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As the drive is aimed at the Enterprise market segment it comes as no real surprise to receive the drive from Toshiba in just a plain plastic shell with no retail packaging.
Toshiba's 22TB MG10 is built on a 26.11mm thick, 3.5in format. It uses Toshiba’s fourth-generation Helium technology enabling Toshiba to use ten 2TB platters and 20 heads in the enclosure. The drive has a spindle speed of 7,200rpm and there is 512MB of cache. The MG10 series uses a range of technologies to prevent data corruption which is a real risk with today's disc densities.
Along with TDMR (Two-Dimensional Magnetic Recording) technology, there is Toshiba's Flux Control Microwave-assisted Magnetic Recording, Stable Platter technology and Toshiba’s Dynamic Cache Technologies. There are also built-in RV (Rotational Vibration) sensors and Persistent Write Cache Technology.
Flux Control Microwave-assisted Magnetic Recording (FC-MAMR).
Toshiba's Flux Control Microwave Assisted Magnetic Recording (FC-MAMR) technology uses microwave energy to ensure more of the write energy is focused on the platter. Two magnetic layers are built into the write gap of the write head and a bias current is applied which reverses the magnetization of one of the layers, an effect known as spin-transfer torque, improving the recording field and the performance of the write head. Using this technology allows Toshiba to achieve an increase in areal density capability (ADC) of up to 20%.
Stable Platter
In multi-bay systems, vibration can be a serious problem causing mis-tracking problems when reading/writing data. Toshiba’s Stable Platter Technology minimizes these vibrations by stabilizing the motor shaft at both ends improving tracking accuracy and ensuring maximum performance during read and write operations.
Dynamic Cache
Toshiba’s Dynamic Cache Technology is a self-contained cache algorithm with on-board buffer management, that optimises how the cache is allocated during read/write operations.
Persistent Write Cache Technology
Designed to protect data if power is lost while being written to the disk. If there is a power supply interruption while the drive is writing to the disc, the data is saved in the large flash-based cache and written to the drive when the power is restored.
As well as Toshiba's Stable Platter Technology preventing the effects of vibration in large multi-bay systems, the drive also has built-in RV (Rotational Vibration) sensors (the small angled metal objects on the top right and bottom left of the PCB). These sensors compensate for any rotational vibration detected, eliminating the possibility of ‘knock-on' vibration in multi-bay server systems.
