2U Rackmount YA-08SAEF4
8 bays 4Gbit FC to SATA II RAID Subsystem |
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2U Rackmount YA-12SAEF4
12 bays 4Gbit FC to SATA II RAID Subsystem |
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3U Rackmount YA-16SAEF4
16 bays 4Gbit FC to SATA II RAID Subsystem |
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Enhance Features:
 Instant Availability/Background Initialization
RAID 0 and RAID 1 volume set can be used immediately after the creation. But the RAID 3, 5 and 6 volume sets must be initialized to generate the parity. In the Normal Initialization, the initialization proceeds as a background task, the volume set is fully accessible for system reads and writes. The operating system can instantly access to the newly created arrays without requiring a reboot and waiting the initialization complete. Furthermore, the RAID volume set is also protected against a single disk failure while initialing. In Fast Initialization, the initialization proceeds must be completed before the volume set ready for system accesses.
Array Roaming
The RAID subsystem stores configuration information both in NVRAM and on the disk drives it can protect the configuration settings in the case of a disk drive or controller failure. Array roaming allows the administrators the ability to move a completely raid set to another system without losing RAID configuration and data on that raid set. If a server fails to work, the raid set disk drives can be moved to another server and inserted in any order.
Online Capacity Expansion
Online Capacity Expansion makes it possible to add one or more physical drive to a volume set, while the server is in operation, eliminating the need to store and restore after reconfiguring the raid set. When disks are added to a raid set, unused capacity is added to the end of the raid set. Data on the existing volume sets residing on that raid set is redistributed evenly across all the disks. A contiguous block of unused capacity is made available on the raid set. The unused capacity can create additional volume set. The expansion process is illustrated as following figure.
The RAID subsystem controller redistributes the original volume set over the original and newly added disks, using the same fault-tolerance configuration. The unused capacity on the expand raid set can then be used to create an additional volume sets, with a different fault tolerance setting if user need to change.
Online RAID Level and Stripe Size Migration
User can migrate both the RAID level and stripe size of an existing volume set, while the server is online and the volume set is in use. Online RAID level/stripe size migration can prove helpful during performance tuning activities as well as in the event those additional physical disks are added to the RAID subsystem. Before the invention of RAID level and stripe size migration, changing the RAID level and stripe size of a RAID system meant backing up all data in the disk array, re-creating disk array configuration with new RAID level and stripe size, and then restoring data back into RAID system. For example, in a system using two drives in RAID level 1, you could add capacity and retain fault tolerance by adding one drive. With the addition of third disk, you have the option of adding this disk to your existing RAID logical drive and migrating from RAID level 1 to 5. The result would be parity fault tolerance and double the available capacity without taking the system off.
RAID 6
A RAID 6 array is essentially an extension of a RAID 5 array with a second independent distributed parity scheme. Data and parity are striped on a block level across multiple array members, just like in RAID 5, and a second set of parity is calculated and written across all the drives. As larger disk arrays are considered, it is desirable to use stronger codes that can tolerate multiple disk failure. When a disk fails in a parity protected disk array, recovering the contents of the failed disk requires successfully reading the contents of all no-failed disks. RAID 6 provides an extremely high fault tolerance, and can sustain two simultaneous drive failures without downtime or data loss. This is a perfect solution when data is mission-critical.
SNMP
Yotta A RAID subsystem firmware-embedded Simple Network Management Protocol (SNMP). An SNMP-based management application (also known as an SNMP manager) can monitor the disk array. An example of An SNMP management application is Hewlett-PackardĦĤs Open View. The firmware-embedded SNMP agent can be used to augment the RAID controller if you are already running an SNMP management application at your site.
MPIO
Multipathing solutions are designed to provide failover through the use of redundant physical path componentsĦXadapters, cables, and switchesĦXbetween the server and storage device under Microsoft environments.
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| Model |
YA-08SAEF4 |
YA-12SAEF4 |
YA-16SAEF4 |
| RAID Engine |
Intel Xscale i80321@400Mhz |
| Controller# |
1 |
| RAID Levels |
0,1,0+1,3,5,6,and JBOD |
Cache Support
(Write back) |
Up to 1GB of DDR 266 SDRAM |
| System Type |
Rack mountable 2U |
Rack mountable 3U |
| Host Interface |
4Gb Fiber Channels |
| Disk Interface |
SATA II |
| Host Transfer Rate |
4Gb/sec per channel |
| Disk Channel |
8 of SATAII (3Gb) |
12 of SATAII (3Gb) |
16 of SATAII (3Gb) |
| LCD Display |
2 Lines by 16 characters |
| Hot Swap and redundant |
Yes (Power Supply, Hard Disk Drive & Fan) |
| Hot Spare |
Yes (Disk Down) |
| Battery Back-Up Module |
Optional, Supporting 72 hours battery back-up time |
| LAN |
Web browser-based RAID manager via build in 10/100 Ethernet port |
| Array Management Support |
Yes. |
| Automatic Bad-Sector & Error Recovery |
Yes. |
| Automatic Drive Rebuilds |
Yes. Automatic Data rebuilds. |
| Alarm buzzer and E-mail Notificatio |
Yes |
| Online Array Roaming |
Yes |
| Online RAID level Migration |
Yes |
| Online Capacity Eapansion and RAID Level Migration simultaneously |
Yes |
| Remote Terminal Configuration |
Yes. Through RS-232 or 10/100 Ethernet port |
| Operating Systems |
OS independent and transparent |
| Power Supply |
Redundant by Dual 375W Power modules with PFC feature, Loading Sharing type and cable-less design. |
Redundant by Dual 460W Power modules with PFC feature, Loading Sharing type and cable-less design. |
| Electrical |
AC Voltage 100-240 VAC/AC Frequency 50-60Hz |
| Temperature |
Operating Temperature : 10 to 35 degree C. |
| Relative Humidity |
20% to 80% non-condensing |
| Dimensions |
446.4(W) x 2U(H) x 478(D) |
446.4mm(W) x 3U(H) x 465mm(D) |
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