Chapter 3. IBM System Storage DS4000 and DS5000 hardware 25
The key DS4700 features are:
Compact, 3U rack-mountable enclosures containing dual high-performance intelligent
RAID controller cards, accommodating 16 SATA or FC E-DDMs.
DS4700 supports up to 12 TB with 750 GB SATA disks, up to 16 TB with 1 TB SATA disks,
and 4.8 TB with 300 GB FC disks (7.2 TB with 450 GB FC disks). Adding the EXP810 or
EXP710 storage enclosure raises the size of the storage up to 84 TB (using 750 GB
SATA), 112 TB (using 1 TB SATA) using the EXP810, and to 30 TB using the EXP710.
Controller firmware (CFW) Version 6.23 and later (V7.10 and V7.30) allows the intermixing
of expansion units (EXP710 and EXP810) and also the intermixing of FC and SATA disks
in the same enclosure (only for EXP810) or storage subsystem.
Utilizes 667 Mhz xScale processor with embedded XOR engines on RAID controllers.
Dual, redundant 4 Gbps RAID controllers with up to 4 GB of cache memory (2 GB per
RAID controller).
New lithium-ion battery backup protects data cache in each controller for at least 72 hours.
Hot-swappable cache backup battery.
Redundant, hot-swappable power supplies and fans.
Supports RAID 0, RAID 1, RAID 3, RAID 5, RAID 6, and RAID 10 (RAID 1+0).
Switched loop architecture that supports two dual redundant FC disk loops.
Auto-negotiates 1, 2, or 4 Gbps host connection speeds.
Supports Global Hot Spare.
Host-side connections support Fibre Channel switched, loop, or direct connections.
Redundant drive-side connections designed to avoid any single point of failure and
maintain high availability.
Supports up to six EXP810 (each EXP810 has 16 disk bays) to attach up to 112 FC disks
(additional licenses required).
The following disks are supported:
– 2 Gbps FC: 10K rpm, 300 GB/146 GB/73 GB/36 GB
– 2 Gbps FC: 15K rpm, 300 GB/146 GB/73 GB/36 GB
– 4 Gbps FC: 15K rpm, 300 GB146 GB/73 GB/36 GB
– 4 Gbps FC: 15K rpm, 600GB/450 GB
– 4 Gbps SATA: 7200 rpm, 500 GB E-DDM, 750 GB E-DDM, 1 TB E-DDM (SATA and FC
cannot be intermixed in the same enclosure.)
Supports shortwave Fibre Channel 4 Gbps host attachment (on initial release).
Supports multiple heterogeneous server and operating system (host kits required).
Both models 70 and 72 have selectable storage partitions up to 128.
Powerful on demand functions: Dynamic volume expansion, dynamic capacity expansion,
and dynamic RAID level migration, which allow users to modify storage configurations
on-the-fly without incurring any downtime.
New Remote Support Manager (RSM) support to notify IBM (Call Home) in case of
problems or failures. See Chapter 6, “IBM Remote Support Manager for Storage” on
page 285 for more details about RSM.
New dual 10/100 Ethernet for out-of-band management to separate out-of-band
management from service diagnostics for each controller.
FlashCopy, VolumeCopy, and Enhanced Remote Mirroring (premium features).
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