Sans Digital introduces its 5-bay storage enclosures, the TowerRAID TR5M-B. This unit is significantly for high capacity storage needs. The five 3.5-inch SATA hard disk drives to a single eSATA Port Multiplier interface. TowerRAID TR5M-B comes with a built-in ventilating protective screen front panel. To support five hard drives, the unit makes use of a cable-less backplane design supporting hot-swappable SATA I and SATA II. It has an easy access hard drive trays where the five hard drives are installed for an uncomplicated insertion and removal. It is equipped with a large 4.7 ball bearing cooling fan, located at the back of the unit, necessary for hard drive cooling. This device is a compact RAID tower. Using the latest SATA II port multiplier technology, the TR5M-B uses only one cable to access five SATA drives. To easily access five hard drives through JBOD mode, Spanning, or RAID 0, 1, 1+0 and 5 with spare via software utilities, the TowerRAID TR5M-B utilizes the bundled 2-port eSATA PCIe adapter to connect up to two units for a maximum of 10 HDDs.

The JBOB is not among the numbered RAID levels but appears as an individual hard disk instead of a single large disk. Usually, it defaults to JBOD configuration for attached disks when a hardware RAID controller is used. Spanning or concatenated array is likewise not RAID but slower than a RAID-0. It is a set of disks linked together purposely to create a larger logical disk. The function of a RAID-0 is that it splits data evenly across two or more disks (striped) with no parity information for redundancy to increase performance. On the other hand, RAID 1 generates an exact copy or mirror of a set of data on two or more disks. RAID 5 utilizes block-level striping with parity data spread across all member disks. For a complete RAID 5 configuration, a minimum of 3 disks generally required.

Posted 2010-09-18 and updated on Sep 30, 2010 10:27pm by richard opinion

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