Some time ago,West, Seagate and Toshiba HDD hard-disk manufacturers are involved in the SMR mixAt the root of this matter is that there are some drawbacks SMR the hard drive itself. The final solution will have to come back to technology, Linux 5.6 the kernel has been integrated into the West ZoneFS file system, can improve SMR hard disk reliability.
The biggest benefit of SMR is a massive increase in storage density, which can boost the capacity of HDD hard drives by 25%, but at the expense of write performance, and reliability can be affected by SMR unique ways of writing, especially on NAS hard drives that operate seven x24 hours.
SMR hard disk problems require manufacturers to develop better management technology, while west count also from the file system, for SMR hard disk improvements. At the end of last year they announced ZoneFS file system, which is based on the research results of the partition storage of Western numbers.
The goal of zonefs file system is not to replace general file systems such as ext4, Btrfs, XFS and ZFS, but to simplify the support of partition storage devices by replacing block file access of original devices.
Simply put, ZoneFS can divide the LBA space of the hard disk into multiple blocks, write data only from the beginning of each block, and the data can not be overridden arbitrarily.
This data storage technology can change the way that SMR and SSD hard disks store and write data. There will be no more random data writing problems like now. To write is to write from the beginning in sequence. The shortcomings of SMR and SSD hard disks can be improved.
This February, West announced that ZoneFS filesystem would be submitted to the Linux source code,The Linux 5.6 kernel released at the beginning of may officially integrates this codeIn the future, the reliability of SMR hard disk should be improved.
And this technology will undoubtedly be popularized in the enterprise level, data center and other markets first, consumer-level hard drives may have to wait, and have not found a real test experience for the time being, I do not know whether the SMR hard drives on the market is really different.