Chapter 2 Specifications
2.2 Function Specifications
ETERNUS DX80 S2/DX90 S2 Disk storage system Overview
Copyright 2013 FUJITSU LIMITED P3AM-4812-11ENZ0
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*1: Use of RAID0 is not recommended because it is not redundant. For RAID0 configurations, data may be lost due to the
failure of a single drive.
*2: The maximum number of RAID groups that can be registered (for RAID1).
*3: The maximum number of host information (HBAs) that can be registered. A WWN is registered as the host
information when the HBA of the connected server is FC/FCoE. A SAS address is registered for a SAS HBA and the iSCSI
name and IP address are registered as a set for an iSCSI HBA.
When there are two host interface ports for each ETERNUS DX Disk storage system, the maximum number of
connectable hosts is 512. Since the maximum number of connectable hosts for each port is 256, the maximum
number of connectable hosts for each ETERNUS DX Disk storage system is 256 × the number of ports when the
number of host interface ports is 4 ports or less.
*4: To use this function, the additional license is required (optional function). For the RAID configurations that can be
registered for the Thin Provisioning function or the Flexible Tier function, refer to "Table 4.3
RAID configurations that
can be registered in a Thin Provisioning Pool or a Flexible Tier Pool" (page 38).
*5: For details on the types of Advanced Copy, refer to "6.2
Backup (Advanced Copy)" (page 79).
*6: When the Consistency mode is used, the maximum number of REC buffers is the same as the maximum number of
connectable storage systems.
*7: For details on the maximum number of copy sessions for a single area, refer to the multiple copy section in "6.2.3
Available Advanced Copy Combinations" (page 85).
*8: This value is the total capacity of data that can be copied simultaneously. The copy capacity differs depending on the
settings and the copy conditions.
The following formula can be used to calculate the copy capacity:
Executable copy capacity [GB] = (S[MB] × 1024 ÷ 8[KB] − N) × M ÷ 2 (round down the result)
S: copy table size, N: the number of sessions, M: bitmap ratio
For details about the setting, refer to "ETERNUS Web GUI User’s Guide".
*9: This value was calculated when:
- The maximum copy table size was set for the ETERNUS DX Disk storage system.
- The maximum bitmap ratio was set for the ETERNUS DX Disk storage system.
- The maximum number of the sessions was set for the ETERNUS DX Disk storage system.
- Restore OPC was not used.
*10: For details on REC buffers and REC disk buffers, refer to the Consistency mode section in "6.2.2
Remote Copy" (page
83).
*11: Four (2+2) or eight (4+4) drives are required as configuration drives.
Advanced Copy
*4
Copy capacity (max.)
*8
248TB
*9
240TB
*9
SDP capacity (max.) 128TB
Number of REC buffers (max.)
*10
—4
Size per REC buffer (max.)
*10
— 512MB
REC buffer size per storage system
(max.)
*10
— 512MB
Number of REC disk buffer RAID
groups per REC buffer
*10
—1, 2
Supported RAID levels for REC disk
buffers
*10
—
1+0
*11
Item ETERNUS DX80 S2 ETERNUS DX90 S2
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