4
4
8
328
SED Locked"
Maximum number of
generations (*1)
(per ETERNUS DX)
16 16
64 64
128 128
128 128
128 256
Not Ready", " Broken", or
P2X0-1270-13ENZ0