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AV-STOR AV-A24U-G2421
4U Profile, 24 drives
Single Controller
SCSI-320 to SATA-II RAID Subsystem
Now with RAID 6
The AV-STOR A24U-G2421 provides unprecedented performance through full utilisation of its 640MB/s host bandwidth with the computing power managing a massive capacity of 24 SATA disk drives. The subsystem handles the 12TB of raw capacity with ease, using the dual PCI-X, custom-built ASICarchitecture that is renowned for its ample margins, flexible load-balancing, and multi-pathing algorithms. Boasting a 2GB internal bandwidth, the dedicated ASIC architecture makes the subsystem ideal for a wide range of applications such as data archiving, backup and restore, near-line DAS, and any environment where cost-effective, mass storage is required.
Available models
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MODELS
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CONTROLLER
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CHANNELS
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DRIVES
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CAPACITY |
| AV-A24U-G2421-1000 |
Single Controller |
2 x SCSI-320 |
24 x 1000GB Seagate SATA |
24TB
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| AV-A24U-G2421-750 |
Single Controller |
2 x SCSI-320 |
24 x 750GB Seagate SATA |
18TB
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| AV-A24U-G2421-500 |
Single Controller |
2 x SCSI-320 |
24 x 500GB Seagate SATA |
12TB
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| AV-A24U-G2421-250 |
Single Controller |
2 x SCSI-320 |
24 x 250GB SATA-2 Nearline |
6.00TB
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Disk Subsytem can be supplied with any quantity of disks. Please call with your requirements
The AV-STOR A24U combines two SCSI-320 host channels with 24 drive bays in a smartly managed enclosure. This scalable, fault-tolerant storage subsystem is well-suited for clustered or direct-attached storage applications and has the flexibilityto serve applications running different I/O characteristics.
Highlights
- Market leading I/O performance
Sustained RAID5 Read/Write: 465/348 (MB/sec)
RAID5 IOPS: 24K
- Ultra-high-density, 4U-profile, 24-bay enclosure
- Optional, hot-swappable battery backup unit (BBU)
- Up to 12TB of storage capacity
- One DDR RAM DIMM module with capacities up to 2GB
- Two (2) SCSI-320 host channels
- Designed for 3Gbps SATA-II disk drives
- Ease of maintenance with hot-swappable FRUs
- Cable-less enclosure design
- Installed Once, Runs Anywhere manageability by Java RAID Management software
- N+1, redundant, hot-swappable power supplies
Reliability
In addition to RAID protection against drive failure, the subsystem has ingenious means to deal with other challenges that may jeopardise data integrity. For example, hard disk drives wear down over time and drives may arrive from the manufacturer with inherent defects. Media Scan and Task Scheduler are among the DrvSmart utilities designed for mending these problems.
The subsystem is also equipped with error containment algorithms, known as the SysSmart functions. If a critical component fails, e.g., a battery module, the subsystem automatically disables write-back caching and assumes the conservative write-through mode. If the fault condition persists for an extended period of time, the subsystem enters an idle state. All of these precautions help ensure safe operation and distribution of data.
Availability
The AV-STOR A24U is powered by field-proven technologies that ensure data protection and performance to meet your various storage needs. Your data is secured by sophisticated, redundant components and advanced firmware developed through a decade of experience in RAID technology design. In addition to the choice of RAID levels, 0, 1(0+1), 3, 5, 6, 10, 30, 50 and 60 , the subsystem protects your data with various high-availability algorithms ranging from predictive checking and self-healing rebuilds to system self-diagnostics.
To ensure a high level of system availability, critical components such as disk drives, power supplies, and cooling fans are all redundant and hot-swappable. Modules are integrated with the passive backplane via board-to-board connectors to eliminate points of failure. Assisted by GUI management software, system administrators can constantly monitor the operatingstatus of all components through a console locally orremotely situated. The subsystem guarantees data integrity with selected, high MTBF components; a modular, fault-tolerant design; and a complete set of environmental monitoring and fault protection capabilities built in the firmware.
Serviceability
All critical modules are housed in separate, retrievable canisters. In the event of component failure, a hard disk drive, power supply, battery module, RAID controller, or cooling fan can be replaced within seconds. The modules are closely monitored using self-diagnostic features and the help of runtime utilities such as STORWatch. Spring screws, securing latches, and key-locks all provide easier access to the modules.
A variety of configuration and monitoring methods are available, either locally via the LCD keypad panel and the text-mode RS-232C terminal, or remotely through the Java-based GUI manager. All faulty conditions, including RAID configuration events, module failure, voltage and temperature readings, are instantly reported. A system administrator can select from the following notification methods to receive reports when away from the installation site: LAN broadcast, SNMP traps, email, fax, SMS, ICQ, and MSN Messenger. Even the notification utility can be installed redundantly on two different machines to avoid the chance of blind time.
Smart Technologies
- Derived from more than ten years of experience in RAID storage design, the AV-STOR's firmware features extremely compact protocol and rich varieties of algorithms to deal with the stringent requirements of storage applications. The technologies enhance I/O processing, drive handling, and system management.
Adaptive Write Policy (Write-back/Write-through)
- Optimises writes performance on receiving sequential write requests using the Write-through mode and temporarily disables synchronised cache communications
- Automatically switches policy to adapt to random or sequential I/O requests
Guaranteed Latency I/O
- Designed for "no drop-frame" applications such as video streaming
- Fast return of read requests by generating data from adjacent stripes when a drive fails or bad sectors cause delays
Major Markets and Uses
Avante Digital products are used in server-attached and networked data storage in major industries such as medical imaging, multimedia on demand (MOD), and digital media including video-on-demand, stream editing and more
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Specifications
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| Subsystem Characteristics |
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High Availability |
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| 600Mhz RISC CPU, 512KB L2 Cache |
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Redundant, hot swappable FRU's |
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| ASIC RAID Engine |
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Subsystem self diagnostics |
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| Single RAID Controller |
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Independent host I/O modules |
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| 256MB to 1GB DDR RAM |
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Independent expansion I/O Modules |
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| Optional BBU per controller |
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Battery backup units |
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UPS status detections |
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Hot-spare disk drives |
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| LCD keypad panel |
1
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Cluster ready |
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| COM ports per controller |
2
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| 10/100 Ethernet port per controller |
1
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Management Software |
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| Diagnostics LEDs on all FRUs |
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Java GUI Software |
Yes
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Terminal via RS-232C |
Yes
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| Drive Interface |
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Telnet over Ethernet |
Yes
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| Number of disk trays |
24
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LCD keypad panel |
Yes
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| SATA-II (backward compatible to SATA-I) |
Yes
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Event notification methods |
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Email |
Yes
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| Host Connection ports |
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Fax |
Yes
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| VHDCI SCSI ports |
4
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LAN broadcast |
Yes
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| Data single channel bandwidth |
320MBps
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SNMP traps |
Yes
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| Tag command queuing |
Yes |
Cell phone message |
Yes |
| Multiple target IDs |
Yes |
Instant messages |
Yes |
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| Raid configuration |
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OS Support |
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| RAID levels 0, 1(0+1), 3, 5, 10, 30, 50, JBOD |
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Microsoft Windows NT |
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| Max 16 logical drives |
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Microsoft Windows 2000 Server |
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| Max 128 LUNs |
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Microsoft Windows 2003 Server |
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| Multiple array configurations |
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Sun Solaris ver 8/9/10 |
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| Automatic background rebuild |
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SGI IRIX >6.5.7 |
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| Smart technologies |
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Mac OS-X 10.2, 10.3, 10.4 |
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Linux (2.4 & 2.6 Kernels) |
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| Requirements |
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| AC Input |
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Dimensions |
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| 240VAC at 4A; 100VAC at 8A with PFC |
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4U, 19 inch rackmount chassis |
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| (auto switching) |
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Without handles: |
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| Relative Humidity: |
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445(w) x 174(h) x 498(d) |
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| 5 to 95% non-condensing |
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With handles: |
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| Operating Temperature: |
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482(w) x 174(h) x 514(d) |
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| 0 to 40 degrees centigrade |
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