cpqCrLogDrvRAIDLevel - Compaq CR3500 RAID Controller Log Drive RAID Level - CPQCR

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cpqCrLogDrvRAIDLevel

Compaq CR3500 RAID Controller Log Drive RAID Level
1.3.6.1.4.1.232.141.2.3.1.1.3

RAID Level. This shows the RAID level of the RAIDset. To change the RAID level, run the Compaq CL1850 Array Configuration Utility. The following values are valid for the RAIDset RAID Level: JBOD (2) Just a Bunch of Drives. Fault tolerance is not enabled. This RAIDset is made up of one device. Does not provide extended data redundancy, availability or protection, and does not use striping for performance enhancements. Good for applications requiring high device capacity. Requires one and only one device. RAID0 (3) A RAIDset using device striping and write-back caching. Data is spread across many devices, offering faster read/write performance than a single device. Does not provide extended data redundancy, availability or protection. Good for applications with large files needing high I/O performance. Requires a minimum of two devices. RAID1 (4) A RAIDset using device mirroring. Any time data is written to a device, a duplicate write is also made to a second device. Reading from multiple devices is usually faster than reading from a single device. Provides extended data redundancy, availability and protection. Good for read-intensive applications needing high availability. Requires a minimum of two devices. RAID0PLUS1 (5) A RAIDset where data is striped across devices and duplicated on an equivalent number of devies. Provides extended data redundancy, availability and protection. Good for applications requiring high availability, high performance and capacity. Requires an even number of devices, and a minimum of four devices. RAID4 (6) A RAIDset using device striping, with one device assigned for parity. Provides extended data redundancy, availability and protection. Good for applications such as graphics and imaging that call for writing huge, sequential blocks of data. Requires a minimum of three devices. RAID5(7) A RAIDset using device striping, with parity distributed across devices. Provides extended data redundancy, availability and protection. Good for transaction processing, applications requiring many, small I/O operations scattered randomly and widely across the devices. Requires a minimum of three devices.

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