ES A24U-G2421

The A24U 4U-profile RAID system is the only high-density choice on the market with sophisticated RAID protection. With reliable SCSI and clustering support, the A24U-G2421 is a cost-effective, large capacity storage solution to incorporate into disk farms, ATM service centers, and imaging stations that require RAID protection at a lower cost per gigabyte.

Datasheet

Highlights
Specifications
Accessories

Full-featured RAID functionality with two (2) SCSI-320 host channels; transfer rate up to 320MBps each
Up to 24TB of storage capacity
Accommodates twenty-four (24) SATA II hard drives, backward compatible with SATA I drives
Hardware XOR engine by dedicated ASIC266 chipsets
Dual-speed cooling modules to reduce system noise
Backplane-based, cableless, modular enclosure

Host-to-Drive Interface	Model	Configuration	Form Factor
SCSI-320 to SATA II	A24U-G2421	Single controller	4U rackmount

RAID

Multiple arrays configurable with dedicated or global hot spare drives
RAID levels: RAID0, 1 (0+1), 3, 5, 6, 10, 30, 50, 60, and NRAID
Online expansion by:
1. Adding new drives
2. Copying and replacing drives with drives of larger capacity
Automatic background rebuild
Configurable stripe size and write policy per array
Intelligent drive handling:
1. In degraded mode: skips irreparable blocks to continue rebuild
2. In normal operation: data-block verification and repair

System Components

Single RAID controller configuration provides full-featured RAID functionality
1. One (1) 4U enclosure
2. One (1) RAID controller module
3. One (1) 512MB DDR RAM DIMM module preinstalled on the controller module; system supports 512MB to 2GB capacity DIMM modules
4. Three (3, N+1) hot-swappable, redundant, 405W power supply units
5. Twenty-four (24) hot-swappable drive trays
6. Two (2) hot-swappable, redundant cooling modules
7. Two (2) forearm front handles
8. One (1) optional battery backup unit (BBU)

Host Interface

Two (2) SCSI-320 host channels interfaced through two (2) dual-stacked VHDCIs
Tagged command queuing up to 256
Host-side ordered tag support

Drive Interface

Twenty-four (24) hot-swappable 3Gbps SATA II drive trays that accommodate 1-inch pitch SATA II or SATA I disk drives
Native Command Queuing (NCQ) support
Dedicated bandwidth to each connected drive
Automatic bad sector reassignment

Management

Firmware-embedded utility via LCD keypad or RS-232C terminal
10/100BaseT Ethernet for out-of-band management
Two (2) COM ports for local access to firmware-embedded utility and UPS connectivity
Telnet access via onboard Ethernet port
Java-based RAIDWatch® Manager
1. Graphical user interface
2. Local/remote management; in-band or out-of-band via TCP/IP
3. Centralized management of multiple subsystems from one management computer
4. A variety of event notification methods via the Configuration Client sub-module: email, fax, LAN broadcast, SNMP traps, MSN messenger, ICQ, and SMS short messages
5. Secure link over SSL

Indicators

Onboard alarm
Module status LED indicators
1. Two (2) per drive tray
2. Two (2) per cooling module
3. One (1) per power supply unit
4. One (1) per BBU module
5. Three (3) per LCD panel
6. Four (4) per RAID controller module
7. Two (2) per Ethernet port
Module failure indication and temperature/voltage readings through I²C bus

Physical/Electrical

Interfaces

Four (4) 68-pin VHDCIs in dual-stacked configurations Two (2) COM ports for RS-232C terminal and UPS connection (38400, n, 8, 1) One (1) 10/100BaseT Ethernet port

Power Supply Module

Three (3) redundant, hot-swappable power supplies with PFC

Nominal Power	405W
DC Output	+3.3V: min. 0.5A, max. 20A +5V: min. 2.5A, max. 36A +12V: min. 1A, max. 24A +5V SB: min. 0A, max. 0.5A
Input Frequency	47 to 63Hz
AC Input	90VAC @ 8AC , 264VAC @ 4AC with PFC

Cooling Module

Two (2) redundant, dual-fan cooling modules

Environmental Specifications

Humidity	5% to 95% (non condensing operating and non-operating)
Temperature	Operating : 5º to 40ºC Non-operating : - 40º to 60ºC
Altitude	Operating : sea level to 12,000 ft Non-operating : sea level to 40,000 ft

Dimensions

Chassis without handles: 445W x 174.4H x 498D mm (17.6 x 6.86 x 19.6 inches)
Chassis with handles 482W x 174.4H x 514D mm (18.97 x 6.86 x 20.2 inches)
Package: 590W x 480H x 700D mm

System Weight

Net weight: 36.5kg
Gross weight: 39.6kg

Spare Parts

	IFT-9373CDTray	3.5" Hard disk drive tray
	IFT-9274CPSU	Power supply module, EonStor 4U 24-bay subsystems, 405W (N+1) capacity
	IFT-9274CFanMod	Cooling fan module for EonStor 4U 24-bay subsystems
	IFT-9274CHandLLCD	Left-side forearm handle for EonStor 4U 24-bayRAID subsystems, LCD panel included
	IFT-9274CHandR	Right-side forearm handle for EonStor 4U 24-bay subsystems
	IFT-84AU24GD24E2	SCSI to SATA RAID controller module, for ES A24U-G2421-2 subsystem, 4 x SCSI-320 VHDCI host connectors, RAID 6.
	IFT-DDRESCEM5	512MB DDR RAM DIMM module, for ASIC266 platform
	IFT-9270ASCab	RS-232C serial cable, audio-jack to DB9
	IFT-9011	Null Modem, DB9 female to DB9 male, wires swapped

Accessories

	IFT-9272CDTrayDmy	Dummy Drive tray, Type-II bezel
	IFT-9274CBTC	Battery cell pack, Li-Ion, EonStor 4U 24-bay subsystems
	IFT-9270UHstCab	SCSI external round cable, DB68 to VHDCI
	IFT-9270UJBODCab	SCSI external round cable, VHDCI to VHDCI
	IFT-9270CUPSCab	UPS cable, audio-jack to DB9
	IFT-9373CSLIDER36	Slide rail assembly, for all EonStor G6 and EonStor DS subsystems, 24"~36" rack depth
	IFT-DDRESCEMA	1GB DDR RAM DIMM module, for ASIC266 platform