This article was reprinted with permission from Superpower.com.
Many high-capacity hard disks are now turning to SMR tile magnet recording technology. The advantage of SMR is that the storage density is greater than the conventional magnetic recording mode. However, the read and write characteristics of HDDs are greatly reduced, and the write speed is affected. The most serious.
Western Digital is now introducing an adoption 14TB mechanical hard disk Ultrastar DC HC530 with CMR's traditional magnetic recording technology, It has better reading and writing performance than SMR products.
In fact, Western Digital's 14 TB drive using CMR technology is supposed to be the second in the world. Last December, Toshiba launched such a product.
Western Digital's Ultrastar DC HC530 is not intended for the average consumer. It is aimed at ultra-large-scale cloud computing service providers. There are two kinds of SATA 6Gbps and SAS 12Gbps, using the fifth generation HelioSeal charging technology , How many discs are still not clear, support TDMR technology, use of bipolar micro-actuators, can improve the positioning accuracy of the head to provide better performance and data integrity and hard disk reliability.
The specifications of SATA and SAS are basically the same. The spindle speed of the hard disk is 7200rpm, with 512MB of external cache, and there are two versions of native 4K sectors and 512bit analog sectors. Maximum continuous read and write speeds are 255MB/s and 267MB/s respectively , SATA version of the power consumption will save points, standby 5.6W load 7.6W.
The SAS version is a standby 6.3W load of 10.2W, MTBF failure time of 2.5 million hours, an annual write life of up to 550TB, 5 years warranty.
